/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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:15:18,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:15:18,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:15:18,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:15:18,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:15:18,217 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:15:18,220 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:15:18,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:15:18,229 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:15:18,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:15:18,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:15:18,239 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:15:18,240 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:15:18,244 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:15:18,246 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:15:18,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:15:18,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:15:18,266 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:15:18,274 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:15:18,282 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:15:18,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:15:18,287 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:15:18,289 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:15:18,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:15:18,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:15:18,302 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:15:18,303 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:15:18,305 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:15:18,306 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:15:18,307 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:15:18,307 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:15:18,308 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:15:18,311 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:15:18,312 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:15:18,314 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:15:18,314 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:15:18,315 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:15:18,315 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:15:18,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:15:18,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:15:18,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:15:18,326 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 [2020-10-27 01:15:18,383 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:15:18,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:15:18,389 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:15:18,389 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:15:18,390 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:15:18,390 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:15:18,390 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:15:18,390 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:15:18,391 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:15:18,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:15:18,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:15:18,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:15:18,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:15:18,393 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:15:18,393 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:15:18,394 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:15:18,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:15:18,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:15:18,394 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:15:18,394 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:15:18,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:15:18,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:15:18,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:15:18,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:15:18,396 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:15:18,396 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:15:18,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:15:18,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:15:18,396 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:15:18,397 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:15:18,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:15:18,888 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:15:18,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:15:18,894 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:15:18,895 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:15:18,896 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-2.i [2020-10-27 01:15:18,990 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e3fe98672/67d0bf7b594845eb8855f4f5202613e6/FLAG27f5f15ee [2020-10-27 01:15:19,803 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:15:19,803 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-2.i [2020-10-27 01:15:19,820 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e3fe98672/67d0bf7b594845eb8855f4f5202613e6/FLAG27f5f15ee [2020-10-27 01:15:20,102 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e3fe98672/67d0bf7b594845eb8855f4f5202613e6 [2020-10-27 01:15:20,106 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:15:20,113 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:15:20,117 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:15:20,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:15:20,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:15:20,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:15:20" (1/1) ... [2020-10-27 01:15:20,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eeeb800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:20, skipping insertion in model container [2020-10-27 01:15:20,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:15:20" (1/1) ... [2020-10-27 01:15:20,139 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:15:20,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:15:20,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:15:20,653 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:15:20,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:15:20,848 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:15:20,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:20 WrapperNode [2020-10-27 01:15:20,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:15:20,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:15:20,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:15:20,851 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:15:20,866 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:20" (1/1) ... [2020-10-27 01:15:20,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:20" (1/1) ... [2020-10-27 01:15:20,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:20" (1/1) ... [2020-10-27 01:15:20,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:20" (1/1) ... [2020-10-27 01:15:20,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:20" (1/1) ... [2020-10-27 01:15:20,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:20" (1/1) ... [2020-10-27 01:15:20,990 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:20" (1/1) ... [2020-10-27 01:15:21,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:15:21,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:15:21,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:15:21,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:15:21,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:20" (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 [2020-10-27 01:15:21,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:15:21,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:15:21,120 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:15:21,121 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 01:15:21,121 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 01:15:21,121 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-27 01:15:21,121 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:15:21,121 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:15:21,122 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:15:21,122 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:15:21,122 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:15:21,122 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:15:21,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:15:21,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:15:21,123 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 01:15:21,123 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 01:15:21,123 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 01:15:21,123 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 01:15:21,123 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 01:15:21,123 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 01:15:21,124 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 01:15:21,124 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 01:15:21,124 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 01:15:21,124 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 01:15:21,124 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 01:15:21,125 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 01:15:21,125 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 01:15:21,125 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 01:15:21,125 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 01:15:21,125 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 01:15:21,125 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 01:15:21,126 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 01:15:21,126 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 01:15:21,126 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 01:15:21,126 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 01:15:21,126 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 01:15:21,126 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 01:15:21,127 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 01:15:21,127 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 01:15:21,127 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 01:15:21,127 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 01:15:21,127 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 01:15:21,127 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 01:15:21,128 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 01:15:21,128 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 01:15:21,128 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 01:15:21,128 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 01:15:21,128 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 01:15:21,128 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 01:15:21,128 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 01:15:21,129 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 01:15:21,129 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 01:15:21,129 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 01:15:21,129 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 01:15:21,129 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 01:15:21,129 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 01:15:21,130 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 01:15:21,130 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 01:15:21,130 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 01:15:21,130 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 01:15:21,130 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 01:15:21,130 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 01:15:21,131 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 01:15:21,131 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 01:15:21,131 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 01:15:21,131 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 01:15:21,131 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:15:21,132 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 01:15:21,132 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 01:15:21,132 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 01:15:21,132 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 01:15:21,132 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 01:15:21,132 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 01:15:21,133 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 01:15:21,133 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 01:15:21,133 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 01:15:21,133 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 01:15:21,133 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 01:15:21,133 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 01:15:21,134 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 01:15:21,134 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 01:15:21,134 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 01:15:21,134 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 01:15:21,134 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 01:15:21,134 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 01:15:21,135 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 01:15:21,135 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 01:15:21,135 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 01:15:21,135 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 01:15:21,135 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 01:15:21,136 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 01:15:21,136 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 01:15:21,136 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 01:15:21,136 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 01:15:21,136 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 01:15:21,136 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 01:15:21,137 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 01:15:21,137 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 01:15:21,137 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 01:15:21,137 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 01:15:21,138 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 01:15:21,138 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 01:15:21,138 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 01:15:21,138 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 01:15:21,138 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 01:15:21,139 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 01:15:21,139 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 01:15:21,139 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 01:15:21,139 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 01:15:21,140 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 01:15:21,140 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 01:15:21,140 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 01:15:21,140 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 01:15:21,140 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 01:15:21,141 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 01:15:21,141 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 01:15:21,141 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 01:15:21,141 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 01:15:21,141 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-27 01:15:21,141 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:15:21,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:15:21,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:15:21,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:15:21,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:15:21,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:15:21,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:15:21,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:15:21,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:15:21,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:15:21,827 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-27 01:15:22,304 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:15:22,305 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-27 01:15:22,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:15:22 BoogieIcfgContainer [2020-10-27 01:15:22,308 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:15:22,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:15:22,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:15:22,315 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:15:22,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:15:20" (1/3) ... [2020-10-27 01:15:22,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66ccded5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:15:22, skipping insertion in model container [2020-10-27 01:15:22,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:20" (2/3) ... [2020-10-27 01:15:22,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66ccded5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:15:22, skipping insertion in model container [2020-10-27 01:15:22,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:15:22" (3/3) ... [2020-10-27 01:15:22,320 INFO L111 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-2.i [2020-10-27 01:15:22,336 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:15:22,343 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:15:22,361 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:15:22,393 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:15:22,393 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:15:22,393 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:15:22,394 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:15:22,394 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:15:22,394 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:15:22,394 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:15:22,394 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:15:22,421 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2020-10-27 01:15:22,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:15:22,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:22,432 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:22,433 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:22,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:22,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1723059971, now seen corresponding path program 1 times [2020-10-27 01:15:22,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:22,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136320786] [2020-10-27 01:15:22,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:22,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:22,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:22,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:22,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:22,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:22,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:23,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:23,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:23,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:15:23,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:15:23,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 690 [2020-10-27 01:15:23,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:23,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:23,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:15:23,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:23,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:15:23,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:23,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:23,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:23,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:23,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:23,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:23,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 01:15:23,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:23,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:23,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:23,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:23,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:15:23,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136320786] [2020-10-27 01:15:23,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:15:23,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 01:15:23,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316331874] [2020-10-27 01:15:23,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 01:15:23,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:23,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 01:15:23,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:15:23,532 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 3 states. [2020-10-27 01:15:23,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:23,761 INFO L93 Difference]: Finished difference Result 115 states and 176 transitions. [2020-10-27 01:15:23,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 01:15:23,764 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-27 01:15:23,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:23,774 INFO L225 Difference]: With dead ends: 115 [2020-10-27 01:15:23,774 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 01:15:23,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:15:23,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 01:15:23,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-27 01:15:23,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:15:23,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2020-10-27 01:15:23,829 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 22 [2020-10-27 01:15:23,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:23,830 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2020-10-27 01:15:23,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 01:15:23,830 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2020-10-27 01:15:23,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:15:23,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:23,832 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] [2020-10-27 01:15:23,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:15:23,833 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:23,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:23,834 INFO L82 PathProgramCache]: Analyzing trace with hash 80260039, now seen corresponding path program 1 times [2020-10-27 01:15:23,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:23,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577369489] [2020-10-27 01:15:23,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:23,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:23,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:23,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:24,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:24,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:15:24,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:15:24,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 328 [2020-10-27 01:15:24,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:24,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:15:24,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:15:24,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:15:24,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:24,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:24,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:24,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:24,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:24,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:24,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:24,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 01:15:24,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:24,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:24,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:24,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:24,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:15:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:15:24,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577369489] [2020-10-27 01:15:24,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:15:24,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:15:24,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014261188] [2020-10-27 01:15:24,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:15:24,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:24,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:15:24,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:15:24,307 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand 4 states. [2020-10-27 01:15:24,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:24,586 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2020-10-27 01:15:24,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:15:24,587 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-27 01:15:24,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:24,590 INFO L225 Difference]: With dead ends: 79 [2020-10-27 01:15:24,591 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 01:15:24,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:15:24,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 01:15:24,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-27 01:15:24,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 01:15:24,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2020-10-27 01:15:24,625 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 27 [2020-10-27 01:15:24,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:24,626 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2020-10-27 01:15:24,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:15:24,626 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2020-10-27 01:15:24,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:15:24,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:24,628 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, 1, 1, 1] [2020-10-27 01:15:24,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:15:24,630 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:24,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:24,633 INFO L82 PathProgramCache]: Analyzing trace with hash 510744340, now seen corresponding path program 1 times [2020-10-27 01:15:24,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:24,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833934519] [2020-10-27 01:15:24,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:24,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:24,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:24,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:25,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:25,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:15:25,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:15:25,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 551 [2020-10-27 01:15:25,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:25,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:15:25,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:15:25,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:15:25,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:25,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:25,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:25,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:25,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:25,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:25,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:25,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 01:15:25,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:25,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:25,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:25,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:25,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:25,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:15:25,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833934519] [2020-10-27 01:15:25,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:15:25,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:15:25,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600993574] [2020-10-27 01:15:25,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:15:25,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:25,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:15:25,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:15:25,360 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand 6 states. [2020-10-27 01:15:25,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:25,848 INFO L93 Difference]: Finished difference Result 150 states and 216 transitions. [2020-10-27 01:15:25,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:15:25,848 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-10-27 01:15:25,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:25,850 INFO L225 Difference]: With dead ends: 150 [2020-10-27 01:15:25,850 INFO L226 Difference]: Without dead ends: 112 [2020-10-27 01:15:25,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:15:25,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-27 01:15:25,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-10-27 01:15:25,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 01:15:25,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 115 transitions. [2020-10-27 01:15:25,872 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 115 transitions. Word has length 33 [2020-10-27 01:15:25,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:25,872 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 115 transitions. [2020-10-27 01:15:25,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:15:25,873 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 115 transitions. [2020-10-27 01:15:25,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:15:25,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:25,876 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, 1, 1, 1] [2020-10-27 01:15:25,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:15:25,877 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:25,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:25,878 INFO L82 PathProgramCache]: Analyzing trace with hash 729599058, now seen corresponding path program 1 times [2020-10-27 01:15:25,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:25,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146417599] [2020-10-27 01:15:25,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:25,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:25,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:26,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:26,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:15:26,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:26,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-27 01:15:26,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:26,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:15:26,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 01:15:26,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:15:26,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:26,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:26,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:26,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:26,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:26,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:26,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:26,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:15:26,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:26,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:26,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:26,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:26,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:26,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:26,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146417599] [2020-10-27 01:15:26,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:15:26,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:15:26,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642607364] [2020-10-27 01:15:26,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:15:26,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:26,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:15:26,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:15:26,135 INFO L87 Difference]: Start difference. First operand 80 states and 115 transitions. Second operand 6 states. [2020-10-27 01:15:26,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:26,392 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2020-10-27 01:15:26,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:15:26,393 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-10-27 01:15:26,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:26,396 INFO L225 Difference]: With dead ends: 106 [2020-10-27 01:15:26,396 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 01:15:26,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:15:26,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 01:15:26,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2020-10-27 01:15:26,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 01:15:26,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 127 transitions. [2020-10-27 01:15:26,411 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 127 transitions. Word has length 33 [2020-10-27 01:15:26,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:26,411 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 127 transitions. [2020-10-27 01:15:26,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:15:26,412 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 127 transitions. [2020-10-27 01:15:26,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:15:26,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:26,413 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:26,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:15:26,414 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:26,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:26,415 INFO L82 PathProgramCache]: Analyzing trace with hash 585622541, now seen corresponding path program 1 times [2020-10-27 01:15:26,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:26,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459077576] [2020-10-27 01:15:26,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:26,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:26,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:26,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:15:26,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:26,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-27 01:15:26,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:26,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:15:26,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 01:15:26,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:15:26,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:26,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:26,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:26,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:26,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:26,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:26,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:26,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:15:26,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:26,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:26,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:26,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:26,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:26,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459077576] [2020-10-27 01:15:26,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:15:26,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:15:26,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571706097] [2020-10-27 01:15:26,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:15:26,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:26,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:15:26,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:15:26,605 INFO L87 Difference]: Start difference. First operand 89 states and 127 transitions. Second operand 6 states. [2020-10-27 01:15:26,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:26,844 INFO L93 Difference]: Finished difference Result 108 states and 148 transitions. [2020-10-27 01:15:26,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:15:26,844 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-27 01:15:26,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:26,846 INFO L225 Difference]: With dead ends: 108 [2020-10-27 01:15:26,846 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 01:15:26,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:15:26,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 01:15:26,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-27 01:15:26,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 01:15:26,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 124 transitions. [2020-10-27 01:15:26,869 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 124 transitions. Word has length 35 [2020-10-27 01:15:26,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:26,869 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 124 transitions. [2020-10-27 01:15:26,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:15:26,870 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 124 transitions. [2020-10-27 01:15:26,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:15:26,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:26,872 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:26,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:15:26,872 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:26,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:26,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1777671693, now seen corresponding path program 1 times [2020-10-27 01:15:26,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:26,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922514670] [2020-10-27 01:15:26,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:26,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:26,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:26,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:15:26,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:26,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-27 01:15:26,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:26,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:15:26,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 01:15:26,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:15:27,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 16 [2020-10-27 01:15:27,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:27,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:27,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:27,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:27,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:27,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:15:27,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:27,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:27,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:27,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:27,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:27,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922514670] [2020-10-27 01:15:27,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:15:27,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:15:27,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092562259] [2020-10-27 01:15:27,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:15:27,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:27,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:15:27,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:15:27,075 INFO L87 Difference]: Start difference. First operand 87 states and 124 transitions. Second operand 6 states. [2020-10-27 01:15:27,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:27,309 INFO L93 Difference]: Finished difference Result 108 states and 148 transitions. [2020-10-27 01:15:27,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:15:27,310 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-27 01:15:27,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:27,312 INFO L225 Difference]: With dead ends: 108 [2020-10-27 01:15:27,312 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 01:15:27,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:15:27,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 01:15:27,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 84. [2020-10-27 01:15:27,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 01:15:27,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 120 transitions. [2020-10-27 01:15:27,331 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 120 transitions. Word has length 35 [2020-10-27 01:15:27,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:27,331 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 120 transitions. [2020-10-27 01:15:27,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:15:27,331 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 120 transitions. [2020-10-27 01:15:27,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:15:27,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:27,337 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:27,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:15:27,338 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:27,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:27,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1980453703, now seen corresponding path program 1 times [2020-10-27 01:15:27,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:27,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941877506] [2020-10-27 01:15:27,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:27,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:27,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:27,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:27,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:27,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:15:27,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:15:27,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 532 [2020-10-27 01:15:27,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:27,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:15:27,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:15:27,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:15:27,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:28,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:28,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:28,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:28,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:28,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:28,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:15:28,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:28,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:28,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:28,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:28,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:28,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:28,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941877506] [2020-10-27 01:15:28,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:28,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:15:28,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335955355] [2020-10-27 01:15:28,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:15:28,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:28,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:15:28,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:15:28,090 INFO L87 Difference]: Start difference. First operand 84 states and 120 transitions. Second operand 9 states. [2020-10-27 01:15:28,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:28,543 INFO L93 Difference]: Finished difference Result 110 states and 150 transitions. [2020-10-27 01:15:28,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:15:28,544 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-27 01:15:28,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:28,545 INFO L225 Difference]: With dead ends: 110 [2020-10-27 01:15:28,545 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 01:15:28,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:15:28,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 01:15:28,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2020-10-27 01:15:28,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 01:15:28,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 131 transitions. [2020-10-27 01:15:28,555 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 131 transitions. Word has length 37 [2020-10-27 01:15:28,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:28,555 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 131 transitions. [2020-10-27 01:15:28,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:15:28,555 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 131 transitions. [2020-10-27 01:15:28,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:15:28,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:28,557 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:28,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:15:28,557 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:28,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:28,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1180142727, now seen corresponding path program 1 times [2020-10-27 01:15:28,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:28,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763245293] [2020-10-27 01:15:28,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:28,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:28,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:28,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:28,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:28,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:15:28,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:15:28,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 400 [2020-10-27 01:15:28,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:28,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:15:28,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:15:28,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:15:28,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:29,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:29,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:29,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:29,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:29,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:29,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:29,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:15:29,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:29,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:29,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:29,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:29,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:29,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:29,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763245293] [2020-10-27 01:15:29,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:29,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:15:29,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202706331] [2020-10-27 01:15:29,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:15:29,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:29,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:15:29,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:15:29,170 INFO L87 Difference]: Start difference. First operand 93 states and 131 transitions. Second operand 9 states. [2020-10-27 01:15:29,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:29,672 INFO L93 Difference]: Finished difference Result 121 states and 164 transitions. [2020-10-27 01:15:29,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:15:29,673 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-27 01:15:29,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:29,674 INFO L225 Difference]: With dead ends: 121 [2020-10-27 01:15:29,674 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 01:15:29,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:15:29,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 01:15:29,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 102. [2020-10-27 01:15:29,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 01:15:29,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 142 transitions. [2020-10-27 01:15:29,698 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 142 transitions. Word has length 37 [2020-10-27 01:15:29,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:29,701 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 142 transitions. [2020-10-27 01:15:29,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:15:29,701 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 142 transitions. [2020-10-27 01:15:29,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:15:29,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:29,706 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:29,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:15:29,707 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:29,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:29,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1024899404, now seen corresponding path program 1 times [2020-10-27 01:15:29,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:29,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903748706] [2020-10-27 01:15:29,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:29,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:29,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:30,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:30,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:15:30,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:30,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-27 01:15:30,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:30,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:15:30,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:15:30,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:15:30,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:30,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:30,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:30,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:30,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:30,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:30,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:15:30,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:30,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:30,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:30,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:30,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:30,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903748706] [2020-10-27 01:15:30,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:30,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:15:30,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781464191] [2020-10-27 01:15:30,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:15:30,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:30,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:15:30,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:15:30,289 INFO L87 Difference]: Start difference. First operand 102 states and 142 transitions. Second operand 10 states. [2020-10-27 01:15:30,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:30,866 INFO L93 Difference]: Finished difference Result 123 states and 166 transitions. [2020-10-27 01:15:30,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:15:30,867 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-27 01:15:30,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:30,869 INFO L225 Difference]: With dead ends: 123 [2020-10-27 01:15:30,869 INFO L226 Difference]: Without dead ends: 117 [2020-10-27 01:15:30,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:15:30,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-27 01:15:30,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 106. [2020-10-27 01:15:30,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 01:15:30,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 147 transitions. [2020-10-27 01:15:30,880 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 147 transitions. Word has length 39 [2020-10-27 01:15:30,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:30,880 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 147 transitions. [2020-10-27 01:15:30,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:15:30,880 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 147 transitions. [2020-10-27 01:15:30,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:15:30,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:30,882 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:30,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:15:30,882 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:30,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:30,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1860219409, now seen corresponding path program 2 times [2020-10-27 01:15:30,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:30,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962846994] [2020-10-27 01:15:30,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:30,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:30,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:31,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:31,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:15:31,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:31,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 323 [2020-10-27 01:15:31,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:31,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:15:31,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:15:31,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:15:31,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:15:31,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:31,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:31,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:31,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:31,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:31,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:31,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:15:31,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:31,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:31,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:31,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:31,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:31,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962846994] [2020-10-27 01:15:31,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:31,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:15:31,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491239192] [2020-10-27 01:15:31,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:15:31,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:31,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:15:31,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:15:31,465 INFO L87 Difference]: Start difference. First operand 106 states and 147 transitions. Second operand 10 states. [2020-10-27 01:15:31,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:31,998 INFO L93 Difference]: Finished difference Result 125 states and 168 transitions. [2020-10-27 01:15:31,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:15:31,999 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-27 01:15:31,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:32,000 INFO L225 Difference]: With dead ends: 125 [2020-10-27 01:15:32,000 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 01:15:32,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:15:32,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 01:15:32,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 97. [2020-10-27 01:15:32,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 01:15:32,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 135 transitions. [2020-10-27 01:15:32,009 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 135 transitions. Word has length 41 [2020-10-27 01:15:32,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:32,009 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 135 transitions. [2020-10-27 01:15:32,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:15:32,009 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 135 transitions. [2020-10-27 01:15:32,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:15:32,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:32,011 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:32,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:15:32,011 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:32,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:32,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1865203217, now seen corresponding path program 1 times [2020-10-27 01:15:32,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:32,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [63705227] [2020-10-27 01:15:32,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:32,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:32,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:32,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:32,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:32,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:15:32,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:15:32,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 480 [2020-10-27 01:15:32,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:32,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:15:32,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:15:32,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:15:32,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:32,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:32,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:32,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:32,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:32,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:32,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:32,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:15:32,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:32,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:32,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:32,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:32,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:32,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [63705227] [2020-10-27 01:15:32,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:32,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:15:32,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794594476] [2020-10-27 01:15:32,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:15:32,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:32,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:15:32,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:15:32,690 INFO L87 Difference]: Start difference. First operand 97 states and 135 transitions. Second operand 10 states. [2020-10-27 01:15:33,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:33,235 INFO L93 Difference]: Finished difference Result 118 states and 159 transitions. [2020-10-27 01:15:33,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:15:33,238 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-27 01:15:33,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:33,239 INFO L225 Difference]: With dead ends: 118 [2020-10-27 01:15:33,239 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 01:15:33,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:15:33,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 01:15:33,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2020-10-27 01:15:33,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 01:15:33,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 129 transitions. [2020-10-27 01:15:33,251 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 129 transitions. Word has length 41 [2020-10-27 01:15:33,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:33,251 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 129 transitions. [2020-10-27 01:15:33,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:15:33,252 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 129 transitions. [2020-10-27 01:15:33,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:15:33,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:33,252 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, 1, 1, 1, 1, 1] [2020-10-27 01:15:33,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:15:33,253 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:33,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:33,255 INFO L82 PathProgramCache]: Analyzing trace with hash 791151008, now seen corresponding path program 2 times [2020-10-27 01:15:33,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:33,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047103892] [2020-10-27 01:15:33,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:33,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:33,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:33,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:33,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:15:33,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:33,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-10-27 01:15:33,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:33,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:15:33,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:15:33,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:15:33,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:33,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:33,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:33,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:33,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:33,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:33,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:33,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:15:33,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:33,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:33,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:33,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:33,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:33,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:33,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047103892] [2020-10-27 01:15:33,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:33,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:15:33,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906600248] [2020-10-27 01:15:33,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:15:33,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:33,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:15:33,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:15:33,779 INFO L87 Difference]: Start difference. First operand 92 states and 129 transitions. Second operand 11 states. [2020-10-27 01:15:34,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:34,250 INFO L93 Difference]: Finished difference Result 116 states and 157 transitions. [2020-10-27 01:15:34,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:15:34,251 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-10-27 01:15:34,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:34,253 INFO L225 Difference]: With dead ends: 116 [2020-10-27 01:15:34,253 INFO L226 Difference]: Without dead ends: 110 [2020-10-27 01:15:34,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:15:34,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-27 01:15:34,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2020-10-27 01:15:34,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-27 01:15:34,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 142 transitions. [2020-10-27 01:15:34,261 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 142 transitions. Word has length 41 [2020-10-27 01:15:34,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:34,261 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 142 transitions. [2020-10-27 01:15:34,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:15:34,262 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 142 transitions. [2020-10-27 01:15:34,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:15:34,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:34,263 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:34,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:15:34,263 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:34,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:34,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1041918048, now seen corresponding path program 1 times [2020-10-27 01:15:34,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:34,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441480244] [2020-10-27 01:15:34,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:34,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:34,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:34,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:15:34,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:34,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-27 01:15:34,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:34,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:15:34,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:15:34,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:15:34,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:34,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:34,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:34,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:34,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:34,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:34,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:15:34,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:34,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:34,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:34,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:34,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:34,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:34,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441480244] [2020-10-27 01:15:34,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:34,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:15:34,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313921193] [2020-10-27 01:15:34,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:15:34,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:34,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:15:34,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:15:34,986 INFO L87 Difference]: Start difference. First operand 103 states and 142 transitions. Second operand 11 states. [2020-10-27 01:15:35,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:35,460 INFO L93 Difference]: Finished difference Result 113 states and 153 transitions. [2020-10-27 01:15:35,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:15:35,460 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-10-27 01:15:35,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:35,462 INFO L225 Difference]: With dead ends: 113 [2020-10-27 01:15:35,462 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 01:15:35,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:15:35,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 01:15:35,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-10-27 01:15:35,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 01:15:35,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 144 transitions. [2020-10-27 01:15:35,472 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 144 transitions. Word has length 41 [2020-10-27 01:15:35,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:35,472 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 144 transitions. [2020-10-27 01:15:35,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:15:35,473 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 144 transitions. [2020-10-27 01:15:35,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:15:35,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:35,474 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:35,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:15:35,474 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:35,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:35,475 INFO L82 PathProgramCache]: Analyzing trace with hash -392495653, now seen corresponding path program 3 times [2020-10-27 01:15:35,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:35,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847068121] [2020-10-27 01:15:35,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:35,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:35,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:35,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:35,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 01:15:35,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:35,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-10-27 01:15:35,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:35,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:15:35,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:15:35,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:15:35,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:36,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:36,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:36,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:36,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:36,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:36,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:15:36,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:36,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:36,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:36,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:36,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:36,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847068121] [2020-10-27 01:15:36,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:36,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:15:36,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403701547] [2020-10-27 01:15:36,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:15:36,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:36,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:15:36,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:15:36,204 INFO L87 Difference]: Start difference. First operand 105 states and 144 transitions. Second operand 12 states. [2020-10-27 01:15:37,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:37,010 INFO L93 Difference]: Finished difference Result 137 states and 180 transitions. [2020-10-27 01:15:37,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:15:37,011 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-27 01:15:37,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:37,013 INFO L225 Difference]: With dead ends: 137 [2020-10-27 01:15:37,013 INFO L226 Difference]: Without dead ends: 131 [2020-10-27 01:15:37,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:15:37,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-27 01:15:37,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 121. [2020-10-27 01:15:37,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 01:15:37,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 163 transitions. [2020-10-27 01:15:37,025 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 163 transitions. Word has length 43 [2020-10-27 01:15:37,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:37,026 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 163 transitions. [2020-10-27 01:15:37,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:15:37,026 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 163 transitions. [2020-10-27 01:15:37,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:15:37,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:37,027 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:37,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:15:37,028 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:37,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:37,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1568212315, now seen corresponding path program 1 times [2020-10-27 01:15:37,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:37,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635279477] [2020-10-27 01:15:37,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:37,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:37,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:37,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 01:15:37,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:37,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 455 [2020-10-27 01:15:37,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:37,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:15:37,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:15:37,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:15:37,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:15:37,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:37,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:37,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:37,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:37,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:37,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:15:37,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:37,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:37,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:37,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:37,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:37,876 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:37,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635279477] [2020-10-27 01:15:37,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:37,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:15:37,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163300640] [2020-10-27 01:15:37,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:15:37,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:37,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:15:37,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:15:37,881 INFO L87 Difference]: Start difference. First operand 121 states and 163 transitions. Second operand 12 states. [2020-10-27 01:15:38,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:38,687 INFO L93 Difference]: Finished difference Result 148 states and 194 transitions. [2020-10-27 01:15:38,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:15:38,688 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-27 01:15:38,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:38,690 INFO L225 Difference]: With dead ends: 148 [2020-10-27 01:15:38,690 INFO L226 Difference]: Without dead ends: 140 [2020-10-27 01:15:38,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:15:38,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-27 01:15:38,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 130. [2020-10-27 01:15:38,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-27 01:15:38,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 174 transitions. [2020-10-27 01:15:38,704 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 174 transitions. Word has length 43 [2020-10-27 01:15:38,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:38,704 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 174 transitions. [2020-10-27 01:15:38,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:15:38,705 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 174 transitions. [2020-10-27 01:15:38,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:15:38,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:38,706 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:38,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:15:38,706 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:38,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:38,709 INFO L82 PathProgramCache]: Analyzing trace with hash 289396566, now seen corresponding path program 4 times [2020-10-27 01:15:38,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:38,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857107275] [2020-10-27 01:15:38,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:38,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:39,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:39,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:15:39,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:39,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 466 [2020-10-27 01:15:39,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:39,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:15:39,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:15:39,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:15:39,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:39,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:39,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:39,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:39,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:39,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:39,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:39,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:15:39,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:39,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:39,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:39,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:39,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:15:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:39,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857107275] [2020-10-27 01:15:39,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:39,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:15:39,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640126165] [2020-10-27 01:15:39,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:15:39,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:39,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:15:39,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:15:39,685 INFO L87 Difference]: Start difference. First operand 130 states and 174 transitions. Second operand 13 states. [2020-10-27 01:15:40,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:40,795 INFO L93 Difference]: Finished difference Result 152 states and 198 transitions. [2020-10-27 01:15:40,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:15:40,797 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-10-27 01:15:40,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:40,799 INFO L225 Difference]: With dead ends: 152 [2020-10-27 01:15:40,799 INFO L226 Difference]: Without dead ends: 146 [2020-10-27 01:15:40,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:15:40,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-27 01:15:40,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 136. [2020-10-27 01:15:40,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-27 01:15:40,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 181 transitions. [2020-10-27 01:15:40,811 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 181 transitions. Word has length 45 [2020-10-27 01:15:40,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:40,812 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 181 transitions. [2020-10-27 01:15:40,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:15:40,812 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 181 transitions. [2020-10-27 01:15:40,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:15:40,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:40,813 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:40,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:15:40,813 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:40,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:40,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1542177263, now seen corresponding path program 5 times [2020-10-27 01:15:40,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:40,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785287250] [2020-10-27 01:15:40,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:40,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:40,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:41,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:41,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:15:41,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:41,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 539 [2020-10-27 01:15:41,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:41,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:15:41,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:15:41,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:15:41,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:41,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:41,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:41,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:41,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:41,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:41,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:15:41,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:41,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:41,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:41,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:41,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:41,995 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:41,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785287250] [2020-10-27 01:15:41,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:41,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:15:41,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574267758] [2020-10-27 01:15:41,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:15:41,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:42,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:15:42,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:15:42,003 INFO L87 Difference]: Start difference. First operand 136 states and 181 transitions. Second operand 13 states. [2020-10-27 01:15:42,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:42,939 INFO L93 Difference]: Finished difference Result 154 states and 200 transitions. [2020-10-27 01:15:42,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:15:42,939 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-10-27 01:15:42,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:42,941 INFO L225 Difference]: With dead ends: 154 [2020-10-27 01:15:42,941 INFO L226 Difference]: Without dead ends: 140 [2020-10-27 01:15:42,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:15:42,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-27 01:15:42,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 122. [2020-10-27 01:15:42,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 01:15:42,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 164 transitions. [2020-10-27 01:15:42,964 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 164 transitions. Word has length 47 [2020-10-27 01:15:42,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:42,964 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 164 transitions. [2020-10-27 01:15:42,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:15:42,965 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 164 transitions. [2020-10-27 01:15:42,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:15:42,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:42,967 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:42,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:15:42,967 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:42,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:42,968 INFO L82 PathProgramCache]: Analyzing trace with hash -844600303, now seen corresponding path program 2 times [2020-10-27 01:15:42,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:42,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809400241] [2020-10-27 01:15:42,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:43,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:43,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:43,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:43,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:44,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:45,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:45,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:15:45,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:15:45,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2883 [2020-10-27 01:15:45,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:45,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:15:45,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:15:45,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:15:45,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:46,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:46,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:46,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:46,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:46,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:46,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:46,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:15:46,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:46,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:46,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:46,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:46,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:15:46,224 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:15:46,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809400241] [2020-10-27 01:15:46,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:46,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:15:46,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342634716] [2020-10-27 01:15:46,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:15:46,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:46,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:15:46,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:15:46,232 INFO L87 Difference]: Start difference. First operand 122 states and 164 transitions. Second operand 12 states. [2020-10-27 01:15:46,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:46,919 INFO L93 Difference]: Finished difference Result 147 states and 191 transitions. [2020-10-27 01:15:46,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:15:46,919 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-27 01:15:46,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:46,921 INFO L225 Difference]: With dead ends: 147 [2020-10-27 01:15:46,921 INFO L226 Difference]: Without dead ends: 130 [2020-10-27 01:15:46,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:15:46,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-27 01:15:46,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2020-10-27 01:15:46,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-27 01:15:46,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 165 transitions. [2020-10-27 01:15:46,933 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 165 transitions. Word has length 47 [2020-10-27 01:15:46,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:46,933 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 165 transitions. [2020-10-27 01:15:46,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:15:46,933 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 165 transitions. [2020-10-27 01:15:46,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:15:46,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:46,934 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:46,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:15:46,935 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:46,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:46,935 INFO L82 PathProgramCache]: Analyzing trace with hash -490813054, now seen corresponding path program 6 times [2020-10-27 01:15:46,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:46,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539096157] [2020-10-27 01:15:46,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:46,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:47,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:47,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:15:47,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:47,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 590 [2020-10-27 01:15:47,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:47,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:15:47,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:15:47,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:15:47,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:48,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:48,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:48,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:48,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:48,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:48,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:15:48,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:48,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:48,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:48,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:48,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:48,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539096157] [2020-10-27 01:15:48,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:48,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:15:48,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815226967] [2020-10-27 01:15:48,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:15:48,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:48,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:15:48,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:15:48,040 INFO L87 Difference]: Start difference. First operand 124 states and 165 transitions. Second operand 14 states. [2020-10-27 01:15:48,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:48,941 INFO L93 Difference]: Finished difference Result 143 states and 186 transitions. [2020-10-27 01:15:48,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:15:48,942 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-10-27 01:15:48,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:48,943 INFO L225 Difference]: With dead ends: 143 [2020-10-27 01:15:48,943 INFO L226 Difference]: Without dead ends: 137 [2020-10-27 01:15:48,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:15:48,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-27 01:15:48,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2020-10-27 01:15:48,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-27 01:15:48,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 178 transitions. [2020-10-27 01:15:48,966 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 178 transitions. Word has length 47 [2020-10-27 01:15:48,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:48,967 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 178 transitions. [2020-10-27 01:15:48,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:15:48,967 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 178 transitions. [2020-10-27 01:15:48,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:15:48,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:48,969 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:48,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:15:48,970 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:48,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:48,970 INFO L82 PathProgramCache]: Analyzing trace with hash -480872047, now seen corresponding path program 2 times [2020-10-27 01:15:48,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:48,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186174890] [2020-10-27 01:15:48,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:48,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:49,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:49,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:49,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:15:49,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:49,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 403 [2020-10-27 01:15:49,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:49,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:15:49,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:15:49,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:15:49,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:49,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:49,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:49,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:49,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:49,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:49,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:15:49,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:49,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:49,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:49,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:49,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:49,791 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:49,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186174890] [2020-10-27 01:15:49,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:49,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:15:49,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069060153] [2020-10-27 01:15:49,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:15:49,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:49,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:15:49,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:15:49,794 INFO L87 Difference]: Start difference. First operand 135 states and 178 transitions. Second operand 13 states. [2020-10-27 01:15:50,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:50,740 INFO L93 Difference]: Finished difference Result 155 states and 199 transitions. [2020-10-27 01:15:50,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:15:50,740 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-10-27 01:15:50,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:50,741 INFO L225 Difference]: With dead ends: 155 [2020-10-27 01:15:50,742 INFO L226 Difference]: Without dead ends: 138 [2020-10-27 01:15:50,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:15:50,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-27 01:15:50,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 130. [2020-10-27 01:15:50,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-27 01:15:50,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 172 transitions. [2020-10-27 01:15:50,753 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 172 transitions. Word has length 47 [2020-10-27 01:15:50,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:50,755 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 172 transitions. [2020-10-27 01:15:50,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:15:50,755 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 172 transitions. [2020-10-27 01:15:50,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:15:50,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:50,756 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:50,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:15:50,756 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:50,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:50,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1064964354, now seen corresponding path program 1 times [2020-10-27 01:15:50,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:50,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909865687] [2020-10-27 01:15:50,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:50,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:51,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:51,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:15:51,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:51,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 539 [2020-10-27 01:15:51,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:51,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:15:51,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:15:51,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:15:51,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:15:51,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:51,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:51,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:51,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:51,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:51,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:51,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:15:51,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:51,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:51,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:51,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:51,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:51,715 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:51,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909865687] [2020-10-27 01:15:51,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:51,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:15:51,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713990706] [2020-10-27 01:15:51,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:15:51,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:51,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:15:51,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:15:51,718 INFO L87 Difference]: Start difference. First operand 130 states and 172 transitions. Second operand 14 states. [2020-10-27 01:15:52,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:52,786 INFO L93 Difference]: Finished difference Result 140 states and 183 transitions. [2020-10-27 01:15:52,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:15:52,787 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-10-27 01:15:52,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:52,788 INFO L225 Difference]: With dead ends: 140 [2020-10-27 01:15:52,788 INFO L226 Difference]: Without dead ends: 132 [2020-10-27 01:15:52,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:15:52,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-27 01:15:52,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-10-27 01:15:52,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 01:15:52,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 174 transitions. [2020-10-27 01:15:52,807 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 174 transitions. Word has length 47 [2020-10-27 01:15:52,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:52,807 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 174 transitions. [2020-10-27 01:15:52,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:15:52,807 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 174 transitions. [2020-10-27 01:15:52,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:15:52,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:52,810 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:52,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:15:52,811 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:52,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:52,811 INFO L82 PathProgramCache]: Analyzing trace with hash 295654717, now seen corresponding path program 7 times [2020-10-27 01:15:52,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:52,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176768414] [2020-10-27 01:15:52,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:52,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:53,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:53,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:15:53,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:53,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 652 [2020-10-27 01:15:53,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:53,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:15:53,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:15:53,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:15:53,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:54,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:54,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:54,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:54,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:54,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:54,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:15:54,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:54,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:54,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:54,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:54,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:54,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176768414] [2020-10-27 01:15:54,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:54,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:15:54,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089543385] [2020-10-27 01:15:54,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:15:54,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:54,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:15:54,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:15:54,147 INFO L87 Difference]: Start difference. First operand 132 states and 174 transitions. Second operand 15 states. [2020-10-27 01:15:54,959 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-27 01:15:55,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:55,484 INFO L93 Difference]: Finished difference Result 179 states and 227 transitions. [2020-10-27 01:15:55,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:15:55,487 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-10-27 01:15:55,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:55,489 INFO L225 Difference]: With dead ends: 179 [2020-10-27 01:15:55,489 INFO L226 Difference]: Without dead ends: 173 [2020-10-27 01:15:55,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:15:55,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-27 01:15:55,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 155. [2020-10-27 01:15:55,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-27 01:15:55,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 201 transitions. [2020-10-27 01:15:55,500 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 201 transitions. Word has length 49 [2020-10-27 01:15:55,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:55,501 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 201 transitions. [2020-10-27 01:15:55,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:15:55,501 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 201 transitions. [2020-10-27 01:15:55,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:15:55,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:55,502 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:55,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:15:55,503 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:55,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:55,503 INFO L82 PathProgramCache]: Analyzing trace with hash -2103026307, now seen corresponding path program 3 times [2020-10-27 01:15:55,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:55,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984275029] [2020-10-27 01:15:55,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:55,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:56,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:56,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:15:56,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:56,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 544 [2020-10-27 01:15:56,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:56,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:15:56,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:15:56,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:15:56,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:56,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:56,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:56,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:56,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:56,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:56,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:15:56,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:56,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:56,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:56,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:56,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:56,627 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:56,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984275029] [2020-10-27 01:15:56,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:56,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:15:56,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494907412] [2020-10-27 01:15:56,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:15:56,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:56,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:15:56,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:15:56,638 INFO L87 Difference]: Start difference. First operand 155 states and 201 transitions. Second operand 15 states. [2020-10-27 01:15:58,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:58,171 INFO L93 Difference]: Finished difference Result 186 states and 236 transitions. [2020-10-27 01:15:58,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:15:58,172 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-10-27 01:15:58,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:58,174 INFO L225 Difference]: With dead ends: 186 [2020-10-27 01:15:58,174 INFO L226 Difference]: Without dead ends: 178 [2020-10-27 01:15:58,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:15:58,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-27 01:15:58,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 164. [2020-10-27 01:15:58,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-27 01:15:58,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 212 transitions. [2020-10-27 01:15:58,187 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 212 transitions. Word has length 49 [2020-10-27 01:15:58,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:58,187 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 212 transitions. [2020-10-27 01:15:58,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:15:58,188 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 212 transitions. [2020-10-27 01:15:58,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:15:58,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:58,189 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:58,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:15:58,189 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:58,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:58,190 INFO L82 PathProgramCache]: Analyzing trace with hash 176938552, now seen corresponding path program 8 times [2020-10-27 01:15:58,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:58,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931135329] [2020-10-27 01:15:58,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:58,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:58,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:58,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:58,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 01:15:58,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:58,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 655 [2020-10-27 01:15:58,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:58,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:15:58,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:15:58,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:15:58,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:59,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:59,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:59,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:59,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:59,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:59,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:59,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:15:59,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:59,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:59,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:59,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:59,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:59,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931135329] [2020-10-27 01:15:59,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:59,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:15:59,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777894704] [2020-10-27 01:15:59,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:15:59,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:59,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:15:59,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:15:59,630 INFO L87 Difference]: Start difference. First operand 164 states and 212 transitions. Second operand 16 states. [2020-10-27 01:16:00,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:00,876 INFO L93 Difference]: Finished difference Result 196 states and 247 transitions. [2020-10-27 01:16:00,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:16:00,876 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-10-27 01:16:00,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:00,878 INFO L225 Difference]: With dead ends: 196 [2020-10-27 01:16:00,878 INFO L226 Difference]: Without dead ends: 190 [2020-10-27 01:16:00,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:16:00,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-27 01:16:00,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 172. [2020-10-27 01:16:00,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-27 01:16:00,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 221 transitions. [2020-10-27 01:16:00,892 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 221 transitions. Word has length 51 [2020-10-27 01:16:00,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:00,892 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 221 transitions. [2020-10-27 01:16:00,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:16:00,892 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 221 transitions. [2020-10-27 01:16:00,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 01:16:00,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:00,893 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:16:00,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:16:00,894 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:00,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:00,894 INFO L82 PathProgramCache]: Analyzing trace with hash 2054820979, now seen corresponding path program 9 times [2020-10-27 01:16:00,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:00,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135979783] [2020-10-27 01:16:00,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:00,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:00,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:01,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:01,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 01:16:01,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:01,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 635 [2020-10-27 01:16:01,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:01,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:16:01,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:16:01,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:16:01,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:02,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:02,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:02,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:02,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:02,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:02,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:02,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:16:02,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:02,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:02,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:02,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:02,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:02,184 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:16:02,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135979783] [2020-10-27 01:16:02,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:02,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:16:02,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407330792] [2020-10-27 01:16:02,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:16:02,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:02,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:16:02,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:16:02,187 INFO L87 Difference]: Start difference. First operand 172 states and 221 transitions. Second operand 16 states. [2020-10-27 01:16:02,803 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-10-27 01:16:03,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:03,442 INFO L93 Difference]: Finished difference Result 198 states and 249 transitions. [2020-10-27 01:16:03,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:16:03,443 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-10-27 01:16:03,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:03,444 INFO L225 Difference]: With dead ends: 198 [2020-10-27 01:16:03,444 INFO L226 Difference]: Without dead ends: 182 [2020-10-27 01:16:03,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:16:03,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-27 01:16:03,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 153. [2020-10-27 01:16:03,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-27 01:16:03,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 199 transitions. [2020-10-27 01:16:03,458 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 199 transitions. Word has length 53 [2020-10-27 01:16:03,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:03,458 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 199 transitions. [2020-10-27 01:16:03,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:16:03,458 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 199 transitions. [2020-10-27 01:16:03,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 01:16:03,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:03,459 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:16:03,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:16:03,460 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:03,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:03,460 INFO L82 PathProgramCache]: Analyzing trace with hash -691536781, now seen corresponding path program 3 times [2020-10-27 01:16:03,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:03,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663745091] [2020-10-27 01:16:03,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:03,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:03,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:03,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:04,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:05,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:05,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:05,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:08,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:08,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 01:16:08,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:16:08,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 01:16:08,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:08,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:16:08,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:16:08,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:16:08,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:08,897 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-10-27 01:16:09,027 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2020-10-27 01:16:09,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:09,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:09,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:09,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:09,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:09,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:16:09,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:09,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:09,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:09,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:09,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:09,364 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:16:09,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663745091] [2020-10-27 01:16:09,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:09,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:16:09,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076542181] [2020-10-27 01:16:09,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:16:09,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:09,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:16:09,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:16:09,368 INFO L87 Difference]: Start difference. First operand 153 states and 199 transitions. Second operand 16 states. [2020-10-27 01:16:10,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:10,908 INFO L93 Difference]: Finished difference Result 175 states and 222 transitions. [2020-10-27 01:16:10,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:16:10,908 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-10-27 01:16:10,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:10,910 INFO L225 Difference]: With dead ends: 175 [2020-10-27 01:16:10,910 INFO L226 Difference]: Without dead ends: 156 [2020-10-27 01:16:10,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:16:10,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-27 01:16:10,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 148. [2020-10-27 01:16:10,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-27 01:16:10,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 191 transitions. [2020-10-27 01:16:10,922 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 191 transitions. Word has length 53 [2020-10-27 01:16:10,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:10,922 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 191 transitions. [2020-10-27 01:16:10,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:16:10,922 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 191 transitions. [2020-10-27 01:16:10,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 01:16:10,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:10,923 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:16:10,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:16:10,923 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:10,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:10,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1196456028, now seen corresponding path program 10 times [2020-10-27 01:16:10,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:10,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209687952] [2020-10-27 01:16:10,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:10,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:11,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:11,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 01:16:11,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:11,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 533 [2020-10-27 01:16:11,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:11,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:16:11,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:16:11,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:16:11,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:12,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:12,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:12,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:12,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:12,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:12,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:12,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:16:12,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:12,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:12,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:12,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:12,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:12,253 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:16:12,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209687952] [2020-10-27 01:16:12,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:12,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:16:12,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660641267] [2020-10-27 01:16:12,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:16:12,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:12,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:16:12,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:16:12,255 INFO L87 Difference]: Start difference. First operand 148 states and 191 transitions. Second operand 17 states. [2020-10-27 01:16:13,143 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-10-27 01:16:13,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:13,526 INFO L93 Difference]: Finished difference Result 169 states and 214 transitions. [2020-10-27 01:16:13,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:16:13,526 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2020-10-27 01:16:13,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:13,528 INFO L225 Difference]: With dead ends: 169 [2020-10-27 01:16:13,529 INFO L226 Difference]: Without dead ends: 163 [2020-10-27 01:16:13,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:16:13,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-27 01:16:13,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2020-10-27 01:16:13,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-27 01:16:13,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 208 transitions. [2020-10-27 01:16:13,540 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 208 transitions. Word has length 53 [2020-10-27 01:16:13,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:13,540 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 208 transitions. [2020-10-27 01:16:13,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:16:13,541 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 208 transitions. [2020-10-27 01:16:13,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 01:16:13,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:13,542 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:16:13,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:16:13,542 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:13,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:13,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1704095716, now seen corresponding path program 2 times [2020-10-27 01:16:13,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:13,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074276716] [2020-10-27 01:16:13,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:13,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:13,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:14,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:14,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 01:16:14,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:14,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 610 [2020-10-27 01:16:14,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:14,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:16:14,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:16:14,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:16:14,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:14,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:14,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:14,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:14,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:14,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:14,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:14,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:16:14,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:14,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:14,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:14,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:14,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:15,006 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:16:15,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074276716] [2020-10-27 01:16:15,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:15,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:16:15,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911515169] [2020-10-27 01:16:15,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:16:15,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:15,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:16:15,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:16:15,008 INFO L87 Difference]: Start difference. First operand 163 states and 208 transitions. Second operand 17 states. [2020-10-27 01:16:16,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:16,598 INFO L93 Difference]: Finished difference Result 173 states and 219 transitions. [2020-10-27 01:16:16,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:16:16,599 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2020-10-27 01:16:16,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:16,601 INFO L225 Difference]: With dead ends: 173 [2020-10-27 01:16:16,601 INFO L226 Difference]: Without dead ends: 165 [2020-10-27 01:16:16,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:16:16,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-27 01:16:16,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2020-10-27 01:16:16,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-27 01:16:16,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 210 transitions. [2020-10-27 01:16:16,616 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 210 transitions. Word has length 53 [2020-10-27 01:16:16,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:16,617 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 210 transitions. [2020-10-27 01:16:16,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:16:16,617 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 210 transitions. [2020-10-27 01:16:16,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 01:16:16,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:16,618 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:16:16,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:16:16,618 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:16,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:16,619 INFO L82 PathProgramCache]: Analyzing trace with hash 777589471, now seen corresponding path program 11 times [2020-10-27 01:16:16,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:16,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564980014] [2020-10-27 01:16:16,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:16,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:17,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:17,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 01:16:17,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:17,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 669 [2020-10-27 01:16:17,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:17,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:16:17,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:16:17,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:16:17,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:17,833 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-27 01:16:17,998 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-27 01:16:18,191 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-10-27 01:16:18,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:18,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:18,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:18,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:18,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:18,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:18,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:16:18,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:18,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:18,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:18,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:18,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:18,571 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:16:18,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564980014] [2020-10-27 01:16:18,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:18,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:16:18,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264499000] [2020-10-27 01:16:18,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:16:18,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:18,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:16:18,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:16:18,574 INFO L87 Difference]: Start difference. First operand 165 states and 210 transitions. Second operand 18 states. [2020-10-27 01:16:19,966 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-27 01:16:20,363 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2020-10-27 01:16:21,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:21,106 INFO L93 Difference]: Finished difference Result 229 states and 282 transitions. [2020-10-27 01:16:21,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:16:21,106 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2020-10-27 01:16:21,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:21,109 INFO L225 Difference]: With dead ends: 229 [2020-10-27 01:16:21,109 INFO L226 Difference]: Without dead ends: 223 [2020-10-27 01:16:21,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:16:21,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-27 01:16:21,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 195. [2020-10-27 01:16:21,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-27 01:16:21,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 245 transitions. [2020-10-27 01:16:21,124 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 245 transitions. Word has length 55 [2020-10-27 01:16:21,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:21,124 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 245 transitions. [2020-10-27 01:16:21,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:16:21,125 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 245 transitions. [2020-10-27 01:16:21,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 01:16:21,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:21,126 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:16:21,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:16:21,126 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:21,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:21,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1859920929, now seen corresponding path program 4 times [2020-10-27 01:16:21,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:21,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081355821] [2020-10-27 01:16:21,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:21,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:21,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:21,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 01:16:21,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:21,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 702 [2020-10-27 01:16:21,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:21,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:16:21,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:16:21,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:16:21,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:22,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:22,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:22,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:22,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:22,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:22,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:16:22,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:22,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:22,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:22,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:22,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:22,887 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:16:22,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081355821] [2020-10-27 01:16:22,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:22,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:16:22,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852452692] [2020-10-27 01:16:22,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:16:22,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:22,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:16:22,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:16:22,889 INFO L87 Difference]: Start difference. First operand 195 states and 245 transitions. Second operand 18 states. [2020-10-27 01:16:23,782 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-10-27 01:16:23,955 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-10-27 01:16:24,286 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2020-10-27 01:16:25,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:25,031 INFO L93 Difference]: Finished difference Result 230 states and 284 transitions. [2020-10-27 01:16:25,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:16:25,031 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2020-10-27 01:16:25,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:25,034 INFO L225 Difference]: With dead ends: 230 [2020-10-27 01:16:25,034 INFO L226 Difference]: Without dead ends: 222 [2020-10-27 01:16:25,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:16:25,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-27 01:16:25,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 204. [2020-10-27 01:16:25,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-27 01:16:25,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 256 transitions. [2020-10-27 01:16:25,049 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 256 transitions. Word has length 55 [2020-10-27 01:16:25,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:25,049 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 256 transitions. [2020-10-27 01:16:25,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:16:25,049 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 256 transitions. [2020-10-27 01:16:25,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 01:16:25,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:25,051 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:16:25,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:16:25,051 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:25,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:25,052 INFO L82 PathProgramCache]: Analyzing trace with hash -540230822, now seen corresponding path program 12 times [2020-10-27 01:16:25,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:25,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127342685] [2020-10-27 01:16:25,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:25,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:26,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:26,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 01:16:26,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:26,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1021 [2020-10-27 01:16:26,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:26,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:16:26,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:16:26,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:16:26,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:26,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:26,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:26,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:26,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:26,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:26,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:26,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:16:26,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:26,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:26,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:26,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:26,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:26,948 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:16:26,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127342685] [2020-10-27 01:16:26,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:26,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:16:26,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184382370] [2020-10-27 01:16:26,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:16:26,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:26,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:16:26,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:16:26,950 INFO L87 Difference]: Start difference. First operand 204 states and 256 transitions. Second operand 19 states. [2020-10-27 01:16:27,917 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-10-27 01:16:28,342 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-10-27 01:16:29,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:29,379 INFO L93 Difference]: Finished difference Result 248 states and 304 transitions. [2020-10-27 01:16:29,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:16:29,380 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 57 [2020-10-27 01:16:29,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:29,381 INFO L225 Difference]: With dead ends: 248 [2020-10-27 01:16:29,381 INFO L226 Difference]: Without dead ends: 242 [2020-10-27 01:16:29,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:16:29,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-27 01:16:29,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 214. [2020-10-27 01:16:29,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-27 01:16:29,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 267 transitions. [2020-10-27 01:16:29,402 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 267 transitions. Word has length 57 [2020-10-27 01:16:29,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:29,402 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 267 transitions. [2020-10-27 01:16:29,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:16:29,402 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 267 transitions. [2020-10-27 01:16:29,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 01:16:29,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:29,404 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:16:29,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:16:29,404 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:29,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:29,405 INFO L82 PathProgramCache]: Analyzing trace with hash 49819925, now seen corresponding path program 13 times [2020-10-27 01:16:29,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:29,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242637721] [2020-10-27 01:16:29,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:29,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:30,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:30,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:16:30,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:30,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 877 [2020-10-27 01:16:30,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:30,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:16:30,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:16:30,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:16:30,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:30,893 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-27 01:16:31,014 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-10-27 01:16:31,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:31,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:31,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:31,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:31,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:31,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:31,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:16:31,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:31,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:31,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:31,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:31,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:31,516 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:16:31,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242637721] [2020-10-27 01:16:31,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:31,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:16:31,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582948883] [2020-10-27 01:16:31,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:16:31,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:31,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:16:31,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:16:31,518 INFO L87 Difference]: Start difference. First operand 214 states and 267 transitions. Second operand 19 states. [2020-10-27 01:16:32,372 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-27 01:16:33,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:33,235 INFO L93 Difference]: Finished difference Result 250 states and 306 transitions. [2020-10-27 01:16:33,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:16:33,236 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 59 [2020-10-27 01:16:33,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:33,239 INFO L225 Difference]: With dead ends: 250 [2020-10-27 01:16:33,239 INFO L226 Difference]: Without dead ends: 232 [2020-10-27 01:16:33,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:16:33,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-27 01:16:33,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 190. [2020-10-27 01:16:33,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-27 01:16:33,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 240 transitions. [2020-10-27 01:16:33,254 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 240 transitions. Word has length 59 [2020-10-27 01:16:33,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:33,255 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 240 transitions. [2020-10-27 01:16:33,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:16:33,255 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 240 transitions. [2020-10-27 01:16:33,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 01:16:33,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:33,256 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:16:33,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:16:33,256 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:33,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:33,257 INFO L82 PathProgramCache]: Analyzing trace with hash -898018539, now seen corresponding path program 4 times [2020-10-27 01:16:33,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:33,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181595596] [2020-10-27 01:16:33,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:33,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:33,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:33,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:33,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:34,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:36,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:37,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:37,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:37,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:38,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:38,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:16:38,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 01:16:38,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 01:16:38,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:38,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:16:38,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:16:38,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:16:38,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:38,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:38,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:38,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:38,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:38,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:38,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:38,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:16:38,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:38,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:38,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:38,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:38,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:38,969 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-27 01:16:38,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181595596] [2020-10-27 01:16:38,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:38,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:16:38,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968423015] [2020-10-27 01:16:38,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:16:38,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:38,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:16:38,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:16:38,971 INFO L87 Difference]: Start difference. First operand 190 states and 240 transitions. Second operand 16 states. [2020-10-27 01:16:40,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:40,188 INFO L93 Difference]: Finished difference Result 217 states and 269 transitions. [2020-10-27 01:16:40,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:16:40,193 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 59 [2020-10-27 01:16:40,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:40,195 INFO L225 Difference]: With dead ends: 217 [2020-10-27 01:16:40,195 INFO L226 Difference]: Without dead ends: 192 [2020-10-27 01:16:40,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:16:40,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-27 01:16:40,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2020-10-27 01:16:40,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-27 01:16:40,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 237 transitions. [2020-10-27 01:16:40,208 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 237 transitions. Word has length 59 [2020-10-27 01:16:40,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:40,208 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 237 transitions. [2020-10-27 01:16:40,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:16:40,208 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 237 transitions. [2020-10-27 01:16:40,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 01:16:40,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:40,210 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:16:40,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:16:40,210 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:40,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:40,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1986159610, now seen corresponding path program 14 times [2020-10-27 01:16:40,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:40,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716825952] [2020-10-27 01:16:40,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:40,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:41,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:41,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:16:41,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:41,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 871 [2020-10-27 01:16:41,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:41,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:16:41,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:16:41,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:16:41,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:41,500 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-10-27 01:16:41,673 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2020-10-27 01:16:41,889 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-10-27 01:16:42,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:42,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:42,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:42,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:42,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:42,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:42,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:16:42,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:42,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:42,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:42,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:42,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:16:42,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716825952] [2020-10-27 01:16:42,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:42,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:16:42,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537811729] [2020-10-27 01:16:42,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:16:42,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:42,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:16:42,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:16:42,370 INFO L87 Difference]: Start difference. First operand 190 states and 237 transitions. Second operand 20 states. [2020-10-27 01:16:43,424 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2020-10-27 01:16:43,616 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2020-10-27 01:16:44,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:44,213 INFO L93 Difference]: Finished difference Result 224 states and 274 transitions. [2020-10-27 01:16:44,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:16:44,213 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-10-27 01:16:44,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:44,216 INFO L225 Difference]: With dead ends: 224 [2020-10-27 01:16:44,216 INFO L226 Difference]: Without dead ends: 218 [2020-10-27 01:16:44,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:16:44,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-27 01:16:44,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 207. [2020-10-27 01:16:44,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-27 01:16:44,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 257 transitions. [2020-10-27 01:16:44,231 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 257 transitions. Word has length 59 [2020-10-27 01:16:44,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:44,231 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 257 transitions. [2020-10-27 01:16:44,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:16:44,232 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 257 transitions. [2020-10-27 01:16:44,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 01:16:44,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:44,233 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:16:44,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:16:44,233 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:44,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:44,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1275125611, now seen corresponding path program 3 times [2020-10-27 01:16:44,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:44,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711526650] [2020-10-27 01:16:44,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:44,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:44,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:44,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:47,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:47,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:16:47,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:16:47,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2972 [2020-10-27 01:16:47,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:47,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:16:47,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:16:47,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:16:47,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:47,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:47,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:47,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:47,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:47,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:47,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:47,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:16:47,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:47,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:47,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:47,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:47,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:47,996 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 01:16:47,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711526650] [2020-10-27 01:16:47,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:47,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:16:47,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908890290] [2020-10-27 01:16:47,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:16:47,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:47,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:16:47,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:16:47,998 INFO L87 Difference]: Start difference. First operand 207 states and 257 transitions. Second operand 17 states. [2020-10-27 01:16:49,041 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-10-27 01:16:49,759 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-27 01:16:50,143 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-10-27 01:16:50,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:50,677 INFO L93 Difference]: Finished difference Result 236 states and 287 transitions. [2020-10-27 01:16:50,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:16:50,678 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2020-10-27 01:16:50,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:50,680 INFO L225 Difference]: With dead ends: 236 [2020-10-27 01:16:50,681 INFO L226 Difference]: Without dead ends: 215 [2020-10-27 01:16:50,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:16:50,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-27 01:16:50,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 207. [2020-10-27 01:16:50,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-27 01:16:50,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 256 transitions. [2020-10-27 01:16:50,694 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 256 transitions. Word has length 59 [2020-10-27 01:16:50,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:50,694 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 256 transitions. [2020-10-27 01:16:50,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:16:50,694 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 256 transitions. [2020-10-27 01:16:50,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 01:16:50,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:50,695 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:16:50,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:16:50,696 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:50,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:50,696 INFO L82 PathProgramCache]: Analyzing trace with hash 120592213, now seen corresponding path program 4 times [2020-10-27 01:16:50,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:50,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969990038] [2020-10-27 01:16:50,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:50,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:50,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:51,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:52,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:52,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:16:52,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:16:52,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1445 [2020-10-27 01:16:52,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:52,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:16:52,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:16:52,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:16:52,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:52,750 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-27 01:16:53,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:53,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:53,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:53,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:53,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:53,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:53,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:16:53,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:53,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:53,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:53,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:53,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:16:53,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969990038] [2020-10-27 01:16:53,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:53,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:16:53,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741772318] [2020-10-27 01:16:53,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:16:53,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:53,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:16:53,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:16:53,458 INFO L87 Difference]: Start difference. First operand 207 states and 256 transitions. Second operand 19 states. [2020-10-27 01:16:54,341 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-10-27 01:16:54,760 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2020-10-27 01:16:55,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:55,576 INFO L93 Difference]: Finished difference Result 235 states and 285 transitions. [2020-10-27 01:16:55,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:16:55,577 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 59 [2020-10-27 01:16:55,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:55,579 INFO L225 Difference]: With dead ends: 235 [2020-10-27 01:16:55,579 INFO L226 Difference]: Without dead ends: 214 [2020-10-27 01:16:55,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:16:55,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-27 01:16:55,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 202. [2020-10-27 01:16:55,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-27 01:16:55,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 249 transitions. [2020-10-27 01:16:55,593 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 249 transitions. Word has length 59 [2020-10-27 01:16:55,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:55,593 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 249 transitions. [2020-10-27 01:16:55,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:16:55,593 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 249 transitions. [2020-10-27 01:16:55,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 01:16:55,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:55,594 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:16:55,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:16:55,595 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:55,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:55,595 INFO L82 PathProgramCache]: Analyzing trace with hash -375200506, now seen corresponding path program 5 times [2020-10-27 01:16:55,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:55,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822817781] [2020-10-27 01:16:55,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:55,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:55,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:56,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:56,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:16:56,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:56,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 874 [2020-10-27 01:16:56,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:56,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:16:56,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:16:56,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:16:56,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:56,970 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-10-27 01:16:57,093 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-27 01:16:57,292 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-10-27 01:16:57,470 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-10-27 01:16:57,634 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-27 01:16:58,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:58,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:58,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:58,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:58,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:58,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:58,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:16:58,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:58,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:58,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:58,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:58,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:16:58,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822817781] [2020-10-27 01:16:58,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:58,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:16:58,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046574386] [2020-10-27 01:16:58,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:16:58,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:58,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:16:58,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:16:58,043 INFO L87 Difference]: Start difference. First operand 202 states and 249 transitions. Second operand 20 states. [2020-10-27 01:16:58,944 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-27 01:16:59,469 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-27 01:16:59,906 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 73 [2020-10-27 01:17:00,126 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2020-10-27 01:17:00,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:17:00,809 INFO L93 Difference]: Finished difference Result 231 states and 281 transitions. [2020-10-27 01:17:00,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:17:00,810 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-10-27 01:17:00,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:17:00,812 INFO L225 Difference]: With dead ends: 231 [2020-10-27 01:17:00,813 INFO L226 Difference]: Without dead ends: 223 [2020-10-27 01:17:00,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:17:00,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-27 01:17:00,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 213. [2020-10-27 01:17:00,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-27 01:17:00,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 262 transitions. [2020-10-27 01:17:00,837 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 262 transitions. Word has length 59 [2020-10-27 01:17:00,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:17:00,837 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 262 transitions. [2020-10-27 01:17:00,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:17:00,838 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 262 transitions. [2020-10-27 01:17:00,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 01:17:00,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:17:00,839 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:17:00,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:17:00,839 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:17:00,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:17:00,839 INFO L82 PathProgramCache]: Analyzing trace with hash 2081658561, now seen corresponding path program 15 times [2020-10-27 01:17:00,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:17:00,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757697633] [2020-10-27 01:17:00,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:17:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:00,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:01,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:01,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 01:17:01,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:17:01,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 777 [2020-10-27 01:17:01,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:01,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:17:01,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:17:01,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:17:01,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:02,114 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-27 01:17:02,323 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-27 01:17:02,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:17:02,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:02,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:02,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:02,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:17:02,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:17:02,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:17:02,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:02,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:17:02,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:17:02,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:17:02,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:02,978 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:17:02,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757697633] [2020-10-27 01:17:02,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:17:02,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:17:02,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313518653] [2020-10-27 01:17:02,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:17:02,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:17:02,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:17:02,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:17:02,980 INFO L87 Difference]: Start difference. First operand 213 states and 262 transitions. Second operand 21 states. [2020-10-27 01:17:03,868 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-27 01:17:04,057 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2020-10-27 01:17:04,413 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-27 01:17:04,616 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-27 01:17:05,096 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2020-10-27 01:17:06,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:17:06,065 INFO L93 Difference]: Finished difference Result 294 states and 352 transitions. [2020-10-27 01:17:06,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:17:06,066 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2020-10-27 01:17:06,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:17:06,068 INFO L225 Difference]: With dead ends: 294 [2020-10-27 01:17:06,068 INFO L226 Difference]: Without dead ends: 288 [2020-10-27 01:17:06,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:17:06,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-10-27 01:17:06,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 254. [2020-10-27 01:17:06,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-27 01:17:06,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 310 transitions. [2020-10-27 01:17:06,087 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 310 transitions. Word has length 61 [2020-10-27 01:17:06,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:17:06,087 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 310 transitions. [2020-10-27 01:17:06,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:17:06,088 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 310 transitions. [2020-10-27 01:17:06,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 01:17:06,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:17:06,089 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:17:06,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:17:06,089 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:17:06,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:17:06,089 INFO L82 PathProgramCache]: Analyzing trace with hash 618193025, now seen corresponding path program 5 times [2020-10-27 01:17:06,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:17:06,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982569997] [2020-10-27 01:17:06,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:17:06,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:06,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:06,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:06,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 01:17:06,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:17:06,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 771 [2020-10-27 01:17:06,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:06,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:17:06,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:17:06,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:17:06,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:07,245 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-27 01:17:07,506 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-27 01:17:07,753 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-10-27 01:17:08,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:17:08,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:08,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:08,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:08,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:17:08,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:17:08,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:17:08,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:08,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:17:08,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:17:08,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:17:08,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:08,442 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:17:08,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982569997] [2020-10-27 01:17:08,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:17:08,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:17:08,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460515392] [2020-10-27 01:17:08,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:17:08,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:17:08,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:17:08,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:17:08,443 INFO L87 Difference]: Start difference. First operand 254 states and 310 transitions. Second operand 21 states. [2020-10-27 01:17:09,902 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-10-27 01:17:10,115 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-10-27 01:17:10,514 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2020-10-27 01:17:10,761 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2020-10-27 01:17:10,935 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-27 01:17:11,282 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2020-10-27 01:17:12,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:17:12,380 INFO L93 Difference]: Finished difference Result 280 states and 337 transitions. [2020-10-27 01:17:12,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:17:12,381 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2020-10-27 01:17:12,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:17:12,384 INFO L225 Difference]: With dead ends: 280 [2020-10-27 01:17:12,384 INFO L226 Difference]: Without dead ends: 272 [2020-10-27 01:17:12,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=157, Invalid=1483, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:17:12,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-27 01:17:12,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 256. [2020-10-27 01:17:12,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-27 01:17:12,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 312 transitions. [2020-10-27 01:17:12,405 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 312 transitions. Word has length 61 [2020-10-27 01:17:12,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:17:12,406 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 312 transitions. [2020-10-27 01:17:12,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:17:12,406 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 312 transitions. [2020-10-27 01:17:12,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 01:17:12,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:17:12,407 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:17:12,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:17:12,407 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:17:12,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:17:12,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1460285764, now seen corresponding path program 16 times [2020-10-27 01:17:12,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:17:12,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528252331] [2020-10-27 01:17:12,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:17:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:12,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:13,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:13,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 01:17:13,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:17:13,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 832 [2020-10-27 01:17:13,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:13,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:17:13,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:17:13,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 01:17:13,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:13,627 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-10-27 01:17:13,840 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-10-27 01:17:13,982 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-10-27 01:17:14,178 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-10-27 01:17:14,313 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-27 01:17:14,451 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-10-27 01:17:14,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:17:14,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:14,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:15,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:15,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:17:15,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:17:15,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:17:15,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:15,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:17:15,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:17:15,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:17:15,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:15,060 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:17:15,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528252331] [2020-10-27 01:17:15,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:17:15,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:17:15,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718144958] [2020-10-27 01:17:15,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:17:15,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:17:15,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:17:15,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:17:15,062 INFO L87 Difference]: Start difference. First operand 256 states and 312 transitions. Second operand 22 states. [2020-10-27 01:17:16,264 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-10-27 01:17:17,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:17:17,381 INFO L93 Difference]: Finished difference Result 306 states and 365 transitions. [2020-10-27 01:17:17,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:17:17,382 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 63 [2020-10-27 01:17:17,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:17:17,384 INFO L225 Difference]: With dead ends: 306 [2020-10-27 01:17:17,384 INFO L226 Difference]: Without dead ends: 300 [2020-10-27 01:17:17,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:17:17,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-10-27 01:17:17,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 266. [2020-10-27 01:17:17,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-27 01:17:17,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 323 transitions. [2020-10-27 01:17:17,406 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 323 transitions. Word has length 63 [2020-10-27 01:17:17,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:17:17,406 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 323 transitions. [2020-10-27 01:17:17,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:17:17,407 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 323 transitions. [2020-10-27 01:17:17,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 01:17:17,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:17:17,408 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:17:17,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:17:17,408 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:17:17,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:17:17,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1805320877, now seen corresponding path program 6 times [2020-10-27 01:17:17,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:17:17,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412600552] [2020-10-27 01:17:17,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:17:17,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:17,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:18,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:18,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 01:17:18,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:17:18,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1132 [2020-10-27 01:17:18,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:18,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:17:18,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:17:18,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:17:18,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:19,068 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2020-10-27 01:17:19,452 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-27 01:17:19,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:17:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:20,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:20,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:20,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:17:20,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:17:20,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:17:20,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:20,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:17:20,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:17:20,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:17:20,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:20,040 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:17:20,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412600552] [2020-10-27 01:17:20,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:17:20,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:17:20,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304132329] [2020-10-27 01:17:20,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:17:20,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:17:20,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:17:20,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:17:20,041 INFO L87 Difference]: Start difference. First operand 266 states and 323 transitions. Second operand 21 states. [2020-10-27 01:17:20,945 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-10-27 01:17:21,118 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-10-27 01:17:21,464 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-27 01:17:21,669 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-27 01:17:21,881 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-27 01:17:22,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:17:22,444 INFO L93 Difference]: Finished difference Result 286 states and 344 transitions. [2020-10-27 01:17:22,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:17:22,445 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 63 [2020-10-27 01:17:22,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:17:22,447 INFO L225 Difference]: With dead ends: 286 [2020-10-27 01:17:22,447 INFO L226 Difference]: Without dead ends: 278 [2020-10-27 01:17:22,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:17:22,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-27 01:17:22,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 268. [2020-10-27 01:17:22,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-27 01:17:22,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 325 transitions. [2020-10-27 01:17:22,470 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 325 transitions. Word has length 63 [2020-10-27 01:17:22,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:17:22,471 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 325 transitions. [2020-10-27 01:17:22,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:17:22,471 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 325 transitions. [2020-10-27 01:17:22,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 01:17:22,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:17:22,472 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:17:22,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:17:22,472 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:17:22,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:17:22,473 INFO L82 PathProgramCache]: Analyzing trace with hash 640283639, now seen corresponding path program 17 times [2020-10-27 01:17:22,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:17:22,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126373552] [2020-10-27 01:17:22,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:17:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:22,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:23,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:23,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 01:17:23,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:17:23,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 955 [2020-10-27 01:17:23,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:23,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:17:23,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:17:23,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:17:23,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:23,870 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-27 01:17:24,073 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-10-27 01:17:24,353 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-27 01:17:24,502 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-10-27 01:17:24,646 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-10-27 01:17:25,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:17:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:25,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:25,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:25,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:17:25,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:17:25,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:17:25,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:25,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:17:25,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:17:25,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:17:25,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:25,286 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:17:25,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126373552] [2020-10-27 01:17:25,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:17:25,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:17:25,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656079768] [2020-10-27 01:17:25,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:17:25,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:17:25,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:17:25,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:17:25,288 INFO L87 Difference]: Start difference. First operand 268 states and 325 transitions. Second operand 22 states. [2020-10-27 01:17:26,912 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-27 01:17:27,134 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-27 01:17:27,419 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2020-10-27 01:17:28,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:17:28,630 INFO L93 Difference]: Finished difference Result 310 states and 369 transitions. [2020-10-27 01:17:28,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:17:28,631 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 65 [2020-10-27 01:17:28,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:17:28,633 INFO L225 Difference]: With dead ends: 310 [2020-10-27 01:17:28,633 INFO L226 Difference]: Without dead ends: 282 [2020-10-27 01:17:28,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:17:28,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-27 01:17:28,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 233. [2020-10-27 01:17:28,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-10-27 01:17:28,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 284 transitions. [2020-10-27 01:17:28,647 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 284 transitions. Word has length 65 [2020-10-27 01:17:28,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:17:28,647 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 284 transitions. [2020-10-27 01:17:28,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:17:28,647 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 284 transitions. [2020-10-27 01:17:28,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 01:17:28,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:17:28,648 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:17:28,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:17:28,648 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:17:28,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:17:28,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1725929816, now seen corresponding path program 18 times [2020-10-27 01:17:28,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:17:28,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318728172] [2020-10-27 01:17:28,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:17:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:28,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:29,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:29,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 01:17:29,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:17:29,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1046 [2020-10-27 01:17:29,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:29,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:17:29,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:17:29,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 01:17:29,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:30,195 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-10-27 01:17:30,409 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-27 01:17:30,693 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-27 01:17:31,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:17:31,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:31,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:31,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:31,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:17:31,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:17:31,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:17:31,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:31,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:17:31,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:17:31,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:17:31,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:31,378 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:17:31,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318728172] [2020-10-27 01:17:31,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:17:31,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:17:31,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128270436] [2020-10-27 01:17:31,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:17:31,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:17:31,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:17:31,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:17:31,380 INFO L87 Difference]: Start difference. First operand 233 states and 284 transitions. Second operand 23 states. [2020-10-27 01:17:33,149 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 77 [2020-10-27 01:17:33,445 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 83 [2020-10-27 01:17:33,727 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 86 [2020-10-27 01:17:34,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:17:34,602 INFO L93 Difference]: Finished difference Result 271 states and 325 transitions. [2020-10-27 01:17:34,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:17:34,603 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2020-10-27 01:17:34,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:17:34,605 INFO L225 Difference]: With dead ends: 271 [2020-10-27 01:17:34,605 INFO L226 Difference]: Without dead ends: 265 [2020-10-27 01:17:34,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:17:34,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-10-27 01:17:34,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 252. [2020-10-27 01:17:34,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-27 01:17:34,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 306 transitions. [2020-10-27 01:17:34,625 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 306 transitions. Word has length 65 [2020-10-27 01:17:34,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:17:34,625 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 306 transitions. [2020-10-27 01:17:34,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:17:34,626 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 306 transitions. [2020-10-27 01:17:34,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 01:17:34,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:17:34,627 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:17:34,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:17:34,627 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:17:34,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:17:34,628 INFO L82 PathProgramCache]: Analyzing trace with hash 458063223, now seen corresponding path program 7 times [2020-10-27 01:17:34,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:17:34,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645467365] [2020-10-27 01:17:34,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:17:34,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:34,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:35,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:35,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:35,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:38,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:38,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 01:17:38,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:17:38,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3831 [2020-10-27 01:17:38,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:38,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:17:38,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:17:38,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:17:38,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:39,070 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-27 01:17:39,332 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-10-27 01:17:39,466 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-27 01:17:39,605 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-27 01:17:40,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:17:40,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:40,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:40,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:40,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:17:40,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:17:40,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:17:40,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:40,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:17:40,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:17:40,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:17:40,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 12 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:17:40,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645467365] [2020-10-27 01:17:40,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:17:40,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:17:40,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298616814] [2020-10-27 01:17:40,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:17:40,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:17:40,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:17:40,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:17:40,215 INFO L87 Difference]: Start difference. First operand 252 states and 306 transitions. Second operand 22 states. [2020-10-27 01:17:41,412 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-10-27 01:17:41,889 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2020-10-27 01:17:42,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:17:42,823 INFO L93 Difference]: Finished difference Result 284 states and 339 transitions. [2020-10-27 01:17:42,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:17:42,824 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 65 [2020-10-27 01:17:42,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:17:42,826 INFO L225 Difference]: With dead ends: 284 [2020-10-27 01:17:42,826 INFO L226 Difference]: Without dead ends: 261 [2020-10-27 01:17:42,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:17:42,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-27 01:17:42,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 247. [2020-10-27 01:17:42,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-27 01:17:42,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 297 transitions. [2020-10-27 01:17:42,844 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 297 transitions. Word has length 65 [2020-10-27 01:17:42,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:17:42,844 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 297 transitions. [2020-10-27 01:17:42,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:17:42,844 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 297 transitions. [2020-10-27 01:17:42,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 01:17:42,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:17:42,845 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:17:42,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:17:42,846 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:17:42,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:17:42,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1881223064, now seen corresponding path program 8 times [2020-10-27 01:17:42,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:17:42,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729600682] [2020-10-27 01:17:42,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:17:42,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:42,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:44,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:44,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 01:17:44,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:17:44,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1098 [2020-10-27 01:17:44,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:44,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:17:44,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:17:44,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:17:44,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:44,559 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-27 01:17:44,848 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-27 01:17:45,130 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-10-27 01:17:45,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:17:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:45,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:45,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:45,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:17:45,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:17:45,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:17:45,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:45,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:17:45,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:17:45,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:17:45,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:45,777 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:17:45,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729600682] [2020-10-27 01:17:45,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:17:45,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:17:45,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703205795] [2020-10-27 01:17:45,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:17:45,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:17:45,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:17:45,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:17:45,778 INFO L87 Difference]: Start difference. First operand 247 states and 297 transitions. Second operand 23 states. [2020-10-27 01:17:47,270 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 78 [2020-10-27 01:17:47,559 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 81 [2020-10-27 01:17:48,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:17:48,252 INFO L93 Difference]: Finished difference Result 257 states and 308 transitions. [2020-10-27 01:17:48,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:17:48,252 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2020-10-27 01:17:48,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:17:48,254 INFO L225 Difference]: With dead ends: 257 [2020-10-27 01:17:48,254 INFO L226 Difference]: Without dead ends: 249 [2020-10-27 01:17:48,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:17:48,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-27 01:17:48,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2020-10-27 01:17:48,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-27 01:17:48,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 299 transitions. [2020-10-27 01:17:48,272 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 299 transitions. Word has length 65 [2020-10-27 01:17:48,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:17:48,273 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 299 transitions. [2020-10-27 01:17:48,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:17:48,273 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 299 transitions. [2020-10-27 01:17:48,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 01:17:48,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:17:48,274 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:17:48,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:17:48,274 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:17:48,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:17:48,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1240579869, now seen corresponding path program 19 times [2020-10-27 01:17:48,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:17:48,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386221302] [2020-10-27 01:17:48,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:17:48,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:48,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:49,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:49,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 01:17:49,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:17:49,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1036 [2020-10-27 01:17:49,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:49,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:17:49,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:17:49,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 01:17:49,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:49,854 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-27 01:17:49,985 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-27 01:17:50,198 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-10-27 01:17:50,339 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-10-27 01:17:50,553 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2020-10-27 01:17:51,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:17:51,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:51,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:51,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:51,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:17:51,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:17:51,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:17:51,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:51,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:17:51,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:17:51,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:17:51,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:17:51,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386221302] [2020-10-27 01:17:51,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:17:51,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:17:51,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107981700] [2020-10-27 01:17:51,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:17:51,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:17:51,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:17:51,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:17:51,495 INFO L87 Difference]: Start difference. First operand 249 states and 299 transitions. Second operand 24 states. [2020-10-27 01:17:52,938 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2020-10-27 01:17:53,231 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 67 [2020-10-27 01:17:53,403 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-27 01:17:53,679 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 01:17:53,911 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-27 01:17:54,086 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-27 01:17:54,509 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 95 [2020-10-27 01:17:56,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:17:56,004 INFO L93 Difference]: Finished difference Result 353 states and 414 transitions. [2020-10-27 01:17:56,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:17:56,004 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2020-10-27 01:17:56,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:17:56,006 INFO L225 Difference]: With dead ends: 353 [2020-10-27 01:17:56,006 INFO L226 Difference]: Without dead ends: 347 [2020-10-27 01:17:56,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=164, Invalid=1642, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:17:56,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-27 01:17:56,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 299. [2020-10-27 01:17:56,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-10-27 01:17:56,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 357 transitions. [2020-10-27 01:17:56,027 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 357 transitions. Word has length 67 [2020-10-27 01:17:56,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:17:56,028 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 357 transitions. [2020-10-27 01:17:56,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:17:56,028 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 357 transitions. [2020-10-27 01:17:56,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 01:17:56,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:17:56,029 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:17:56,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:17:56,030 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:17:56,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:17:56,030 INFO L82 PathProgramCache]: Analyzing trace with hash 933284707, now seen corresponding path program 6 times [2020-10-27 01:17:56,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:17:56,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248934005] [2020-10-27 01:17:56,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:17:56,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:56,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:57,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:57,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 01:17:57,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:17:57,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1063 [2020-10-27 01:17:57,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:57,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:17:57,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:17:57,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 01:17:57,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:57,571 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-27 01:17:57,822 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-27 01:17:58,141 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-10-27 01:17:58,434 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-10-27 01:17:58,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:17:58,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:58,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:58,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:58,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:17:58,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:17:58,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:17:58,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:58,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:17:58,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:17:58,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:17:58,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:58,915 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:17:58,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248934005] [2020-10-27 01:17:58,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:17:58,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:17:58,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190070401] [2020-10-27 01:17:58,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:17:58,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:17:58,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:17:58,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:17:58,917 INFO L87 Difference]: Start difference. First operand 299 states and 357 transitions. Second operand 24 states. [2020-10-27 01:18:00,630 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 75 [2020-10-27 01:18:00,969 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 71 [2020-10-27 01:18:01,479 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 82 [2020-10-27 01:18:02,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:18:02,608 INFO L93 Difference]: Finished difference Result 338 states and 399 transitions. [2020-10-27 01:18:02,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:18:02,609 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2020-10-27 01:18:02,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:18:02,612 INFO L225 Difference]: With dead ends: 338 [2020-10-27 01:18:02,612 INFO L226 Difference]: Without dead ends: 330 [2020-10-27 01:18:02,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=154, Invalid=1486, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:18:02,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-27 01:18:02,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 308. [2020-10-27 01:18:02,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-10-27 01:18:02,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 368 transitions. [2020-10-27 01:18:02,638 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 368 transitions. Word has length 67 [2020-10-27 01:18:02,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:18:02,639 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 368 transitions. [2020-10-27 01:18:02,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:18:02,639 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 368 transitions. [2020-10-27 01:18:02,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 01:18:02,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:18:02,640 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:18:02,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:18:02,640 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:18:02,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:18:02,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1324251230, now seen corresponding path program 20 times [2020-10-27 01:18:02,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:18:02,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058882784] [2020-10-27 01:18:02,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:18:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:18:02,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:04,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:18:04,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 01:18:04,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:18:04,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1521 [2020-10-27 01:18:04,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:18:04,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:18:04,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:18:04,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 01:18:04,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:18:04,662 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-10-27 01:18:04,871 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-27 01:18:05,156 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-10-27 01:18:05,295 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-10-27 01:18:05,553 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2020-10-27 01:18:05,716 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-27 01:18:05,897 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-27 01:18:06,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:18:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:18:06,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:06,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:18:06,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:18:06,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:18:06,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:18:06,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:18:06,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:18:06,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:18:06,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:18:06,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:18:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:18:06,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058882784] [2020-10-27 01:18:06,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:18:06,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:18:06,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706008781] [2020-10-27 01:18:06,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:18:06,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:18:06,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:18:06,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:18:06,674 INFO L87 Difference]: Start difference. First operand 308 states and 368 transitions. Second operand 25 states. [2020-10-27 01:18:07,883 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-10-27 01:18:08,115 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-27 01:18:08,448 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-27 01:18:08,711 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 01:18:09,086 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2020-10-27 01:18:10,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:18:10,664 INFO L93 Difference]: Finished difference Result 376 states and 440 transitions. [2020-10-27 01:18:10,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:18:10,665 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 69 [2020-10-27 01:18:10,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:18:10,668 INFO L225 Difference]: With dead ends: 376 [2020-10-27 01:18:10,668 INFO L226 Difference]: Without dead ends: 370 [2020-10-27 01:18:10,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=122, Invalid=1360, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:18:10,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-10-27 01:18:10,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 322. [2020-10-27 01:18:10,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-10-27 01:18:10,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 383 transitions. [2020-10-27 01:18:10,701 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 383 transitions. Word has length 69 [2020-10-27 01:18:10,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:18:10,702 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 383 transitions. [2020-10-27 01:18:10,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:18:10,702 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 383 transitions. [2020-10-27 01:18:10,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 01:18:10,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:18:10,703 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:18:10,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:18:10,703 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:18:10,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:18:10,704 INFO L82 PathProgramCache]: Analyzing trace with hash 815709465, now seen corresponding path program 21 times [2020-10-27 01:18:10,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:18:10,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722707587] [2020-10-27 01:18:10,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:18:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:18:10,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:12,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:18:12,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 01:18:12,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:18:12,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1322 [2020-10-27 01:18:12,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:18:12,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:18:12,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:18:12,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 01:18:12,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:18:12,436 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-10-27 01:18:12,620 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-10-27 01:18:12,904 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-10-27 01:18:13,034 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-10-27 01:18:13,235 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2020-10-27 01:18:13,410 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2020-10-27 01:18:13,582 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-10-27 01:18:14,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:18:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:18:14,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:14,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:18:14,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:18:14,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:18:14,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:18:14,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:18:14,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:18:14,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:18:14,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:18:14,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:18:14,383 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 14 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:18:14,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722707587] [2020-10-27 01:18:14,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:18:14,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:18:14,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561093980] [2020-10-27 01:18:14,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:18:14,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:18:14,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:18:14,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:18:14,385 INFO L87 Difference]: Start difference. First operand 322 states and 383 transitions. Second operand 25 states. [2020-10-27 01:18:15,653 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2020-10-27 01:18:15,885 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-27 01:18:16,225 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-27 01:18:16,481 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 01:18:16,854 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2020-10-27 01:18:18,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:18:18,378 INFO L93 Difference]: Finished difference Result 378 states and 442 transitions. [2020-10-27 01:18:18,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:18:18,379 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 71 [2020-10-27 01:18:18,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:18:18,382 INFO L225 Difference]: With dead ends: 378 [2020-10-27 01:18:18,382 INFO L226 Difference]: Without dead ends: 348 [2020-10-27 01:18:18,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=122, Invalid=1360, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:18:18,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-27 01:18:18,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 282. [2020-10-27 01:18:18,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-27 01:18:18,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 337 transitions. [2020-10-27 01:18:18,401 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 337 transitions. Word has length 71 [2020-10-27 01:18:18,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:18:18,401 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 337 transitions. [2020-10-27 01:18:18,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:18:18,401 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 337 transitions. [2020-10-27 01:18:18,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 01:18:18,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:18:18,402 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:18:18,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 01:18:18,403 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:18:18,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:18:18,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1077721206, now seen corresponding path program 22 times [2020-10-27 01:18:18,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:18:18,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927352051] [2020-10-27 01:18:18,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:18:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:18:18,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:19,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:18:19,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 01:18:19,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:18:19,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1319 [2020-10-27 01:18:19,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:18:19,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:18:19,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:18:19,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 01:18:19,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:18:20,377 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-27 01:18:20,514 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-27 01:18:20,781 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-10-27 01:18:20,983 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-27 01:18:21,309 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2020-10-27 01:18:21,718 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2020-10-27 01:18:22,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:18:22,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:18:22,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:22,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:18:22,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:18:22,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:18:22,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:18:22,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:18:22,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:18:22,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:18:22,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:18:22,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:18:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:18:22,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927352051] [2020-10-27 01:18:22,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:18:22,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:18:22,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947780876] [2020-10-27 01:18:22,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:18:22,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:18:22,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:18:22,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:18:22,765 INFO L87 Difference]: Start difference. First operand 282 states and 337 transitions. Second operand 26 states. [2020-10-27 01:18:24,276 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-27 01:18:24,503 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-27 01:18:24,971 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-27 01:18:25,242 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-27 01:18:25,446 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-27 01:18:25,762 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2020-10-27 01:18:26,057 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2020-10-27 01:18:26,286 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-27 01:18:26,738 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-10-27 01:18:27,166 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 99 [2020-10-27 01:18:27,561 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 102 [2020-10-27 01:18:28,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:18:28,767 INFO L93 Difference]: Finished difference Result 324 states and 382 transitions. [2020-10-27 01:18:28,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:18:28,768 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 71 [2020-10-27 01:18:28,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:18:28,769 INFO L225 Difference]: With dead ends: 324 [2020-10-27 01:18:28,769 INFO L226 Difference]: Without dead ends: 318 [2020-10-27 01:18:28,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=195, Invalid=2157, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:18:28,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-27 01:18:28,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 303. [2020-10-27 01:18:28,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-10-27 01:18:28,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 361 transitions. [2020-10-27 01:18:28,798 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 361 transitions. Word has length 71 [2020-10-27 01:18:28,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:18:28,799 INFO L481 AbstractCegarLoop]: Abstraction has 303 states and 361 transitions. [2020-10-27 01:18:28,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:18:28,799 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 361 transitions. [2020-10-27 01:18:28,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 01:18:28,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:18:28,800 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:18:28,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 01:18:28,801 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:18:28,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:18:28,801 INFO L82 PathProgramCache]: Analyzing trace with hash 640704665, now seen corresponding path program 9 times [2020-10-27 01:18:28,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:18:28,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987835916] [2020-10-27 01:18:28,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:18:28,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:18:28,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:29,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:29,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:29,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:30,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:33,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:18:33,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 01:18:33,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:18:33,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 01:18:33,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:18:33,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:18:33,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:18:33,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:18:33,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:18:34,318 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-27 01:18:34,577 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-10-27 01:18:35,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:18:35,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:18:35,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:35,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:18:35,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:18:35,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:18:35,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:18:35,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:18:35,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:18:35,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:18:35,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:18:35,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:18:35,149 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 30 proven. 46 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-27 01:18:35,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987835916] [2020-10-27 01:18:35,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:18:35,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:18:35,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447787878] [2020-10-27 01:18:35,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:18:35,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:18:35,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:18:35,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:18:35,151 INFO L87 Difference]: Start difference. First operand 303 states and 361 transitions. Second operand 21 states. [2020-10-27 01:18:36,287 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 61 [2020-10-27 01:18:36,526 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 67 [2020-10-27 01:18:37,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:18:37,109 INFO L93 Difference]: Finished difference Result 342 states and 404 transitions. [2020-10-27 01:18:37,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:18:37,109 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 71 [2020-10-27 01:18:37,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:18:37,112 INFO L225 Difference]: With dead ends: 342 [2020-10-27 01:18:37,112 INFO L226 Difference]: Without dead ends: 305 [2020-10-27 01:18:37,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:18:37,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-10-27 01:18:37,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 303. [2020-10-27 01:18:37,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-10-27 01:18:37,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 359 transitions. [2020-10-27 01:18:37,138 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 359 transitions. Word has length 71 [2020-10-27 01:18:37,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:18:37,139 INFO L481 AbstractCegarLoop]: Abstraction has 303 states and 359 transitions. [2020-10-27 01:18:37,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:18:37,139 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 359 transitions. [2020-10-27 01:18:37,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 01:18:37,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:18:37,140 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:18:37,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 01:18:37,140 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:18:37,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:18:37,141 INFO L82 PathProgramCache]: Analyzing trace with hash -68864167, now seen corresponding path program 10 times [2020-10-27 01:18:37,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:18:37,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364679378] [2020-10-27 01:18:37,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:18:37,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:18:37,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:37,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:38,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:38,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:41,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:18:41,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 01:18:41,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:18:41,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4726 [2020-10-27 01:18:41,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:18:41,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:18:41,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:18:41,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:18:41,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:18:42,579 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-27 01:18:42,802 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-27 01:18:43,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:18:43,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:18:43,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:43,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:18:43,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:18:43,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:18:43,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:18:43,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:18:43,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:18:43,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:18:43,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:18:43,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:18:43,637 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 32 proven. 48 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-27 01:18:43,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364679378] [2020-10-27 01:18:43,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:18:43,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:18:43,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863389767] [2020-10-27 01:18:43,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:18:43,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:18:43,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:18:43,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:18:43,638 INFO L87 Difference]: Start difference. First operand 303 states and 359 transitions. Second operand 22 states. [2020-10-27 01:18:45,054 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2020-10-27 01:18:45,318 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 72 [2020-10-27 01:18:45,606 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 85 [2020-10-27 01:18:45,932 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 79 [2020-10-27 01:18:46,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:18:46,630 INFO L93 Difference]: Finished difference Result 338 states and 397 transitions. [2020-10-27 01:18:46,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:18:46,631 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 71 [2020-10-27 01:18:46,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:18:46,634 INFO L225 Difference]: With dead ends: 338 [2020-10-27 01:18:46,634 INFO L226 Difference]: Without dead ends: 305 [2020-10-27 01:18:46,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:18:46,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-10-27 01:18:46,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 303. [2020-10-27 01:18:46,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-10-27 01:18:46,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 357 transitions. [2020-10-27 01:18:46,656 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 357 transitions. Word has length 71 [2020-10-27 01:18:46,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:18:46,657 INFO L481 AbstractCegarLoop]: Abstraction has 303 states and 357 transitions. [2020-10-27 01:18:46,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:18:46,657 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 357 transitions. [2020-10-27 01:18:46,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 01:18:46,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:18:46,658 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:18:46,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 01:18:46,658 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:18:46,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:18:46,659 INFO L82 PathProgramCache]: Analyzing trace with hash 353594905, now seen corresponding path program 11 times [2020-10-27 01:18:46,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:18:46,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487752927] [2020-10-27 01:18:46,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:18:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:18:46,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:47,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:48,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking...