/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/heap-manipulation/tree-3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:17:47,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:17:47,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:17:47,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:17:47,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:17:47,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:17:47,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:17:47,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:17:47,057 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:17:47,058 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:17:47,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:17:47,061 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:17:47,062 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:17:47,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:17:47,064 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:17:47,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:17:47,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:17:47,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:17:47,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:17:47,072 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:17:47,074 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:17:47,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:17:47,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:17:47,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:17:47,082 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:17:47,082 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:17:47,082 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:17:47,083 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:17:47,084 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:17:47,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:17:47,087 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:17:47,088 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:17:47,089 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:17:47,094 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:17:47,096 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:17:47,096 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:17:47,097 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:17:47,097 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:17:47,098 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:17:47,099 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:17:47,100 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:17:47,102 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 09:17:47,158 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:17:47,158 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:17:47,160 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:17:47,160 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:17:47,160 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:17:47,161 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:17:47,161 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:17:47,161 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:17:47,161 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:17:47,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:17:47,162 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:17:47,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:17:47,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:17:47,162 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:17:47,162 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:17:47,163 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:17:47,163 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:17:47,163 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:17:47,163 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:17:47,164 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:17:47,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:17:47,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:17:47,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:17:47,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:17:47,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:17:47,177 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:17:47,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:17:47,177 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:17:47,178 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:17:47,178 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:17:47,526 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:17:47,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:17:47,561 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:17:47,562 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:17:47,563 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:17:47,564 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/tree-3.i [2020-10-29 09:17:47,650 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8bb481b1b/e614cf0fbffe470cb5ec0215d0c5699f/FLAG35c43be5f [2020-10-29 09:17:48,307 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:17:48,308 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/tree-3.i [2020-10-29 09:17:48,328 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8bb481b1b/e614cf0fbffe470cb5ec0215d0c5699f/FLAG35c43be5f [2020-10-29 09:17:48,619 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8bb481b1b/e614cf0fbffe470cb5ec0215d0c5699f [2020-10-29 09:17:48,622 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:17:48,629 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:17:48,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:17:48,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:17:48,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:17:48,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:17:48" (1/1) ... [2020-10-29 09:17:48,645 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fb6ff1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:17:48, skipping insertion in model container [2020-10-29 09:17:48,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:17:48" (1/1) ... [2020-10-29 09:17:48,654 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:17:48,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:17:49,015 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:17:49,025 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:17:49,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:17:49,157 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:17:49,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:17:49 WrapperNode [2020-10-29 09:17:49,157 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:17:49,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:17:49,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:17:49,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:17:49,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:17:49" (1/1) ... [2020-10-29 09:17:49,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:17:49" (1/1) ... [2020-10-29 09:17:49,203 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:17:49" (1/1) ... [2020-10-29 09:17:49,203 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:17:49" (1/1) ... [2020-10-29 09:17:49,243 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:17:49" (1/1) ... [2020-10-29 09:17:49,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:17:49" (1/1) ... [2020-10-29 09:17:49,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:17:49" (1/1) ... [2020-10-29 09:17:49,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:17:49,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:17:49,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:17:49,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:17:49,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:17:49" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:17:49,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:17:49,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:17:49,368 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:17:49,368 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-29 09:17:49,368 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-29 09:17:49,369 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-10-29 09:17:49,369 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect [2020-10-29 09:17:49,369 INFO L138 BoogieDeclarations]: Found implementation of procedure create_tree [2020-10-29 09:17:49,369 INFO L138 BoogieDeclarations]: Found implementation of procedure free_tree [2020-10-29 09:17:49,369 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:17:49,369 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:17:49,370 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:17:49,370 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 09:17:49,370 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 09:17:49,370 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:17:49,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:17:49,370 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-29 09:17:49,370 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-29 09:17:49,371 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-29 09:17:49,371 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-29 09:17:49,371 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-29 09:17:49,371 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-29 09:17:49,371 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-29 09:17:49,371 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-29 09:17:49,371 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-29 09:17:49,372 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-29 09:17:49,372 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-29 09:17:49,372 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-29 09:17:49,372 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-29 09:17:49,372 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-29 09:17:49,372 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-29 09:17:49,372 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-29 09:17:49,373 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-29 09:17:49,373 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-29 09:17:49,373 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-29 09:17:49,373 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-29 09:17:49,373 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-29 09:17:49,373 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-29 09:17:49,373 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-29 09:17:49,374 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-29 09:17:49,374 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-29 09:17:49,374 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-29 09:17:49,374 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-29 09:17:49,374 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-29 09:17:49,374 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-29 09:17:49,374 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-29 09:17:49,375 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-29 09:17:49,375 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-29 09:17:49,375 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-29 09:17:49,375 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-29 09:17:49,375 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-29 09:17:49,375 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-29 09:17:49,375 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-29 09:17:49,376 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-29 09:17:49,376 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-29 09:17:49,376 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-29 09:17:49,376 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-29 09:17:49,376 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-29 09:17:49,376 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-29 09:17:49,376 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-29 09:17:49,377 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-29 09:17:49,377 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-29 09:17:49,377 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-29 09:17:49,377 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-29 09:17:49,377 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-29 09:17:49,377 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-29 09:17:49,377 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-29 09:17:49,378 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-29 09:17:49,378 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 09:17:49,378 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-29 09:17:49,378 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-29 09:17:49,378 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-29 09:17:49,378 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-29 09:17:49,379 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-29 09:17:49,379 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-29 09:17:49,379 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-29 09:17:49,379 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-29 09:17:49,379 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-29 09:17:49,379 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 09:17:49,379 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-29 09:17:49,380 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-29 09:17:49,380 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-29 09:17:49,380 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-29 09:17:49,380 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-29 09:17:49,380 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-29 09:17:49,380 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-29 09:17:49,380 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-29 09:17:49,381 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-29 09:17:49,381 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-29 09:17:49,381 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-29 09:17:49,381 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-29 09:17:49,381 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-29 09:17:49,381 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-29 09:17:49,381 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-29 09:17:49,382 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-29 09:17:49,382 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-29 09:17:49,382 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-29 09:17:49,382 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-29 09:17:49,382 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-29 09:17:49,382 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-29 09:17:49,382 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-29 09:17:49,382 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-29 09:17:49,383 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-29 09:17:49,383 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-29 09:17:49,383 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-29 09:17:49,383 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-29 09:17:49,383 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-29 09:17:49,394 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-29 09:17:49,394 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-29 09:17:49,394 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-29 09:17:49,396 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-29 09:17:49,396 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-29 09:17:49,397 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-29 09:17:49,397 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-29 09:17:49,397 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-29 09:17:49,397 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-29 09:17:49,397 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-29 09:17:49,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:17:49,399 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-10-29 09:17:49,399 INFO L130 BoogieDeclarations]: Found specification of procedure inspect [2020-10-29 09:17:49,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-29 09:17:49,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:17:49,400 INFO L130 BoogieDeclarations]: Found specification of procedure create_tree [2020-10-29 09:17:49,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 09:17:49,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-29 09:17:49,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:17:49,400 INFO L130 BoogieDeclarations]: Found specification of procedure free_tree [2020-10-29 09:17:49,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:17:49,401 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:17:49,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:17:49,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:17:49,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:17:50,229 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:17:50,230 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-29 09:17:50,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:17:50 BoogieIcfgContainer [2020-10-29 09:17:50,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:17:50,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:17:50,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:17:50,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:17:50,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:17:48" (1/3) ... [2020-10-29 09:17:50,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@747d22a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:17:50, skipping insertion in model container [2020-10-29 09:17:50,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:17:49" (2/3) ... [2020-10-29 09:17:50,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@747d22a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:17:50, skipping insertion in model container [2020-10-29 09:17:50,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:17:50" (3/3) ... [2020-10-29 09:17:50,242 INFO L111 eAbstractionObserver]: Analyzing ICFG tree-3.i [2020-10-29 09:17:50,255 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:17:50,261 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:17:50,276 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:17:50,304 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:17:50,304 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:17:50,304 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:17:50,304 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:17:50,305 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:17:50,305 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:17:50,305 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:17:50,305 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:17:50,325 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-10-29 09:17:50,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:17:50,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:17:50,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:17:50,334 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:17:50,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:17:50,342 INFO L82 PathProgramCache]: Analyzing trace with hash 406033699, now seen corresponding path program 1 times [2020-10-29 09:17:50,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:17:50,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788568525] [2020-10-29 09:17:50,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:17:50,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:50,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:50,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:50,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:50,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:51,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:51,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:17:51,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:17:51,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1011 [2020-10-29 09:17:51,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:51,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:51,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:17:51,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:17:51,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:17:51,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:17:51,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:51,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:51,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:51,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:51,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:51,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 09:17:51,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:51,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:51,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:51,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:51,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:51,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:17:51,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-29 09:17:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:51,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:51,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:51,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:51,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:51,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-29 09:17:51,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:17:51,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-29 09:17:51,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:51,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:51,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:17:51,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:51,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:17:51,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:17:51,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788568525] [2020-10-29 09:17:51,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:17:51,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 09:17:51,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926968377] [2020-10-29 09:17:51,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:17:51,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:51,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:17:51,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:17:51,812 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 8 states. [2020-10-29 09:17:52,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:17:52,645 INFO L93 Difference]: Finished difference Result 165 states and 251 transitions. [2020-10-29 09:17:52,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:17:52,647 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-29 09:17:52,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:17:52,656 INFO L225 Difference]: With dead ends: 165 [2020-10-29 09:17:52,656 INFO L226 Difference]: Without dead ends: 52 [2020-10-29 09:17:52,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:17:52,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-29 09:17:52,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2020-10-29 09:17:52,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 09:17:52,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-10-29 09:17:52,708 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 22 [2020-10-29 09:17:52,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:17:52,708 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-10-29 09:17:52,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:17:52,709 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-10-29 09:17:52,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:17:52,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:17:52,710 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] [2020-10-29 09:17:52,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:17:52,711 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:17:52,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:17:52,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1521068581, now seen corresponding path program 1 times [2020-10-29 09:17:52,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:17:52,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642684509] [2020-10-29 09:17:52,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:17:52,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:52,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:52,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:52,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:52,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:52,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:53,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:53,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:53,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:53,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:54,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:54,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:17:54,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 09:17:54,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1372 [2020-10-29 09:17:54,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:54,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:54,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:17:54,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 09:17:54,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:17:54,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:17:54,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:54,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:54,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:54,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:54,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:54,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:54,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:17:54,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:54,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:54,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:54,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:54,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:54,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:54,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-29 09:17:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:54,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:54,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:54,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:54,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:54,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:54,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:54,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:54,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-29 09:17:54,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:17:54,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-29 09:17:54,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:54,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:54,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:17:54,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:54,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:17:54,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:54,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:17:54,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642684509] [2020-10-29 09:17:54,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:17:54,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-29 09:17:54,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220775141] [2020-10-29 09:17:54,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:17:54,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:54,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:17:54,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:17:54,441 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 11 states. [2020-10-29 09:17:55,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:17:55,051 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2020-10-29 09:17:55,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:17:55,052 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-29 09:17:55,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:17:55,054 INFO L225 Difference]: With dead ends: 92 [2020-10-29 09:17:55,054 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 09:17:55,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:17:55,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 09:17:55,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2020-10-29 09:17:55,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 09:17:55,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-10-29 09:17:55,064 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 31 [2020-10-29 09:17:55,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:17:55,064 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-10-29 09:17:55,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:17:55,065 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-10-29 09:17:55,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 09:17:55,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:17:55,066 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, 1, 1] [2020-10-29 09:17:55,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:17:55,067 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:17:55,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:17:55,067 INFO L82 PathProgramCache]: Analyzing trace with hash -554767082, now seen corresponding path program 1 times [2020-10-29 09:17:55,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:17:55,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936272729] [2020-10-29 09:17:55,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:17:55,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:55,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:55,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:55,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:17:55,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:55,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 498 [2020-10-29 09:17:55,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:55,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:55,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:17:55,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:17:55,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:17:55,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:55,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:55,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:55,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:55,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:55,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:55,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:17:55,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:55,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:55,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:55,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:55,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:55,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:17:55,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-29 09:17:55,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:55,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:56,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:56,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-29 09:17:56,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:56,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-10-29 09:17:56,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:56,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:56,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:17:56,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:56,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:17:56,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:56,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:17:56,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936272729] [2020-10-29 09:17:56,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:17:56,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:17:56,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037000930] [2020-10-29 09:17:56,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:17:56,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:56,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:17:56,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:17:56,265 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 14 states. [2020-10-29 09:17:57,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:17:57,200 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2020-10-29 09:17:57,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:17:57,200 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-29 09:17:57,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:17:57,202 INFO L225 Difference]: With dead ends: 87 [2020-10-29 09:17:57,202 INFO L226 Difference]: Without dead ends: 82 [2020-10-29 09:17:57,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:17:57,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-29 09:17:57,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 65. [2020-10-29 09:17:57,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-29 09:17:57,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-10-29 09:17:57,215 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 39 [2020-10-29 09:17:57,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:17:57,216 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-10-29 09:17:57,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:17:57,216 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-10-29 09:17:57,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 09:17:57,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:17:57,218 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, 1, 1] [2020-10-29 09:17:57,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:17:57,218 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:17:57,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:17:57,218 INFO L82 PathProgramCache]: Analyzing trace with hash 606550376, now seen corresponding path program 1 times [2020-10-29 09:17:57,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:17:57,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559639374] [2020-10-29 09:17:57,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:17:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:57,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:57,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:58,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:58,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:58,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:17:58,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:17:58,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1555 [2020-10-29 09:17:58,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:58,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:58,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:17:58,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:17:58,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:17:58,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:58,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:58,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:58,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:58,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:58,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:58,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:58,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:17:58,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:58,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:58,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:58,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:58,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:58,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:58,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-29 09:17:58,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:58,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:59,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:59,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-29 09:17:59,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:59,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-29 09:17:59,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:59,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:59,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:17:59,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:59,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:17:59,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:59,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:17:59,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559639374] [2020-10-29 09:17:59,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:17:59,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:17:59,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092099818] [2020-10-29 09:17:59,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:17:59,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:59,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:17:59,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:17:59,242 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 14 states. [2020-10-29 09:18:00,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:18:00,090 INFO L93 Difference]: Finished difference Result 99 states and 112 transitions. [2020-10-29 09:18:00,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:18:00,091 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-29 09:18:00,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:18:00,094 INFO L225 Difference]: With dead ends: 99 [2020-10-29 09:18:00,094 INFO L226 Difference]: Without dead ends: 84 [2020-10-29 09:18:00,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:18:00,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-29 09:18:00,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 65. [2020-10-29 09:18:00,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-29 09:18:00,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2020-10-29 09:18:00,106 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 39 [2020-10-29 09:18:00,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:18:00,106 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2020-10-29 09:18:00,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:18:00,106 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2020-10-29 09:18:00,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:18:00,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:18:00,108 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, 1, 1, 1, 1, 1] [2020-10-29 09:18:00,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:18:00,108 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:18:00,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:18:00,109 INFO L82 PathProgramCache]: Analyzing trace with hash 760567351, now seen corresponding path program 1 times [2020-10-29 09:18:00,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:18:00,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207020666] [2020-10-29 09:18:00,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:18:00,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:00,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:00,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:00,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:18:00,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:00,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 438 [2020-10-29 09:18:00,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:00,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:00,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:18:00,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:18:00,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:18:00,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:18:00,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:18:00,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:00,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:00,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:00,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:18:00,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:00,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 09:18:00,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:00,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:00,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:18:00,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:00,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:18:00,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:18:00,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-29 09:18:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:00,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:01,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:01,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-29 09:18:01,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:01,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-29 09:18:01,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:01,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:01,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:18:01,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:01,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:18:01,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:01,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:18:01,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207020666] [2020-10-29 09:18:01,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:18:01,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:18:01,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847339699] [2020-10-29 09:18:01,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:18:01,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:18:01,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:18:01,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:18:01,379 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand 15 states. [2020-10-29 09:18:02,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:18:02,490 INFO L93 Difference]: Finished difference Result 114 states and 126 transitions. [2020-10-29 09:18:02,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:18:02,492 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-10-29 09:18:02,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:18:02,495 INFO L225 Difference]: With dead ends: 114 [2020-10-29 09:18:02,495 INFO L226 Difference]: Without dead ends: 109 [2020-10-29 09:18:02,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:18:02,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-29 09:18:02,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 89. [2020-10-29 09:18:02,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-29 09:18:02,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2020-10-29 09:18:02,510 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 42 [2020-10-29 09:18:02,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:18:02,510 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2020-10-29 09:18:02,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:18:02,511 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2020-10-29 09:18:02,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:18:02,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:18:02,513 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:18:02,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:18:02,513 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:18:02,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:18:02,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1966095162, now seen corresponding path program 2 times [2020-10-29 09:18:02,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:18:02,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078265390] [2020-10-29 09:18:02,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:18:02,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:02,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:02,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:02,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:03,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:06,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:06,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:18:06,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:18:06,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4313 [2020-10-29 09:18:06,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:06,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:06,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:18:06,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:18:06,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:18:06,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:06,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:18:06,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:06,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:06,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:06,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:18:06,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:06,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:18:06,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:06,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:06,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:18:06,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:06,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:18:06,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:06,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-29 09:18:06,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:06,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:07,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:07,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:07,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:08,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:08,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 09:18:08,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:18:08,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1803 [2020-10-29 09:18:08,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:08,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:08,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:18:08,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:18:08,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:18:08,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:09,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:18:09,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078265390] [2020-10-29 09:18:09,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:18:09,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:18:09,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392207399] [2020-10-29 09:18:09,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:18:09,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:18:09,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:18:09,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:18:09,045 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand 9 states. [2020-10-29 09:18:09,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:18:09,679 INFO L93 Difference]: Finished difference Result 134 states and 150 transitions. [2020-10-29 09:18:09,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:18:09,680 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-29 09:18:09,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:18:09,682 INFO L225 Difference]: With dead ends: 134 [2020-10-29 09:18:09,682 INFO L226 Difference]: Without dead ends: 107 [2020-10-29 09:18:09,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:18:09,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-29 09:18:09,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-29 09:18:09,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-29 09:18:09,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2020-10-29 09:18:09,700 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 42 [2020-10-29 09:18:09,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:18:09,700 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2020-10-29 09:18:09,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:18:09,701 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2020-10-29 09:18:09,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:18:09,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:18:09,703 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, 1, 1, 1, 1, 1] [2020-10-29 09:18:09,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:18:09,703 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:18:09,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:18:09,704 INFO L82 PathProgramCache]: Analyzing trace with hash 2146770745, now seen corresponding path program 1 times [2020-10-29 09:18:09,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:18:09,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245722369] [2020-10-29 09:18:09,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:18:09,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:09,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:10,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:10,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:18:10,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:10,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 440 [2020-10-29 09:18:10,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:10,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:10,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:18:10,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:18:10,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:18:10,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:10,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:18:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:10,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:10,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:10,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:18:10,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:10,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:18:10,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:10,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:10,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:18:10,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:10,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:18:10,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:10,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-29 09:18:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:10,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:10,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:10,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-29 09:18:10,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:10,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-29 09:18:10,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:10,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:10,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:18:10,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:10,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:18:10,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:18:10,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:18:10,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245722369] [2020-10-29 09:18:10,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:18:10,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:18:10,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187911101] [2020-10-29 09:18:10,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:18:10,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:18:10,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:18:10,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:18:10,866 INFO L87 Difference]: Start difference. First operand 107 states and 118 transitions. Second operand 15 states. [2020-10-29 09:18:11,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:18:11,878 INFO L93 Difference]: Finished difference Result 128 states and 142 transitions. [2020-10-29 09:18:11,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:18:11,878 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-10-29 09:18:11,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:18:11,880 INFO L225 Difference]: With dead ends: 128 [2020-10-29 09:18:11,880 INFO L226 Difference]: Without dead ends: 123 [2020-10-29 09:18:11,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:18:11,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-29 09:18:11,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 78. [2020-10-29 09:18:11,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-29 09:18:11,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2020-10-29 09:18:11,912 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 42 [2020-10-29 09:18:11,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:18:11,915 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2020-10-29 09:18:11,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:18:11,915 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2020-10-29 09:18:11,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:18:11,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:18:11,917 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:18:11,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:18:11,920 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:18:11,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:18:11,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1583408903, now seen corresponding path program 1 times [2020-10-29 09:18:11,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:18:11,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30946137] [2020-10-29 09:18:11,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:18:11,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:11,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:12,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:12,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:14,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:14,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 09:18:14,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:18:14,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2383 [2020-10-29 09:18:14,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:14,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:14,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:18:14,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:18:14,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 09:18:14,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:14,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:18:14,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:14,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:14,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:14,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:18:14,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:14,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:18:14,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:14,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:14,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:18:14,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:14,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:18:14,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:14,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-29 09:18:14,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:14,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:14,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:14,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-29 09:18:14,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:14,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-29 09:18:14,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:14,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:14,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:18:14,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:14,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:18:14,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:14,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:18:14,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30946137] [2020-10-29 09:18:14,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:18:14,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:18:14,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296393638] [2020-10-29 09:18:14,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:18:14,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:18:14,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:18:14,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:18:14,935 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand 15 states. [2020-10-29 09:18:15,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:18:15,824 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2020-10-29 09:18:15,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:18:15,824 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2020-10-29 09:18:15,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:18:15,825 INFO L225 Difference]: With dead ends: 96 [2020-10-29 09:18:15,826 INFO L226 Difference]: Without dead ends: 57 [2020-10-29 09:18:15,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:18:15,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-29 09:18:15,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-29 09:18:15,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-29 09:18:15,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2020-10-29 09:18:15,835 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 48 [2020-10-29 09:18:15,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:18:15,835 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2020-10-29 09:18:15,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:18:15,835 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2020-10-29 09:18:15,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 09:18:15,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:18:15,837 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:18:15,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:18:15,837 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:18:15,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:18:15,838 INFO L82 PathProgramCache]: Analyzing trace with hash -2040027605, now seen corresponding path program 1 times [2020-10-29 09:18:15,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:18:15,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612086191] [2020-10-29 09:18:15,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:18:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:15,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:18,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:18,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 09:18:18,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:18,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2456 [2020-10-29 09:18:18,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:18,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:18,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:18:18,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:18:18,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 09:18:18,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:18:18,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:18:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:18,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:18,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:18,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:18:18,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:18,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:18:18,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:18,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:18,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:18:18,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:18,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:18:18,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:18,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-29 09:18:18,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:18,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:20,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:20,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:18:20,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:20,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1748 [2020-10-29 09:18:20,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:20,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:20,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:18:20,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:20,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:18:20,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:20,915 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2020-10-29 09:18:21,188 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 56 [2020-10-29 09:18:21,292 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:18:21,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612086191] [2020-10-29 09:18:21,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:18:21,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:18:21,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776787702] [2020-10-29 09:18:21,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:18:21,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:18:21,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:18:21,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:18:21,295 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 20 states. [2020-10-29 09:18:21,842 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-29 09:18:22,258 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2020-10-29 09:18:23,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:18:23,181 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2020-10-29 09:18:23,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:18:23,182 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2020-10-29 09:18:23,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:18:23,183 INFO L225 Difference]: With dead ends: 95 [2020-10-29 09:18:23,183 INFO L226 Difference]: Without dead ends: 90 [2020-10-29 09:18:23,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:18:23,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-29 09:18:23,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 73. [2020-10-29 09:18:23,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-29 09:18:23,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2020-10-29 09:18:23,194 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 50 [2020-10-29 09:18:23,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:18:23,194 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2020-10-29 09:18:23,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:18:23,195 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2020-10-29 09:18:23,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 09:18:23,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:18:23,197 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:18:23,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:18:23,197 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:18:23,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:18:23,197 INFO L82 PathProgramCache]: Analyzing trace with hash -878710147, now seen corresponding path program 1 times [2020-10-29 09:18:23,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:18:23,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745794261] [2020-10-29 09:18:23,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:18:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:23,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:23,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:27,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:28,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:28,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 09:18:28,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:18:28,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5170 [2020-10-29 09:18:28,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:28,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:28,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:18:28,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 09:18:28,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:18:28,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:28,682 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2020-10-29 09:18:29,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:18:29,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:29,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:29,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:29,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:18:29,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:29,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:18:29,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:29,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:29,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:18:29,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:29,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:18:29,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:29,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-29 09:18:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:29,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:29,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:29,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:18:29,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:29,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 844 [2020-10-29 09:18:29,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:29,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:29,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:18:29,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:29,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:18:29,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:18:30,640 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 49 [2020-10-29 09:18:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:18:30,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745794261] [2020-10-29 09:18:30,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:18:30,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:18:30,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332413154] [2020-10-29 09:18:30,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:18:30,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:18:30,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:18:30,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:18:30,721 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand 16 states. [2020-10-29 09:18:31,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:18:31,991 INFO L93 Difference]: Finished difference Result 107 states and 121 transitions. [2020-10-29 09:18:31,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:18:31,992 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-10-29 09:18:31,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:18:31,993 INFO L225 Difference]: With dead ends: 107 [2020-10-29 09:18:31,993 INFO L226 Difference]: Without dead ends: 92 [2020-10-29 09:18:31,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:18:31,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-29 09:18:32,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 73. [2020-10-29 09:18:32,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-29 09:18:32,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2020-10-29 09:18:32,004 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 50 [2020-10-29 09:18:32,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:18:32,004 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2020-10-29 09:18:32,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:18:32,004 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2020-10-29 09:18:32,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 09:18:32,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:18:32,006 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:18:32,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:18:32,006 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:18:32,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:18:32,007 INFO L82 PathProgramCache]: Analyzing trace with hash 117410050, now seen corresponding path program 1 times [2020-10-29 09:18:32,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:18:32,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3760421] [2020-10-29 09:18:32,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:18:32,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:32,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:34,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:34,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 09:18:34,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:34,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2320 [2020-10-29 09:18:34,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:34,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:34,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:18:34,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:18:34,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 09:18:34,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:34,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:18:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:34,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:34,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:34,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:18:34,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:34,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:18:34,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:34,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:34,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:18:34,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:34,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:18:34,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:34,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-29 09:18:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:34,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:36,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:36,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:18:36,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:36,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1505 [2020-10-29 09:18:36,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:36,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:36,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:18:36,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:36,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:18:36,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:37,007 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2020-10-29 09:18:37,548 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 51 [2020-10-29 09:18:37,637 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:18:37,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3760421] [2020-10-29 09:18:37,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:18:37,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:18:37,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410646805] [2020-10-29 09:18:37,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:18:37,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:18:37,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:18:37,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:18:37,639 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand 21 states. [2020-10-29 09:18:38,702 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 61 [2020-10-29 09:18:40,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:18:40,354 INFO L93 Difference]: Finished difference Result 125 states and 138 transitions. [2020-10-29 09:18:40,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:18:40,355 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-10-29 09:18:40,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:18:40,357 INFO L225 Difference]: With dead ends: 125 [2020-10-29 09:18:40,357 INFO L226 Difference]: Without dead ends: 120 [2020-10-29 09:18:40,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=235, Invalid=1325, Unknown=0, NotChecked=0, Total=1560 [2020-10-29 09:18:40,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-29 09:18:40,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-10-29 09:18:40,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-29 09:18:40,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 109 transitions. [2020-10-29 09:18:40,370 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 109 transitions. Word has length 53 [2020-10-29 09:18:40,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:18:40,370 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 109 transitions. [2020-10-29 09:18:40,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:18:40,370 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 109 transitions. [2020-10-29 09:18:40,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 09:18:40,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:18:40,372 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:18:40,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:18:40,372 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:18:40,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:18:40,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1322937861, now seen corresponding path program 2 times [2020-10-29 09:18:40,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:18:40,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537248109] [2020-10-29 09:18:40,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:18:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:40,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:41,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:41,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:42,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:45,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:45,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 09:18:45,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:18:45,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5137 [2020-10-29 09:18:45,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:45,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:45,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:18:45,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:18:45,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:18:45,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:45,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:18:45,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:45,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:45,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:45,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:18:45,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:45,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:18:45,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:45,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:45,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:18:45,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:45,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:18:45,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:45,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-29 09:18:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:45,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:46,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:47,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:47,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:50,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:50,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:18:50,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:18:50,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-29 09:18:50,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:50,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:50,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:18:50,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:18:50,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:18:50,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:51,300 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:18:51,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537248109] [2020-10-29 09:18:51,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:18:51,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:18:51,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540084475] [2020-10-29 09:18:51,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:18:51,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:18:51,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:18:51,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:18:51,302 INFO L87 Difference]: Start difference. First operand 100 states and 109 transitions. Second operand 14 states. [2020-10-29 09:18:52,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:18:52,554 INFO L93 Difference]: Finished difference Result 154 states and 171 transitions. [2020-10-29 09:18:52,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:18:52,554 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-29 09:18:52,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:18:52,556 INFO L225 Difference]: With dead ends: 154 [2020-10-29 09:18:52,556 INFO L226 Difference]: Without dead ends: 127 [2020-10-29 09:18:52,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:18:52,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-29 09:18:52,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-10-29 09:18:52,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-29 09:18:52,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 139 transitions. [2020-10-29 09:18:52,573 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 139 transitions. Word has length 53 [2020-10-29 09:18:52,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:18:52,573 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 139 transitions. [2020-10-29 09:18:52,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:18:52,573 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 139 transitions. [2020-10-29 09:18:52,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 09:18:52,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:18:52,576 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:18:52,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:18:52,577 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:18:52,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:18:52,577 INFO L82 PathProgramCache]: Analyzing trace with hash 392169664, now seen corresponding path program 1 times [2020-10-29 09:18:52,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:18:52,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155919371] [2020-10-29 09:18:52,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:18:52,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:52,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:54,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:54,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 09:18:54,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:54,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1659 [2020-10-29 09:18:54,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:54,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:54,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:18:54,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:18:54,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 09:18:54,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:54,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:18:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:54,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:54,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:54,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:18:54,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:54,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:18:54,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:54,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:54,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:18:54,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:54,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:18:54,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:54,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-29 09:18:54,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:54,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:55,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:55,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:18:55,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:55,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1109 [2020-10-29 09:18:55,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:55,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:55,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:18:55,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:55,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:18:55,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:56,402 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2020-10-29 09:18:56,837 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 51 [2020-10-29 09:18:56,926 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:18:56,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155919371] [2020-10-29 09:18:56,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:18:56,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:18:56,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014204791] [2020-10-29 09:18:56,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:18:56,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:18:56,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:18:56,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:18:56,928 INFO L87 Difference]: Start difference. First operand 127 states and 139 transitions. Second operand 21 states. [2020-10-29 09:18:57,962 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 62 [2020-10-29 09:18:59,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:18:59,484 INFO L93 Difference]: Finished difference Result 148 states and 163 transitions. [2020-10-29 09:18:59,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:18:59,484 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-10-29 09:18:59,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:18:59,486 INFO L225 Difference]: With dead ends: 148 [2020-10-29 09:18:59,486 INFO L226 Difference]: Without dead ends: 143 [2020-10-29 09:18:59,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=222, Invalid=1260, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:18:59,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-29 09:18:59,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 92. [2020-10-29 09:18:59,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-29 09:18:59,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2020-10-29 09:18:59,497 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 53 [2020-10-29 09:18:59,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:18:59,497 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2020-10-29 09:18:59,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:18:59,497 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2020-10-29 09:18:59,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 09:18:59,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:18:59,498 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:18:59,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:18:59,498 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:18:59,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:18:59,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1162963566, now seen corresponding path program 1 times [2020-10-29 09:18:59,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:18:59,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125987959] [2020-10-29 09:18:59,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:18:59,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:59,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:00,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:03,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:05,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:05,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 09:19:05,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:19:05,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6022 [2020-10-29 09:19:05,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:05,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:05,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:19:05,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:19:05,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 09:19:05,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:05,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:05,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:05,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:05,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:05,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:05,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:05,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:19:05,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:05,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:05,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:05,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:05,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:05,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:05,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-29 09:19:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:05,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:06,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:06,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:19:06,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:06,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 913 [2020-10-29 09:19:06,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:06,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:06,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:19:06,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:06,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:19:06,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:07,523 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-10-29 09:19:08,326 WARN L193 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 54 [2020-10-29 09:19:08,431 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:19:08,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125987959] [2020-10-29 09:19:08,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:19:08,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:19:08,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932521812] [2020-10-29 09:19:08,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:19:08,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:08,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:19:08,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:19:08,433 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand 21 states. [2020-10-29 09:19:09,290 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-10-29 09:19:10,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:10,026 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2020-10-29 09:19:10,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:19:10,026 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-10-29 09:19:10,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:10,028 INFO L225 Difference]: With dead ends: 110 [2020-10-29 09:19:10,029 INFO L226 Difference]: Without dead ends: 68 [2020-10-29 09:19:10,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:19:10,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-29 09:19:10,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-29 09:19:10,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-29 09:19:10,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2020-10-29 09:19:10,038 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 59 [2020-10-29 09:19:10,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:10,038 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2020-10-29 09:19:10,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:19:10,039 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2020-10-29 09:19:10,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 09:19:10,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:10,039 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2020-10-29 09:19:10,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:19:10,040 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:10,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:10,041 INFO L82 PathProgramCache]: Analyzing trace with hash -235310476, now seen corresponding path program 3 times [2020-10-29 09:19:10,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:10,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017540415] [2020-10-29 09:19:10,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:10,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:15,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:15,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 09:19:15,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:15,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-29 09:19:15,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:15,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:15,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 09:19:15,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:19:15,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 09:19:15,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:15,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:15,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:15,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:15,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:15,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:15,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:19:15,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:15,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:15,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:15,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:15,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:15,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:15,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-29 09:19:15,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:16,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:20,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:20,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:19:20,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:20,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4963 [2020-10-29 09:19:20,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:20,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:20,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:19:20,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:20,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:19:20,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:22,005 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-10-29 09:19:22,455 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 69 [2020-10-29 09:19:22,796 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:19:22,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017540415] [2020-10-29 09:19:22,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:19:22,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-29 09:19:22,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794513660] [2020-10-29 09:19:22,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-29 09:19:22,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:22,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-29 09:19:22,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:19:22,798 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand 27 states. [2020-10-29 09:19:24,145 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2020-10-29 09:19:24,990 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 76 [2020-10-29 09:19:25,496 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2020-10-29 09:19:26,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:26,271 INFO L93 Difference]: Finished difference Result 108 states and 121 transitions. [2020-10-29 09:19:26,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:19:26,274 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 61 [2020-10-29 09:19:26,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:26,275 INFO L225 Difference]: With dead ends: 108 [2020-10-29 09:19:26,275 INFO L226 Difference]: Without dead ends: 103 [2020-10-29 09:19:26,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=249, Invalid=1557, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:19:26,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-29 09:19:26,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 84. [2020-10-29 09:19:26,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-29 09:19:26,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2020-10-29 09:19:26,284 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 61 [2020-10-29 09:19:26,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:26,285 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2020-10-29 09:19:26,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-29 09:19:26,285 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2020-10-29 09:19:26,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 09:19:26,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:26,286 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2020-10-29 09:19:26,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:19:26,286 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:26,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:26,286 INFO L82 PathProgramCache]: Analyzing trace with hash 926006982, now seen corresponding path program 2 times [2020-10-29 09:19:26,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:26,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594841964] [2020-10-29 09:19:26,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:26,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:26,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:28,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:37,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:37,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 09:19:37,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:19:37,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10794 [2020-10-29 09:19:37,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:37,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:37,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 09:19:37,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:19:37,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 09:19:37,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:37,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:37,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:37,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:37,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:37,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:37,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:19:37,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:37,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:37,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:37,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:37,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:37,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:37,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-29 09:19:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:38,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:39,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:45,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:45,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:19:45,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:19:45,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7714 [2020-10-29 09:19:45,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:45,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:45,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:19:45,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:45,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:19:45,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:46,143 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 49 [2020-10-29 09:19:46,433 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-29 09:19:47,338 WARN L193 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 85 [2020-10-29 09:19:47,548 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 34 [2020-10-29 09:19:48,239 WARN L193 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 58 [2020-10-29 09:19:48,372 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-29 09:19:48,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594841964] [2020-10-29 09:19:48,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:19:48,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:19:48,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999655827] [2020-10-29 09:19:48,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:19:48,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:48,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:19:48,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:19:48,374 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand 20 states. [2020-10-29 09:19:49,265 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-29 09:19:49,813 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 99 [2020-10-29 09:19:50,441 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2020-10-29 09:19:51,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:51,496 INFO L93 Difference]: Finished difference Result 112 states and 125 transitions. [2020-10-29 09:19:51,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:19:51,497 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 61 [2020-10-29 09:19:51,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:51,498 INFO L225 Difference]: With dead ends: 112 [2020-10-29 09:19:51,498 INFO L226 Difference]: Without dead ends: 107 [2020-10-29 09:19:51,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:19:51,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-29 09:19:51,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 86. [2020-10-29 09:19:51,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-29 09:19:51,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2020-10-29 09:19:51,508 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 61 [2020-10-29 09:19:51,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:51,508 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2020-10-29 09:19:51,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:19:51,508 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2020-10-29 09:19:51,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-29 09:19:51,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:51,509 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2020-10-29 09:19:51,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:19:51,510 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:51,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:51,510 INFO L82 PathProgramCache]: Analyzing trace with hash 44788761, now seen corresponding path program 2 times [2020-10-29 09:19:51,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:51,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397037766] [2020-10-29 09:19:51,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:51,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:56,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:56,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 09:19:56,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:56,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5212 [2020-10-29 09:19:56,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:56,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:56,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-29 09:19:56,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:19:56,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 09:19:56,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:57,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:57,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:57,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:57,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:57,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:57,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:19:57,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:57,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:57,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:57,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:57,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:57,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:57,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-29 09:19:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:57,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:02,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:02,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:20:02,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:20:02,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4791 [2020-10-29 09:20:02,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:02,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:02,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:20:02,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:20:02,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:20:02,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:03,035 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-10-29 09:20:03,206 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-10-29 09:20:03,686 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 72 [2020-10-29 09:20:04,159 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2020-10-29 09:20:04,540 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 44 [2020-10-29 09:20:04,688 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:20:04,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397037766] [2020-10-29 09:20:04,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:20:04,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-29 09:20:04,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363065690] [2020-10-29 09:20:04,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-29 09:20:04,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:20:04,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-29 09:20:04,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:20:04,691 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand 28 states. [2020-10-29 09:20:05,845 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 44 [2020-10-29 09:20:06,085 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 48 [2020-10-29 09:20:06,342 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 53 [2020-10-29 09:20:06,587 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2020-10-29 09:20:06,745 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-29 09:20:07,127 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2020-10-29 09:20:07,814 WARN L193 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 80 [2020-10-29 09:20:08,082 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 50 [2020-10-29 09:20:08,380 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 54 [2020-10-29 09:20:09,089 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 79 [2020-10-29 09:20:09,371 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 59 [2020-10-29 09:20:09,947 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-29 09:20:10,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:20:10,993 INFO L93 Difference]: Finished difference Result 145 states and 161 transitions. [2020-10-29 09:20:10,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-29 09:20:10,994 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 64 [2020-10-29 09:20:10,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:20:10,995 INFO L225 Difference]: With dead ends: 145 [2020-10-29 09:20:10,995 INFO L226 Difference]: Without dead ends: 140 [2020-10-29 09:20:10,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=410, Invalid=2670, Unknown=0, NotChecked=0, Total=3080 [2020-10-29 09:20:10,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-29 09:20:11,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 114. [2020-10-29 09:20:11,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-29 09:20:11,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2020-10-29 09:20:11,007 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 64 [2020-10-29 09:20:11,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:20:11,007 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2020-10-29 09:20:11,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-29 09:20:11,007 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2020-10-29 09:20:11,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-29 09:20:11,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:20:11,009 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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] [2020-10-29 09:20:11,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:20:11,009 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:20:11,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:20:11,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1250316572, now seen corresponding path program 4 times [2020-10-29 09:20:11,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:20:11,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605308340] [2020-10-29 09:20:11,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:20:11,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:11,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:13,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:16,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:16,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:16,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 09:20:16,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:20:16,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-29 09:20:16,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:16,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:16,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:20:16,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:20:16,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 09:20:16,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:16,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:20:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:16,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:16,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:16,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:20:16,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:20:16,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:20:16,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:16,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:16,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:20:16,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:20:16,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:20:16,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:16,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-29 09:20:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:16,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:19,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:20,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:21,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:21,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:20:21,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:20:21,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 09:20:21,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:21,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:21,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:20:21,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-10-29 09:20:21,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 09:20:21,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:22,447 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2020-10-29 09:20:22,655 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-29 09:20:22,833 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2020-10-29 09:20:23,373 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 67 [2020-10-29 09:20:23,755 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 53 [2020-10-29 09:20:23,981 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 19 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:20:23,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605308340] [2020-10-29 09:20:23,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:20:23,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:20:23,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416541245] [2020-10-29 09:20:23,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:20:23,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:20:23,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:20:23,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:20:23,983 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand 20 states. [2020-10-29 09:20:24,826 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2020-10-29 09:20:25,206 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2020-10-29 09:20:26,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:20:26,418 INFO L93 Difference]: Finished difference Result 174 states and 194 transitions. [2020-10-29 09:20:26,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:20:26,419 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 64 [2020-10-29 09:20:26,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:20:26,420 INFO L225 Difference]: With dead ends: 174 [2020-10-29 09:20:26,420 INFO L226 Difference]: Without dead ends: 147 [2020-10-29 09:20:26,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:20:26,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-29 09:20:26,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-10-29 09:20:26,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-29 09:20:26,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 162 transitions. [2020-10-29 09:20:26,431 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 162 transitions. Word has length 64 [2020-10-29 09:20:26,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:20:26,431 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 162 transitions. [2020-10-29 09:20:26,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:20:26,432 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 162 transitions. [2020-10-29 09:20:26,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-29 09:20:26,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:20:26,432 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:20:26,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:20:26,433 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:20:26,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:20:26,433 INFO L82 PathProgramCache]: Analyzing trace with hash -799216741, now seen corresponding path program 2 times [2020-10-29 09:20:26,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:20:26,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115479434] [2020-10-29 09:20:26,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:20:26,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:26,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:31,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:31,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 09:20:31,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:20:31,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5188 [2020-10-29 09:20:31,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:31,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:31,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-29 09:20:31,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:20:31,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 09:20:31,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:31,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:20:31,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:31,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:31,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:31,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:20:31,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:20:31,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:20:31,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:31,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:31,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:20:31,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:20:31,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:20:31,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:31,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-29 09:20:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:32,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:36,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:36,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:20:36,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:20:36,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4314 [2020-10-29 09:20:36,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:36,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:36,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:20:36,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:20:36,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:20:36,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:37,111 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-10-29 09:20:37,533 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-10-29 09:20:38,296 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 72 [2020-10-29 09:20:38,619 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2020-10-29 09:20:38,925 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2020-10-29 09:20:39,079 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:20:39,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115479434] [2020-10-29 09:20:39,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:20:39,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-29 09:20:39,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160265522] [2020-10-29 09:20:39,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-29 09:20:39,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:20:39,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-29 09:20:39,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:20:39,081 INFO L87 Difference]: Start difference. First operand 147 states and 162 transitions. Second operand 28 states. [2020-10-29 09:20:40,873 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2020-10-29 09:20:41,711 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2020-10-29 09:20:43,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:20:43,257 INFO L93 Difference]: Finished difference Result 170 states and 188 transitions. [2020-10-29 09:20:43,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 09:20:43,258 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 64 [2020-10-29 09:20:43,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:20:43,259 INFO L225 Difference]: With dead ends: 170 [2020-10-29 09:20:43,259 INFO L226 Difference]: Without dead ends: 165 [2020-10-29 09:20:43,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=355, Invalid=2095, Unknown=0, NotChecked=0, Total=2450 [2020-10-29 09:20:43,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-29 09:20:43,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 106. [2020-10-29 09:20:43,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-29 09:20:43,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2020-10-29 09:20:43,269 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 64 [2020-10-29 09:20:43,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:20:43,269 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2020-10-29 09:20:43,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-29 09:20:43,269 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2020-10-29 09:20:43,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 09:20:43,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:20:43,270 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:20:43,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:20:43,270 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:20:43,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:20:43,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1477810090, now seen corresponding path program 1 times [2020-10-29 09:20:43,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:20:43,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509552513] [2020-10-29 09:20:43,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:20:43,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:43,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:44,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:48,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:48,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 09:20:48,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:20:48,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-29 09:20:48,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:48,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:48,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 09:20:48,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:20:48,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 09:20:48,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:48,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:20:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:48,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:48,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:48,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:20:48,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:20:48,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:20:48,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:48,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:48,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:20:48,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:20:48,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:20:48,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:49,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-29 09:20:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:49,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:54,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:54,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:20:54,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:20:54,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-29 09:20:54,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:54,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:54,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:20:54,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:20:54,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:20:54,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:54,660 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 37 [2020-10-29 09:20:54,851 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2020-10-29 09:20:55,189 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-10-29 09:20:55,368 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-10-29 09:20:55,828 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2020-10-29 09:20:56,190 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2020-10-29 09:20:56,550 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 31 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:20:56,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509552513] [2020-10-29 09:20:56,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:20:56,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-29 09:20:56,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218392717] [2020-10-29 09:20:56,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-29 09:20:56,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:20:56,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-29 09:20:56,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:20:56,552 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand 27 states. [2020-10-29 09:20:57,780 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 65 [2020-10-29 09:20:58,310 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-10-29 09:20:58,702 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 69 [2020-10-29 09:21:00,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:21:00,507 INFO L93 Difference]: Finished difference Result 126 states and 139 transitions. [2020-10-29 09:21:00,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:21:00,508 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 67 [2020-10-29 09:21:00,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:21:00,510 INFO L225 Difference]: With dead ends: 126 [2020-10-29 09:21:00,510 INFO L226 Difference]: Without dead ends: 81 [2020-10-29 09:21:00,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=231, Invalid=1409, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:21:00,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-29 09:21:00,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-10-29 09:21:00,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-29 09:21:00,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2020-10-29 09:21:00,517 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 67 [2020-10-29 09:21:00,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:21:00,517 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2020-10-29 09:21:00,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-29 09:21:00,517 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2020-10-29 09:21:00,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 09:21:00,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:21:00,518 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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] [2020-10-29 09:21:00,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:21:00,518 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:21:00,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:21:00,519 INFO L82 PathProgramCache]: Analyzing trace with hash -358383283, now seen corresponding path program 5 times [2020-10-29 09:21:00,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:21:00,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406102646] [2020-10-29 09:21:00,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:21:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:01,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:08,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:08,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 09:21:08,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:21:08,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7134 [2020-10-29 09:21:08,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:08,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:08,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-29 09:21:08,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:21:08,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 09:21:08,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:09,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:21:09,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:09,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:09,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:09,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:21:09,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:21:09,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:21:09,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:09,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:09,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:21:09,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:21:09,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:21:09,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:09,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-29 09:21:10,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:10,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:21:16,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:21:16,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 09:21:16,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:21:16,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6022 [2020-10-29 09:21:16,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:21:16,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:21:16,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 09:21:16,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:21:16,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 09:21:16,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:21:17,697 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-10-29 09:21:17,884 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-10-29 09:21:18,247 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-10-29 09:21:18,441 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-10-29 09:21:20,161 WARN L193 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 182 DAG size of output: 87 [2020-10-29 09:21:20,718 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 70 [2020-10-29 09:21:23,845 WARN L193 SmtUtils]: Spent 2.76 s on a formula simplification. DAG size of input: 313 DAG size of output: 102 [2020-10-29 09:21:24,753 WARN L193 SmtUtils]: Spent 791.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 73 [2020-10-29 09:21:26,668 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 171 DAG size of output: 93 [2020-10-29 09:21:27,108 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2020-10-29 09:21:28,191 WARN L193 SmtUtils]: Spent 863.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 65 [2020-10-29 09:21:28,501 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:21:28,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406102646] [2020-10-29 09:21:28,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:21:28,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-29 09:21:28,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537339291] [2020-10-29 09:21:28,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-29 09:21:28,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:21:28,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-29 09:21:28,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:21:28,503 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand 33 states. [2020-10-29 09:21:28,799 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-29 09:21:29,153 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2020-10-29 09:21:29,728 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2020-10-29 09:21:30,452 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-10-29 09:21:30,845 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-29 09:21:31,146 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2020-10-29 09:21:31,471 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-29 09:21:32,331 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 81 [2020-10-29 09:21:33,784 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 83 [2020-10-29 09:21:34,877 WARN L193 SmtUtils]: Spent 939.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 120 [2020-10-29 09:21:35,999 WARN L193 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 75 [2020-10-29 09:21:37,306 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 183 DAG size of output: 108 [2020-10-29 09:21:37,678 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-29 09:21:38,258 WARN L193 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 110 [2020-10-29 09:21:38,719 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-10-29 09:21:39,003 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-10-29 09:21:39,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:21:39,948 INFO L93 Difference]: Finished difference Result 119 states and 133 transitions. [2020-10-29 09:21:39,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-29 09:21:39,949 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 72 [2020-10-29 09:21:39,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:21:39,950 INFO L225 Difference]: With dead ends: 119 [2020-10-29 09:21:39,950 INFO L226 Difference]: Without dead ends: 114 [2020-10-29 09:21:39,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=416, Invalid=2776, Unknown=0, NotChecked=0, Total=3192 [2020-10-29 09:21:39,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-29 09:21:39,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 95. [2020-10-29 09:21:39,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-29 09:21:39,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2020-10-29 09:21:39,962 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 72 [2020-10-29 09:21:39,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:21:39,962 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2020-10-29 09:21:39,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-29 09:21:39,963 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2020-10-29 09:21:39,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 09:21:39,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:21:39,964 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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] [2020-10-29 09:21:39,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:21:39,964 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:21:39,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:21:39,964 INFO L82 PathProgramCache]: Analyzing trace with hash 802934175, now seen corresponding path program 3 times [2020-10-29 09:21:39,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:21:39,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276615208] [2020-10-29 09:21:39,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:21:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:21:40,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking...