/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/merge_sort-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:17:13,245 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:17:13,248 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:17:13,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:17:13,305 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:17:13,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:17:13,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:17:13,321 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:17:13,325 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:17:13,331 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:17:13,333 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:17:13,335 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:17:13,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:17:13,340 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:17:13,342 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:17:13,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:17:13,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:17:13,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:17:13,358 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:17:13,367 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:17:13,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:17:13,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:17:13,373 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:17:13,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:17:13,386 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:17:13,387 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:17:13,387 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:17:13,390 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:17:13,391 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:17:13,392 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:17:13,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:17:13,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:17:13,396 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:17:13,397 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:17:13,398 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:17:13,398 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:17:13,399 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:17:13,400 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:17:13,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:17:13,401 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:17:13,402 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:17:13,410 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 09:17:13,476 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:17:13,477 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:17:13,482 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:17:13,482 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:17:13,483 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:17:13,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:17:13,483 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:17:13,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:17:13,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:17:13,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:17:13,485 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:17:13,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:17:13,485 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:17:13,486 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:17:13,486 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:17:13,486 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:17:13,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:17:13,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:17:13,487 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:17:13,487 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:17:13,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:17:13,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:17:13,487 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:17:13,488 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:17:13,488 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:17:13,488 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:17:13,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:17:13,488 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:17:13,489 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:17:13,489 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:17:13,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:17:13,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:17:13,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:17:13,972 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:17:13,973 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:17:13,975 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/merge_sort-2.i [2020-10-29 09:17:14,063 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ec4376e7/a7faab51b4ea4ff6b99664c11d57e0b6/FLAG84c6922d8 [2020-10-29 09:17:14,709 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:17:14,710 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/merge_sort-2.i [2020-10-29 09:17:14,728 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ec4376e7/a7faab51b4ea4ff6b99664c11d57e0b6/FLAG84c6922d8 [2020-10-29 09:17:15,006 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ec4376e7/a7faab51b4ea4ff6b99664c11d57e0b6 [2020-10-29 09:17:15,010 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:17:15,017 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:17:15,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:17:15,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:17:15,027 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:17:15,028 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:17:15" (1/1) ... [2020-10-29 09:17:15,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c9c28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:17:15, skipping insertion in model container [2020-10-29 09:17:15,035 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:17:15" (1/1) ... [2020-10-29 09:17:15,043 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:17:15,114 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:17:15,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:17:15,546 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:17:15,632 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:17:15,741 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:17:15,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:17:15 WrapperNode [2020-10-29 09:17:15,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:17:15,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:17:15,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:17:15,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:17:15,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:17:15" (1/1) ... [2020-10-29 09:17:15,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:17:15" (1/1) ... [2020-10-29 09:17:15,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:17:15" (1/1) ... [2020-10-29 09:17:15,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:17:15" (1/1) ... [2020-10-29 09:17:15,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:17:15" (1/1) ... [2020-10-29 09:17:15,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:17:15" (1/1) ... [2020-10-29 09:17:15,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:17:15" (1/1) ... [2020-10-29 09:17:15,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:17:15,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:17:15,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:17:15,878 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:17:15,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:17:15" (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 09:17:15,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:17:15,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:17:15,962 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:17:15,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-29 09:17:15,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-29 09:17:15,962 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-10-29 09:17:15,962 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2020-10-29 09:17:15,962 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_pair [2020-10-29 09:17:15,963 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_sort_core [2020-10-29 09:17:15,963 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_before [2020-10-29 09:17:15,963 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_after [2020-10-29 09:17:15,963 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:17:15,964 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:17:15,964 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:17:15,964 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 09:17:15,964 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 09:17:15,964 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:17:15,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:17:15,965 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-29 09:17:15,965 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-29 09:17:15,965 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-29 09:17:15,965 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-29 09:17:15,965 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-29 09:17:15,966 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-29 09:17:15,966 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-29 09:17:15,966 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-29 09:17:15,966 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-29 09:17:15,966 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-29 09:17:15,967 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-29 09:17:15,967 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-29 09:17:15,967 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-29 09:17:15,967 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-29 09:17:15,967 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-29 09:17:15,967 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-29 09:17:15,968 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-29 09:17:15,968 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-29 09:17:15,968 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-29 09:17:15,968 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-29 09:17:15,968 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-29 09:17:15,968 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-29 09:17:15,969 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-29 09:17:15,969 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-29 09:17:15,969 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-29 09:17:15,969 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-29 09:17:15,969 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-29 09:17:15,969 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-29 09:17:15,970 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-29 09:17:15,970 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-29 09:17:15,970 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-29 09:17:15,970 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-29 09:17:15,970 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-29 09:17:15,970 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-29 09:17:15,971 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-29 09:17:15,971 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-29 09:17:15,971 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-29 09:17:15,971 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-29 09:17:15,971 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-29 09:17:15,987 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-29 09:17:15,987 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-29 09:17:15,987 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-29 09:17:15,997 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-29 09:17:15,997 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-29 09:17:15,997 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-29 09:17:15,997 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-29 09:17:15,998 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-29 09:17:15,998 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-29 09:17:15,998 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-29 09:17:15,998 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-29 09:17:15,998 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-29 09:17:15,998 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-29 09:17:15,999 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 09:17:15,999 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-29 09:17:15,999 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-29 09:17:15,999 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-29 09:17:15,999 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-29 09:17:15,999 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-29 09:17:16,000 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-29 09:17:16,000 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-29 09:17:16,000 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-29 09:17:16,000 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-29 09:17:16,000 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 09:17:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-29 09:17:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-29 09:17:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-29 09:17:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-29 09:17:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-29 09:17:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-29 09:17:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-29 09:17:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-29 09:17:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-29 09:17:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-29 09:17:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-29 09:17:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-29 09:17:16,003 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-29 09:17:16,003 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-29 09:17:16,003 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-29 09:17:16,003 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-29 09:17:16,003 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-29 09:17:16,003 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-29 09:17:16,003 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-29 09:17:16,004 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-29 09:17:16,004 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-29 09:17:16,004 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-29 09:17:16,004 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-29 09:17:16,004 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-29 09:17:16,004 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-29 09:17:16,005 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-29 09:17:16,005 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-29 09:17:16,005 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-29 09:17:16,005 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-29 09:17:16,005 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-29 09:17:16,005 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-29 09:17:16,006 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-29 09:17:16,006 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-29 09:17:16,006 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-29 09:17:16,006 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-29 09:17:16,006 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-29 09:17:16,006 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-29 09:17:16,007 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-29 09:17:16,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:17:16,007 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-10-29 09:17:16,007 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2020-10-29 09:17:16,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-29 09:17:16,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-29 09:17:16,008 INFO L130 BoogieDeclarations]: Found specification of procedure merge_pair [2020-10-29 09:17:16,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:17:16,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:17:16,008 INFO L130 BoogieDeclarations]: Found specification of procedure seq_sort_core [2020-10-29 09:17:16,008 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_before [2020-10-29 09:17:16,009 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_after [2020-10-29 09:17:16,009 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:17:16,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 09:17:16,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:17:16,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:17:16,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:17:16,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:17:17,259 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:17:17,260 INFO L298 CfgBuilder]: Removed 33 assume(true) statements. [2020-10-29 09:17:17,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:17:17 BoogieIcfgContainer [2020-10-29 09:17:17,262 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:17:17,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:17:17,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:17:17,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:17:17,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:17:15" (1/3) ... [2020-10-29 09:17:17,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7444ecc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:17:17, skipping insertion in model container [2020-10-29 09:17:17,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:17:15" (2/3) ... [2020-10-29 09:17:17,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7444ecc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:17:17, skipping insertion in model container [2020-10-29 09:17:17,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:17:17" (3/3) ... [2020-10-29 09:17:17,292 INFO L111 eAbstractionObserver]: Analyzing ICFG merge_sort-2.i [2020-10-29 09:17:17,332 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:17:17,349 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:17:17,384 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:17:17,415 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:17:17,416 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:17:17,416 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:17:17,416 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:17:17,416 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:17:17,416 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:17:17,416 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:17:17,417 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:17:17,441 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states. [2020-10-29 09:17:17,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-29 09:17:17,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:17:17,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:17:17,450 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:17:17,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:17:17,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1813451891, now seen corresponding path program 1 times [2020-10-29 09:17:17,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:17:17,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465499577] [2020-10-29 09:17:17,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:17:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:17,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:17,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:17,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:18,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:18,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 09:17:18,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:17:18,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 458 [2020-10-29 09:17:18,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:18,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:18,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:17:18,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:17:18,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:17:18,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 09:17:18,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:18,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:18,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:18,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:18,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:18,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:17:18,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:18,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:18,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:18,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:18,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:18,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:17:18,284 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 09:17:18,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465499577] [2020-10-29 09:17:18,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:17:18,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:17:18,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636340231] [2020-10-29 09:17:18,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:17:18,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:18,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:17:18,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:17:18,312 INFO L87 Difference]: Start difference. First operand 120 states. Second operand 6 states. [2020-10-29 09:17:19,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:17:19,474 INFO L93 Difference]: Finished difference Result 266 states and 458 transitions. [2020-10-29 09:17:19,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:17:19,476 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-29 09:17:19,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:17:19,490 INFO L225 Difference]: With dead ends: 266 [2020-10-29 09:17:19,491 INFO L226 Difference]: Without dead ends: 133 [2020-10-29 09:17:19,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:17:19,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-29 09:17:19,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 108. [2020-10-29 09:17:19,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-29 09:17:19,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 131 transitions. [2020-10-29 09:17:19,565 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 131 transitions. Word has length 15 [2020-10-29 09:17:19,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:17:19,566 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 131 transitions. [2020-10-29 09:17:19,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:17:19,566 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 131 transitions. [2020-10-29 09:17:19,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:17:19,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:17:19,567 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:17:19,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:17:19,568 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:17:19,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:17:19,569 INFO L82 PathProgramCache]: Analyzing trace with hash 633313099, now seen corresponding path program 1 times [2020-10-29 09:17:19,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:17:19,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425968636] [2020-10-29 09:17:19,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:17:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:19,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:19,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:19,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:19,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:20,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:20,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:17:20,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:17:20,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 770 [2020-10-29 09:17:20,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:20,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:20,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:17:20,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:17:20,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:17:20,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:17:20,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:20,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:20,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:20,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:20,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:20,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:17:20,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:20,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:20,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:20,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:20,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:20,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 09:17:20,552 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 09:17:20,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425968636] [2020-10-29 09:17:20,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:17:20,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:17:20,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066041751] [2020-10-29 09:17:20,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:17:20,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:20,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:17:20,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:17:20,567 INFO L87 Difference]: Start difference. First operand 108 states and 131 transitions. Second operand 6 states. [2020-10-29 09:17:21,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:17:21,464 INFO L93 Difference]: Finished difference Result 216 states and 265 transitions. [2020-10-29 09:17:21,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:17:21,465 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-29 09:17:21,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:17:21,467 INFO L225 Difference]: With dead ends: 216 [2020-10-29 09:17:21,467 INFO L226 Difference]: Without dead ends: 120 [2020-10-29 09:17:21,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:17:21,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-29 09:17:21,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 110. [2020-10-29 09:17:21,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-29 09:17:21,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 133 transitions. [2020-10-29 09:17:21,490 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 133 transitions. Word has length 23 [2020-10-29 09:17:21,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:17:21,492 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 133 transitions. [2020-10-29 09:17:21,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:17:21,492 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 133 transitions. [2020-10-29 09:17:21,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:17:21,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:17:21,494 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:17:21,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:17:21,494 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:17:21,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:17:21,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1845444642, now seen corresponding path program 1 times [2020-10-29 09:17:21,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:17:21,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41153855] [2020-10-29 09:17:21,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:17:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:21,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:21,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:21,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:21,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:17:21,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:17:21,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 404 [2020-10-29 09:17:21,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:21,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:21,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:17:21,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:17:21,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:17:21,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:17:22,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:22,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:22,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:22,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:22,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:22,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:22,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:17:22,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:22,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:22,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:22,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:22,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:22,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:17:22,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:17:22,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41153855] [2020-10-29 09:17:22,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:17:22,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:17:22,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088952688] [2020-10-29 09:17:22,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:17:22,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:22,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:17:22,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:17:22,156 INFO L87 Difference]: Start difference. First operand 110 states and 133 transitions. Second operand 8 states. [2020-10-29 09:17:23,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:17:23,834 INFO L93 Difference]: Finished difference Result 205 states and 250 transitions. [2020-10-29 09:17:23,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:17:23,835 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-29 09:17:23,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:17:23,839 INFO L225 Difference]: With dead ends: 205 [2020-10-29 09:17:23,839 INFO L226 Difference]: Without dead ends: 200 [2020-10-29 09:17:23,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:17:23,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-29 09:17:23,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 155. [2020-10-29 09:17:23,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-29 09:17:23,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 189 transitions. [2020-10-29 09:17:23,864 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 189 transitions. Word has length 29 [2020-10-29 09:17:23,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:17:23,864 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 189 transitions. [2020-10-29 09:17:23,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:17:23,865 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 189 transitions. [2020-10-29 09:17:23,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:17:23,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:17:23,866 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:17:23,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:17:23,866 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:17:23,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:17:23,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1641676436, now seen corresponding path program 1 times [2020-10-29 09:17:23,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:17:23,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816282394] [2020-10-29 09:17:23,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:17:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:23,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:23,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:24,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:24,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:17:24,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:17:24,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 311 [2020-10-29 09:17:24,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:24,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:24,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:17:24,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:17:24,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:17:24,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:17:24,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:24,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:24,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:24,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:24,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:24,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:17:24,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:24,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:24,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:24,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:24,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:24,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:17:24,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816282394] [2020-10-29 09:17:24,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:17:24,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:17:24,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552268121] [2020-10-29 09:17:24,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:17:24,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:24,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:17:24,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:17:24,371 INFO L87 Difference]: Start difference. First operand 155 states and 189 transitions. Second operand 8 states. [2020-10-29 09:17:25,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:17:25,678 INFO L93 Difference]: Finished difference Result 238 states and 292 transitions. [2020-10-29 09:17:25,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:17:25,679 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-29 09:17:25,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:17:25,681 INFO L225 Difference]: With dead ends: 238 [2020-10-29 09:17:25,681 INFO L226 Difference]: Without dead ends: 150 [2020-10-29 09:17:25,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:17:25,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-29 09:17:25,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 136. [2020-10-29 09:17:25,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-29 09:17:25,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 162 transitions. [2020-10-29 09:17:25,702 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 162 transitions. Word has length 29 [2020-10-29 09:17:25,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:17:25,702 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 162 transitions. [2020-10-29 09:17:25,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:17:25,702 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 162 transitions. [2020-10-29 09:17:25,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:17:25,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:17:25,704 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] [2020-10-29 09:17:25,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:17:25,704 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:17:25,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:17:25,705 INFO L82 PathProgramCache]: Analyzing trace with hash -178219071, now seen corresponding path program 1 times [2020-10-29 09:17:25,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:17:25,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449518388] [2020-10-29 09:17:25,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:17:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:25,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:25,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:25,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:25,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:17:25,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:17:25,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-29 09:17:25,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:25,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:25,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:17:25,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:17:25,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:17:25,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:26,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:26,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:26,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:26,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:26,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:26,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:17:26,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:26,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:26,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:26,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:26,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:26,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:26,123 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 09:17:26,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449518388] [2020-10-29 09:17:26,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:17:26,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 09:17:26,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792110258] [2020-10-29 09:17:26,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:17:26,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:26,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:17:26,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:17:26,127 INFO L87 Difference]: Start difference. First operand 136 states and 162 transitions. Second operand 8 states. [2020-10-29 09:17:27,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:17:27,459 INFO L93 Difference]: Finished difference Result 179 states and 216 transitions. [2020-10-29 09:17:27,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:17:27,460 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-29 09:17:27,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:17:27,462 INFO L225 Difference]: With dead ends: 179 [2020-10-29 09:17:27,462 INFO L226 Difference]: Without dead ends: 174 [2020-10-29 09:17:27,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:17:27,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-29 09:17:27,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 142. [2020-10-29 09:17:27,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-29 09:17:27,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 168 transitions. [2020-10-29 09:17:27,503 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 168 transitions. Word has length 32 [2020-10-29 09:17:27,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:17:27,504 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 168 transitions. [2020-10-29 09:17:27,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:17:27,504 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 168 transitions. [2020-10-29 09:17:27,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:17:27,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:17:27,507 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:17:27,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:17:27,508 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:17:27,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:17:27,509 INFO L82 PathProgramCache]: Analyzing trace with hash -2052818065, now seen corresponding path program 1 times [2020-10-29 09:17:27,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:17:27,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395702664] [2020-10-29 09:17:27,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:17:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:27,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:27,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:27,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:17:27,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:27,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-29 09:17:27,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:27,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:27,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:17:27,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:17:27,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:17:27,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:27,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:27,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:27,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:27,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:27,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:27,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:17:27,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:27,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:27,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:27,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:27,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:27,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:17:27,898 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 09:17:27,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395702664] [2020-10-29 09:17:27,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:17:27,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 09:17:27,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218883896] [2020-10-29 09:17:27,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:17:27,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:27,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:17:27,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:17:27,901 INFO L87 Difference]: Start difference. First operand 142 states and 168 transitions. Second operand 9 states. [2020-10-29 09:17:29,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:17:29,502 INFO L93 Difference]: Finished difference Result 183 states and 221 transitions. [2020-10-29 09:17:29,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:17:29,504 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-29 09:17:29,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:17:29,509 INFO L225 Difference]: With dead ends: 183 [2020-10-29 09:17:29,510 INFO L226 Difference]: Without dead ends: 178 [2020-10-29 09:17:29,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:17:29,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-29 09:17:29,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 145. [2020-10-29 09:17:29,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-29 09:17:29,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 170 transitions. [2020-10-29 09:17:29,534 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 170 transitions. Word has length 35 [2020-10-29 09:17:29,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:17:29,537 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 170 transitions. [2020-10-29 09:17:29,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:17:29,537 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 170 transitions. [2020-10-29 09:17:29,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:17:29,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:17:29,539 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:17:29,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:17:29,540 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:17:29,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:17:29,541 INFO L82 PathProgramCache]: Analyzing trace with hash -818107463, now seen corresponding path program 2 times [2020-10-29 09:17:29,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:17:29,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971931252] [2020-10-29 09:17:29,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:17:29,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:29,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:29,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:29,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:30,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:30,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:17:30,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:17:30,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 922 [2020-10-29 09:17:30,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:30,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:30,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:17:30,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:17:30,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:17:30,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:30,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:30,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:30,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:30,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:30,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:30,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:17:30,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:30,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:30,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:30,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:30,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:30,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:17:30,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971931252] [2020-10-29 09:17:30,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:17:30,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:17:30,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534508550] [2020-10-29 09:17:30,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:17:30,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:30,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:17:30,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:17:30,648 INFO L87 Difference]: Start difference. First operand 145 states and 170 transitions. Second operand 9 states. [2020-10-29 09:17:32,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:17:32,180 INFO L93 Difference]: Finished difference Result 232 states and 281 transitions. [2020-10-29 09:17:32,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:17:32,181 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-29 09:17:32,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:17:32,184 INFO L225 Difference]: With dead ends: 232 [2020-10-29 09:17:32,184 INFO L226 Difference]: Without dead ends: 166 [2020-10-29 09:17:32,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:17:32,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-29 09:17:32,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 135. [2020-10-29 09:17:32,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-29 09:17:32,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 158 transitions. [2020-10-29 09:17:32,200 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 158 transitions. Word has length 35 [2020-10-29 09:17:32,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:17:32,201 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 158 transitions. [2020-10-29 09:17:32,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:17:32,201 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 158 transitions. [2020-10-29 09:17:32,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:17:32,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:17:32,202 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:17:32,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:17:32,203 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:17:32,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:17:32,203 INFO L82 PathProgramCache]: Analyzing trace with hash -10261245, now seen corresponding path program 2 times [2020-10-29 09:17:32,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:17:32,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064603212] [2020-10-29 09:17:32,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:17:32,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:32,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:32,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:32,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:32,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:32,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:17:32,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:17:32,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 598 [2020-10-29 09:17:32,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:32,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:32,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:17:32,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:17:32,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:17:32,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:33,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:33,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:33,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:33,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:33,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:33,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:33,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:17:33,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:33,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:33,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:33,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:33,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:33,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:33,028 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:17:33,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064603212] [2020-10-29 09:17:33,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:17:33,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:17:33,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799847910] [2020-10-29 09:17:33,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:17:33,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:33,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:17:33,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:17:33,031 INFO L87 Difference]: Start difference. First operand 135 states and 158 transitions. Second operand 9 states. [2020-10-29 09:17:34,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:17:34,775 INFO L93 Difference]: Finished difference Result 170 states and 204 transitions. [2020-10-29 09:17:34,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:17:34,776 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-29 09:17:34,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:17:34,779 INFO L225 Difference]: With dead ends: 170 [2020-10-29 09:17:34,779 INFO L226 Difference]: Without dead ends: 165 [2020-10-29 09:17:34,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:17:34,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-29 09:17:34,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 138. [2020-10-29 09:17:34,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-29 09:17:34,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 161 transitions. [2020-10-29 09:17:34,794 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 161 transitions. Word has length 35 [2020-10-29 09:17:34,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:17:34,794 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 161 transitions. [2020-10-29 09:17:34,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:17:34,795 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 161 transitions. [2020-10-29 09:17:34,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:17:34,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:17:34,796 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:17:34,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:17:34,796 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:17:34,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:17:34,797 INFO L82 PathProgramCache]: Analyzing trace with hash -869899671, now seen corresponding path program 1 times [2020-10-29 09:17:34,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:17:34,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900293409] [2020-10-29 09:17:34,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:17:34,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:34,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:34,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:35,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:35,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:17:35,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:17:35,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-29 09:17:35,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:35,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:35,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:17:35,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 09:17:35,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:17:35,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:35,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:35,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:35,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:35,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:35,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:35,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:35,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:17:35,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:35,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:35,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:35,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:35,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:35,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:17:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 09:17:35,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900293409] [2020-10-29 09:17:35,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:17:35,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 09:17:35,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312096757] [2020-10-29 09:17:35,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:17:35,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:35,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:17:35,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:17:35,306 INFO L87 Difference]: Start difference. First operand 138 states and 161 transitions. Second operand 8 states. [2020-10-29 09:17:36,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:17:36,642 INFO L93 Difference]: Finished difference Result 162 states and 192 transitions. [2020-10-29 09:17:36,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:17:36,643 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-10-29 09:17:36,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:17:36,645 INFO L225 Difference]: With dead ends: 162 [2020-10-29 09:17:36,645 INFO L226 Difference]: Without dead ends: 157 [2020-10-29 09:17:36,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:17:36,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-29 09:17:36,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 141. [2020-10-29 09:17:36,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-29 09:17:36,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 164 transitions. [2020-10-29 09:17:36,660 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 164 transitions. Word has length 38 [2020-10-29 09:17:36,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:17:36,661 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 164 transitions. [2020-10-29 09:17:36,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:17:36,661 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 164 transitions. [2020-10-29 09:17:36,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:17:36,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:17:36,662 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:17:36,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:17:36,663 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:17:36,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:17:36,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1461845744, now seen corresponding path program 1 times [2020-10-29 09:17:36,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:17:36,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105465493] [2020-10-29 09:17:36,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:17:36,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:36,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:36,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:36,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:17:36,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:36,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-29 09:17:36,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:36,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:36,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:17:36,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:17:36,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:17:36,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:37,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:37,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:37,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:37,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:37,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:37,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:17:37,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:37,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:37,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:37,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:37,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:37,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:17:37,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:17:37,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105465493] [2020-10-29 09:17:37,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:17:37,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 09:17:37,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399357481] [2020-10-29 09:17:37,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:17:37,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:37,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:17:37,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:17:37,232 INFO L87 Difference]: Start difference. First operand 141 states and 164 transitions. Second operand 9 states. [2020-10-29 09:17:38,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:17:38,751 INFO L93 Difference]: Finished difference Result 166 states and 198 transitions. [2020-10-29 09:17:38,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:17:38,755 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-10-29 09:17:38,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:17:38,756 INFO L225 Difference]: With dead ends: 166 [2020-10-29 09:17:38,756 INFO L226 Difference]: Without dead ends: 161 [2020-10-29 09:17:38,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:17:38,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-29 09:17:38,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 144. [2020-10-29 09:17:38,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-29 09:17:38,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 167 transitions. [2020-10-29 09:17:38,773 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 167 transitions. Word has length 41 [2020-10-29 09:17:38,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:17:38,773 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 167 transitions. [2020-10-29 09:17:38,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:17:38,773 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 167 transitions. [2020-10-29 09:17:38,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 09:17:38,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:17:38,775 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, 1] [2020-10-29 09:17:38,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:17:38,775 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:17:38,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:17:38,776 INFO L82 PathProgramCache]: Analyzing trace with hash -23929413, now seen corresponding path program 1 times [2020-10-29 09:17:38,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:17:38,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344907838] [2020-10-29 09:17:38,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:17:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:38,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:38,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:38,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:38,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:38,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:39,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:39,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 09:17:39,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:17:39,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 929 [2020-10-29 09:17:39,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:39,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:39,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:17:39,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 09:17:39,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:17:39,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:39,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:39,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:39,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:39,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:39,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:39,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:17:39,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:39,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:39,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:39,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:39,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:39,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:17:39,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-29 09:17:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:39,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:39,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:39,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:39,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:39,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-29 09:17:39,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:17:39,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 09:17:39,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:39,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:39,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:17:39,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:39,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:17:39,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:39,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:17:39,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344907838] [2020-10-29 09:17:39,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:17:39,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:17:39,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384970196] [2020-10-29 09:17:39,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:17:39,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:39,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:17:39,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:17:39,908 INFO L87 Difference]: Start difference. First operand 144 states and 167 transitions. Second operand 6 states. [2020-10-29 09:17:40,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:17:40,755 INFO L93 Difference]: Finished difference Result 178 states and 210 transitions. [2020-10-29 09:17:40,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:17:40,756 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-29 09:17:40,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:17:40,759 INFO L225 Difference]: With dead ends: 178 [2020-10-29 09:17:40,759 INFO L226 Difference]: Without dead ends: 173 [2020-10-29 09:17:40,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:17:40,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-29 09:17:40,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 149. [2020-10-29 09:17:40,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-29 09:17:40,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 173 transitions. [2020-10-29 09:17:40,776 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 173 transitions. Word has length 43 [2020-10-29 09:17:40,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:17:40,776 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 173 transitions. [2020-10-29 09:17:40,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:17:40,776 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 173 transitions. [2020-10-29 09:17:40,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:17:40,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:17:40,777 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, 1, 1, 1, 1] [2020-10-29 09:17:40,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:17:40,778 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:17:40,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:17:40,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1825261231, now seen corresponding path program 1 times [2020-10-29 09:17:40,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:17:40,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475967464] [2020-10-29 09:17:40,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:17:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:40,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:40,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:40,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:40,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:43,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:43,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:17:43,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:17:43,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2612 [2020-10-29 09:17:43,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:43,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:43,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:17:43,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:17:43,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:17:43,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:17:43,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:43,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:43,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:43,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:43,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:43,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:17:43,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:43,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:43,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:43,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:43,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:43,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:43,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-29 09:17:43,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:43,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:43,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:43,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:43,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:43,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-29 09:17:43,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:17:43,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-29 09:17:43,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:43,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:43,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:17:43,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:43,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:17:43,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:43,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:17:43,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475967464] [2020-10-29 09:17:43,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:17:43,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:17:43,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759927551] [2020-10-29 09:17:43,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:17:43,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:43,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:17:43,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:17:43,654 INFO L87 Difference]: Start difference. First operand 149 states and 173 transitions. Second operand 8 states. [2020-10-29 09:17:44,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:17:44,945 INFO L93 Difference]: Finished difference Result 183 states and 215 transitions. [2020-10-29 09:17:44,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:17:44,946 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-10-29 09:17:44,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:17:44,948 INFO L225 Difference]: With dead ends: 183 [2020-10-29 09:17:44,948 INFO L226 Difference]: Without dead ends: 178 [2020-10-29 09:17:44,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:17:44,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-29 09:17:44,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 157. [2020-10-29 09:17:44,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-29 09:17:44,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 182 transitions. [2020-10-29 09:17:44,966 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 182 transitions. Word has length 46 [2020-10-29 09:17:44,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:17:44,966 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 182 transitions. [2020-10-29 09:17:44,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:17:44,966 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 182 transitions. [2020-10-29 09:17:44,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:17:44,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:17:44,967 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:17:44,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:17:44,968 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:17:44,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:17:44,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1445582472, now seen corresponding path program 1 times [2020-10-29 09:17:44,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:17:44,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121968031] [2020-10-29 09:17:44,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:17:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:44,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:45,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:45,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:45,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:46,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:46,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 09:17:46,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:17:46,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1512 [2020-10-29 09:17:46,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:46,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:46,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:17:46,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:17:46,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 09:17:46,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:46,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:46,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:46,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:46,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:46,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:46,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:17:46,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:46,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:46,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:46,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:46,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:46,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:46,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:17:46,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121968031] [2020-10-29 09:17:46,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:17:46,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:17:46,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482203456] [2020-10-29 09:17:46,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:17:46,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:46,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:17:46,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:17:46,707 INFO L87 Difference]: Start difference. First operand 157 states and 182 transitions. Second operand 9 states. [2020-10-29 09:17:48,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:17:48,362 INFO L93 Difference]: Finished difference Result 209 states and 249 transitions. [2020-10-29 09:17:48,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:17:48,363 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-10-29 09:17:48,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:17:48,365 INFO L225 Difference]: With dead ends: 209 [2020-10-29 09:17:48,366 INFO L226 Difference]: Without dead ends: 203 [2020-10-29 09:17:48,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:17:48,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-29 09:17:48,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 163. [2020-10-29 09:17:48,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-29 09:17:48,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 189 transitions. [2020-10-29 09:17:48,386 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 189 transitions. Word has length 46 [2020-10-29 09:17:48,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:17:48,387 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 189 transitions. [2020-10-29 09:17:48,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:17:48,387 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 189 transitions. [2020-10-29 09:17:48,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 09:17:48,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:17:48,388 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:17:48,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:17:48,388 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:17:48,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:17:48,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1245020584, now seen corresponding path program 1 times [2020-10-29 09:17:48,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:17:48,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323091014] [2020-10-29 09:17:48,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:17:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:48,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:48,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:48,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:49,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:49,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 09:17:49,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:17:49,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 600 [2020-10-29 09:17:49,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:49,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:49,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:17:49,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:17:49,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:17:49,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:49,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:49,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:49,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:49,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:49,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:49,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:17:49,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:49,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:49,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:49,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:49,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:49,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:49,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-29 09:17:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:49,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:49,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:49,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-29 09:17:49,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:49,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:17:49,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:49,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:49,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:17:49,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:49,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:17:49,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:49,166 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 09:17:49,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323091014] [2020-10-29 09:17:49,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:17:49,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 09:17:49,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523731908] [2020-10-29 09:17:49,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:17:49,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:49,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:17:49,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:17:49,168 INFO L87 Difference]: Start difference. First operand 163 states and 189 transitions. Second operand 8 states. [2020-10-29 09:17:50,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:17:50,304 INFO L93 Difference]: Finished difference Result 190 states and 223 transitions. [2020-10-29 09:17:50,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:17:50,306 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2020-10-29 09:17:50,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:17:50,308 INFO L225 Difference]: With dead ends: 190 [2020-10-29 09:17:50,308 INFO L226 Difference]: Without dead ends: 185 [2020-10-29 09:17:50,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:17:50,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-29 09:17:50,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 169. [2020-10-29 09:17:50,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-29 09:17:50,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 196 transitions. [2020-10-29 09:17:50,324 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 196 transitions. Word has length 49 [2020-10-29 09:17:50,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:17:50,325 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 196 transitions. [2020-10-29 09:17:50,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:17:50,325 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 196 transitions. [2020-10-29 09:17:50,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 09:17:50,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:17:50,326 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:17:50,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:17:50,326 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:17:50,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:17:50,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1416352510, now seen corresponding path program 1 times [2020-10-29 09:17:50,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:17:50,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178008390] [2020-10-29 09:17:50,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:17:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:50,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:50,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:50,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:50,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 09:17:50,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:17:50,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 653 [2020-10-29 09:17:50,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:50,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:50,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:17:50,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:17:50,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:17:50,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:51,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:51,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:51,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:51,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:51,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:51,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:51,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:17:51,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:51,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:51,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:51,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:51,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:51,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:51,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:17:51,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178008390] [2020-10-29 09:17:51,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:17:51,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:17:51,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097712605] [2020-10-29 09:17:51,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:17:51,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:51,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:17:51,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:17:51,541 INFO L87 Difference]: Start difference. First operand 169 states and 196 transitions. Second operand 13 states. [2020-10-29 09:17:54,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:17:54,462 INFO L93 Difference]: Finished difference Result 279 states and 330 transitions. [2020-10-29 09:17:54,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:17:54,464 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-29 09:17:54,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:17:54,466 INFO L225 Difference]: With dead ends: 279 [2020-10-29 09:17:54,466 INFO L226 Difference]: Without dead ends: 274 [2020-10-29 09:17:54,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:17:54,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-29 09:17:54,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 228. [2020-10-29 09:17:54,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-29 09:17:54,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 266 transitions. [2020-10-29 09:17:54,488 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 266 transitions. Word has length 49 [2020-10-29 09:17:54,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:17:54,488 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 266 transitions. [2020-10-29 09:17:54,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:17:54,488 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 266 transitions. [2020-10-29 09:17:54,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 09:17:54,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:17:54,489 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-29 09:17:54,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:17:54,490 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:17:54,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:17:54,490 INFO L82 PathProgramCache]: Analyzing trace with hash -2070768568, now seen corresponding path program 1 times [2020-10-29 09:17:54,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:17:54,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911927383] [2020-10-29 09:17:54,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:17:54,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:54,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:54,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:55,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:55,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 09:17:55,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:17:55,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 709 [2020-10-29 09:17:55,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:55,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:55,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:17:55,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:17:55,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 09:17:55,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:55,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:17:55,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:55,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:55,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:17:55,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:17:55,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:17:55,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:17:55,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:17:55,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:17:55,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:17:55,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:17:55,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:17:55,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:17:55,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:17:55,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911927383] [2020-10-29 09:17:55,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:17:55,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:17:55,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106670164] [2020-10-29 09:17:55,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:17:55,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:17:55,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:17:55,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:17:55,896 INFO L87 Difference]: Start difference. First operand 228 states and 266 transitions. Second operand 13 states. [2020-10-29 09:17:56,730 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-29 09:17:57,573 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-29 09:17:58,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:17:58,629 INFO L93 Difference]: Finished difference Result 323 states and 385 transitions. [2020-10-29 09:17:58,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:17:58,630 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-29 09:17:58,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:17:58,633 INFO L225 Difference]: With dead ends: 323 [2020-10-29 09:17:58,633 INFO L226 Difference]: Without dead ends: 224 [2020-10-29 09:17:58,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:17:58,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-29 09:17:58,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 209. [2020-10-29 09:17:58,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-29 09:17:58,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 239 transitions. [2020-10-29 09:17:58,653 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 239 transitions. Word has length 49 [2020-10-29 09:17:58,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:17:58,653 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 239 transitions. [2020-10-29 09:17:58,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:17:58,654 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 239 transitions. [2020-10-29 09:17:58,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:17:58,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:17:58,655 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:17:58,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:17:58,655 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:17:58,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:17:58,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1057963739, now seen corresponding path program 1 times [2020-10-29 09:17:58,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:17:58,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130196760] [2020-10-29 09:17:58,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:17:58,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:17:58,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:58,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:58,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:58,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:58,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:59,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:59,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:59,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:17:59,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:02,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:03,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:03,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 09:18:03,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 09:18:03,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 09:18:03,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:03,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:03,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:18:03,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:18:03,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 09:18:03,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:03,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:18:03,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:03,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:03,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:03,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:18:03,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:03,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:18:03,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:03,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:03,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:18:03,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:03,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:18:03,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:03,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-29 09:18:03,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:03,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:03,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:03,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:03,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:03,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-29 09:18:03,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:18:03,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-29 09:18:03,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:03,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:03,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:18:03,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:03,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:18:03,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:03,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-29 09:18:03,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:03,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:03,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:03,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 09:18:03,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:03,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:18:03,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:03,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:03,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:18:03,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-29 09:18:03,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:18:03,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:03,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:18:03,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130196760] [2020-10-29 09:18:03,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:18:03,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:18:03,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854662146] [2020-10-29 09:18:03,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:18:03,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:18:03,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:18:03,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:18:03,899 INFO L87 Difference]: Start difference. First operand 209 states and 239 transitions. Second operand 7 states. [2020-10-29 09:18:04,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:18:04,954 INFO L93 Difference]: Finished difference Result 270 states and 315 transitions. [2020-10-29 09:18:04,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:18:04,955 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-10-29 09:18:04,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:18:04,956 INFO L225 Difference]: With dead ends: 270 [2020-10-29 09:18:04,956 INFO L226 Difference]: Without dead ends: 218 [2020-10-29 09:18:04,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:18:04,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-29 09:18:04,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 209. [2020-10-29 09:18:04,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-29 09:18:04,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 238 transitions. [2020-10-29 09:18:04,989 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 238 transitions. Word has length 52 [2020-10-29 09:18:04,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:18:04,989 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 238 transitions. [2020-10-29 09:18:04,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:18:04,989 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 238 transitions. [2020-10-29 09:18:04,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:18:04,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:18:04,990 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:18:04,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:18:04,991 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:18:04,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:18:04,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1439250587, now seen corresponding path program 1 times [2020-10-29 09:18:04,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:18:04,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440184323] [2020-10-29 09:18:04,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:18:05,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:05,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:05,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:05,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:05,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 09:18:05,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:18:05,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 669 [2020-10-29 09:18:05,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:05,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:05,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:18:05,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:18:05,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:18:05,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:06,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:18:06,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:06,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:06,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:06,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:18:06,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:06,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:18:06,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:06,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:06,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:18:06,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:06,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:18:06,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:06,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:18:06,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440184323] [2020-10-29 09:18:06,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:18:06,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:18:06,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157004748] [2020-10-29 09:18:06,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:18:06,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:18:06,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:18:06,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:18:06,290 INFO L87 Difference]: Start difference. First operand 209 states and 238 transitions. Second operand 13 states. [2020-10-29 09:18:07,009 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-10-29 09:18:09,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:18:09,038 INFO L93 Difference]: Finished difference Result 254 states and 296 transitions. [2020-10-29 09:18:09,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:18:09,039 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-29 09:18:09,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:18:09,043 INFO L225 Difference]: With dead ends: 254 [2020-10-29 09:18:09,043 INFO L226 Difference]: Without dead ends: 249 [2020-10-29 09:18:09,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:18:09,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-29 09:18:09,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 215. [2020-10-29 09:18:09,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-29 09:18:09,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 244 transitions. [2020-10-29 09:18:09,069 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 244 transitions. Word has length 52 [2020-10-29 09:18:09,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:18:09,069 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 244 transitions. [2020-10-29 09:18:09,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:18:09,069 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 244 transitions. [2020-10-29 09:18:09,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 09:18:09,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:18:09,070 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:18:09,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:18:09,071 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:18:09,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:18:09,071 INFO L82 PathProgramCache]: Analyzing trace with hash -248068396, now seen corresponding path program 1 times [2020-10-29 09:18:09,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:18:09,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464985292] [2020-10-29 09:18:09,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:18:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:09,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:09,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:09,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:10,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:10,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 09:18:10,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:18:10,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1200 [2020-10-29 09:18:10,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:10,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:10,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:18:10,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:18:10,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 09:18:10,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:18:10,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:18:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:10,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:10,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:10,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:18:10,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:10,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:18:10,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:10,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:10,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:18:10,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:10,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:18:10,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:10,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-29 09:18:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:10,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:10,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:10,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:10,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-29 09:18:10,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:18:10,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 09:18:10,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:10,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:10,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:18:10,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:10,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:18:10,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:10,692 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 09:18:10,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464985292] [2020-10-29 09:18:10,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:18:10,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-29 09:18:10,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662426869] [2020-10-29 09:18:10,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:18:10,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:18:10,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:18:10,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:18:10,694 INFO L87 Difference]: Start difference. First operand 215 states and 244 transitions. Second operand 10 states. [2020-10-29 09:18:11,830 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 09:18:12,042 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-29 09:18:12,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:18:12,774 INFO L93 Difference]: Finished difference Result 246 states and 284 transitions. [2020-10-29 09:18:12,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:18:12,777 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-29 09:18:12,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:18:12,778 INFO L225 Difference]: With dead ends: 246 [2020-10-29 09:18:12,779 INFO L226 Difference]: Without dead ends: 239 [2020-10-29 09:18:12,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:18:12,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-29 09:18:12,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 219. [2020-10-29 09:18:12,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-29 09:18:12,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 248 transitions. [2020-10-29 09:18:12,801 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 248 transitions. Word has length 55 [2020-10-29 09:18:12,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:18:12,801 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 248 transitions. [2020-10-29 09:18:12,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:18:12,802 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 248 transitions. [2020-10-29 09:18:12,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 09:18:12,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:18:12,803 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:18:12,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:18:12,803 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:18:12,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:18:12,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1363773109, now seen corresponding path program 1 times [2020-10-29 09:18:12,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:18:12,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859246665] [2020-10-29 09:18:12,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:18:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:12,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:13,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:13,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 09:18:13,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:13,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 339 [2020-10-29 09:18:13,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:13,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:13,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:18:13,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:18:13,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 09:18:13,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:18:13,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:18:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:13,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:13,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:13,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:18:13,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:13,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:18:13,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:13,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:13,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:18:13,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:13,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:18:13,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:13,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:18:13,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859246665] [2020-10-29 09:18:13,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:18:13,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:18:13,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166654672] [2020-10-29 09:18:13,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:18:13,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:18:13,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:18:13,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:18:13,825 INFO L87 Difference]: Start difference. First operand 219 states and 248 transitions. Second operand 13 states. [2020-10-29 09:18:14,371 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-29 09:18:14,586 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-29 09:18:15,061 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-29 09:18:16,133 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-29 09:18:17,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:18:17,432 INFO L93 Difference]: Finished difference Result 257 states and 297 transitions. [2020-10-29 09:18:17,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:18:17,433 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-10-29 09:18:17,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:18:17,435 INFO L225 Difference]: With dead ends: 257 [2020-10-29 09:18:17,436 INFO L226 Difference]: Without dead ends: 252 [2020-10-29 09:18:17,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:18:17,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-29 09:18:17,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 222. [2020-10-29 09:18:17,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-29 09:18:17,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 250 transitions. [2020-10-29 09:18:17,467 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 250 transitions. Word has length 55 [2020-10-29 09:18:17,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:18:17,468 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 250 transitions. [2020-10-29 09:18:17,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:18:17,468 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 250 transitions. [2020-10-29 09:18:17,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 09:18:17,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:18:17,469 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1] [2020-10-29 09:18:17,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:18:17,469 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:18:17,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:18:17,470 INFO L82 PathProgramCache]: Analyzing trace with hash 301894933, now seen corresponding path program 2 times [2020-10-29 09:18:17,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:18:17,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632021295] [2020-10-29 09:18:17,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:18:17,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:17,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:17,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:17,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:19,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:19,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 09:18:19,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:18:19,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1795 [2020-10-29 09:18:19,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:19,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:19,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:18:19,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:18:19,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 09:18:19,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:19,689 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2020-10-29 09:18:20,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:18:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:20,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:20,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:20,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:18:20,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:20,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:18:20,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:20,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:20,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:18:20,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:20,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:18:20,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:18:20,054 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:18:20,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632021295] [2020-10-29 09:18:20,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:18:20,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:18:20,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694941148] [2020-10-29 09:18:20,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:18:20,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:18:20,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:18:20,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:18:20,056 INFO L87 Difference]: Start difference. First operand 222 states and 250 transitions. Second operand 14 states. [2020-10-29 09:18:20,635 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-10-29 09:18:20,938 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-10-29 09:18:21,179 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-10-29 09:18:23,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:18:23,252 INFO L93 Difference]: Finished difference Result 322 states and 375 transitions. [2020-10-29 09:18:23,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:18:23,253 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-10-29 09:18:23,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:18:23,256 INFO L225 Difference]: With dead ends: 322 [2020-10-29 09:18:23,256 INFO L226 Difference]: Without dead ends: 241 [2020-10-29 09:18:23,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:18:23,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-29 09:18:23,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 212. [2020-10-29 09:18:23,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-29 09:18:23,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 238 transitions. [2020-10-29 09:18:23,282 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 238 transitions. Word has length 55 [2020-10-29 09:18:23,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:18:23,282 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 238 transitions. [2020-10-29 09:18:23,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:18:23,282 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 238 transitions. [2020-10-29 09:18:23,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 09:18:23,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:18:23,283 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:18:23,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:18:23,283 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:18:23,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:18:23,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1109741151, now seen corresponding path program 2 times [2020-10-29 09:18:23,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:18:23,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271756060] [2020-10-29 09:18:23,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:18:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:23,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:23,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:23,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:24,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:24,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 09:18:24,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:18:24,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1449 [2020-10-29 09:18:24,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:24,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:24,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:18:24,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:18:24,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 09:18:24,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:25,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:18:25,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:25,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:25,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:25,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:18:25,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:25,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:18:25,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:25,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:25,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:18:25,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:25,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:18:25,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:25,145 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:18:25,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271756060] [2020-10-29 09:18:25,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:18:25,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:18:25,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243262832] [2020-10-29 09:18:25,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:18:25,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:18:25,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:18:25,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:18:25,151 INFO L87 Difference]: Start difference. First operand 212 states and 238 transitions. Second operand 14 states. [2020-10-29 09:18:28,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:18:28,444 INFO L93 Difference]: Finished difference Result 245 states and 281 transitions. [2020-10-29 09:18:28,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:18:28,448 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-10-29 09:18:28,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:18:28,450 INFO L225 Difference]: With dead ends: 245 [2020-10-29 09:18:28,450 INFO L226 Difference]: Without dead ends: 240 [2020-10-29 09:18:28,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:18:28,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-29 09:18:28,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 215. [2020-10-29 09:18:28,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-29 09:18:28,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 241 transitions. [2020-10-29 09:18:28,469 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 241 transitions. Word has length 55 [2020-10-29 09:18:28,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:18:28,470 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 241 transitions. [2020-10-29 09:18:28,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:18:28,470 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 241 transitions. [2020-10-29 09:18:28,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 09:18:28,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:18:28,471 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:18:28,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:18:28,471 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:18:28,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:18:28,471 INFO L82 PathProgramCache]: Analyzing trace with hash 926190343, now seen corresponding path program 1 times [2020-10-29 09:18:28,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:18:28,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644257080] [2020-10-29 09:18:28,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:18:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:28,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:28,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:28,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:28,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:28,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:28,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:28,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:29,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:33,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:33,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 09:18:33,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 09:18:33,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 09:18:33,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:33,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:33,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:18:33,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:18:33,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 09:18:33,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:33,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:18:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:33,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:33,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:33,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:18:33,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:33,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:18:33,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:33,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:33,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:18:33,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:33,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:18:33,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:33,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-29 09:18:33,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:33,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:33,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:33,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:33,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-29 09:18:33,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:18:33,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 09:18:33,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:33,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:33,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:18:33,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:33,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:18:33,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:33,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:18:33,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644257080] [2020-10-29 09:18:33,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:18:33,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-29 09:18:33,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543995440] [2020-10-29 09:18:33,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:18:33,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:18:33,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:18:33,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:18:33,778 INFO L87 Difference]: Start difference. First operand 215 states and 241 transitions. Second operand 10 states. [2020-10-29 09:18:35,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:18:35,516 INFO L93 Difference]: Finished difference Result 238 states and 272 transitions. [2020-10-29 09:18:35,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:18:35,517 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-10-29 09:18:35,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:18:35,518 INFO L225 Difference]: With dead ends: 238 [2020-10-29 09:18:35,519 INFO L226 Difference]: Without dead ends: 193 [2020-10-29 09:18:35,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:18:35,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-29 09:18:35,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 180. [2020-10-29 09:18:35,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-29 09:18:35,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 204 transitions. [2020-10-29 09:18:35,540 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 204 transitions. Word has length 58 [2020-10-29 09:18:35,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:18:35,540 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 204 transitions. [2020-10-29 09:18:35,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:18:35,540 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 204 transitions. [2020-10-29 09:18:35,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 09:18:35,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:18:35,541 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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] [2020-10-29 09:18:35,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:18:35,542 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:18:35,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:18:35,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1815524237, now seen corresponding path program 1 times [2020-10-29 09:18:35,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:18:35,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301058154] [2020-10-29 09:18:35,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:18:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:35,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:35,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:35,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:35,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:18:35,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:18:35,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 421 [2020-10-29 09:18:35,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:35,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:35,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:18:35,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 09:18:35,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:18:35,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:36,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:18:36,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:36,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:36,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:36,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:18:36,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:36,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:18:36,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:36,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:36,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:18:36,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:36,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:18:36,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:36,432 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 09:18:36,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301058154] [2020-10-29 09:18:36,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:18:36,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:18:36,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827909144] [2020-10-29 09:18:36,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:18:36,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:18:36,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:18:36,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:18:36,434 INFO L87 Difference]: Start difference. First operand 180 states and 204 transitions. Second operand 13 states. [2020-10-29 09:18:36,975 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-10-29 09:18:37,144 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2020-10-29 09:18:39,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:18:39,197 INFO L93 Difference]: Finished difference Result 206 states and 239 transitions. [2020-10-29 09:18:39,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:18:39,198 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 58 [2020-10-29 09:18:39,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:18:39,200 INFO L225 Difference]: With dead ends: 206 [2020-10-29 09:18:39,201 INFO L226 Difference]: Without dead ends: 201 [2020-10-29 09:18:39,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:18:39,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-29 09:18:39,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 183. [2020-10-29 09:18:39,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-29 09:18:39,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 207 transitions. [2020-10-29 09:18:39,222 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 207 transitions. Word has length 58 [2020-10-29 09:18:39,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:18:39,222 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 207 transitions. [2020-10-29 09:18:39,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:18:39,223 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 207 transitions. [2020-10-29 09:18:39,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 09:18:39,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:18:39,224 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2020-10-29 09:18:39,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:18:39,224 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:18:39,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:18:39,224 INFO L82 PathProgramCache]: Analyzing trace with hash 569666380, now seen corresponding path program 1 times [2020-10-29 09:18:39,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:18:39,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019104122] [2020-10-29 09:18:39,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:18:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:39,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:39,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:39,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 09:18:39,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:39,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-29 09:18:39,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:39,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:39,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:18:39,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:18:39,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 09:18:39,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:39,843 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-10-29 09:18:40,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:18:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:40,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:40,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:40,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:18:40,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:40,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:18:40,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:40,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:40,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:18:40,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:40,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:18:40,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:18:40,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019104122] [2020-10-29 09:18:40,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:18:40,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:18:40,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896360481] [2020-10-29 09:18:40,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:18:40,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:18:40,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:18:40,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:18:40,337 INFO L87 Difference]: Start difference. First operand 183 states and 207 transitions. Second operand 13 states. [2020-10-29 09:18:40,774 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-10-29 09:18:41,158 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2020-10-29 09:18:41,469 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2020-10-29 09:18:43,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:18:43,842 INFO L93 Difference]: Finished difference Result 205 states and 237 transitions. [2020-10-29 09:18:43,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:18:43,844 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-10-29 09:18:43,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:18:43,846 INFO L225 Difference]: With dead ends: 205 [2020-10-29 09:18:43,846 INFO L226 Difference]: Without dead ends: 200 [2020-10-29 09:18:43,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:18:43,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-29 09:18:43,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 186. [2020-10-29 09:18:43,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-29 09:18:43,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 210 transitions. [2020-10-29 09:18:43,870 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 210 transitions. Word has length 61 [2020-10-29 09:18:43,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:18:43,870 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 210 transitions. [2020-10-29 09:18:43,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:18:43,870 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 210 transitions. [2020-10-29 09:18:43,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 09:18:43,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:18:43,871 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:18:43,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:18:43,872 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:18:43,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:18:43,872 INFO L82 PathProgramCache]: Analyzing trace with hash -224609803, now seen corresponding path program 1 times [2020-10-29 09:18:43,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:18:43,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389182413] [2020-10-29 09:18:43,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:18:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:43,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:43,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:43,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:44,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:44,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:44,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:48,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:48,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 09:18:48,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:18:48,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 09:18:48,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:48,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:48,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:18:48,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:18:48,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 09:18:48,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:48,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:18:49,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:49,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:49,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:49,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:18:49,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:49,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:18:49,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:49,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:49,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:18:49,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:49,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:18:49,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:49,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-29 09:18:49,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:49,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:49,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:49,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:18:49,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:49,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:18:49,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:49,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:49,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:18:49,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:49,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:18:49,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:18:49,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389182413] [2020-10-29 09:18:49,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:18:49,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:18:49,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729031403] [2020-10-29 09:18:49,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:18:49,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:18:49,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:18:49,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:18:49,027 INFO L87 Difference]: Start difference. First operand 186 states and 210 transitions. Second operand 7 states. [2020-10-29 09:18:49,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:18:49,980 INFO L93 Difference]: Finished difference Result 199 states and 227 transitions. [2020-10-29 09:18:49,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:18:49,982 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-10-29 09:18:49,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:18:49,984 INFO L225 Difference]: With dead ends: 199 [2020-10-29 09:18:49,984 INFO L226 Difference]: Without dead ends: 188 [2020-10-29 09:18:49,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:18:49,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-29 09:18:50,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 180. [2020-10-29 09:18:50,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-29 09:18:50,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 203 transitions. [2020-10-29 09:18:50,002 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 203 transitions. Word has length 66 [2020-10-29 09:18:50,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:18:50,002 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 203 transitions. [2020-10-29 09:18:50,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:18:50,002 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 203 transitions. [2020-10-29 09:18:50,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 09:18:50,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:18:50,014 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 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] [2020-10-29 09:18:50,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:18:50,015 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:18:50,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:18:50,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1163585892, now seen corresponding path program 2 times [2020-10-29 09:18:50,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:18:50,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674294271] [2020-10-29 09:18:50,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:18:50,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:50,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:50,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:50,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:50,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:52,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:52,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 09:18:52,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:18:52,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2491 [2020-10-29 09:18:52,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:52,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:52,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:18:52,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:18:52,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 09:18:52,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:52,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:18:52,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:52,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:52,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:52,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:18:52,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:52,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:18:52,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:52,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:52,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:18:52,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:52,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:18:52,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:52,961 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:18:52,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674294271] [2020-10-29 09:18:52,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:18:52,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:18:52,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887305105] [2020-10-29 09:18:52,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:18:52,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:18:52,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:18:52,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:18:52,966 INFO L87 Difference]: Start difference. First operand 180 states and 203 transitions. Second operand 14 states. [2020-10-29 09:18:56,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:18:56,273 INFO L93 Difference]: Finished difference Result 235 states and 273 transitions. [2020-10-29 09:18:56,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:18:56,274 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2020-10-29 09:18:56,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:18:56,276 INFO L225 Difference]: With dead ends: 235 [2020-10-29 09:18:56,276 INFO L226 Difference]: Without dead ends: 229 [2020-10-29 09:18:56,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:18:56,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-29 09:18:56,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 186. [2020-10-29 09:18:56,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-29 09:18:56,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 210 transitions. [2020-10-29 09:18:56,302 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 210 transitions. Word has length 66 [2020-10-29 09:18:56,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:18:56,303 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 210 transitions. [2020-10-29 09:18:56,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:18:56,303 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 210 transitions. [2020-10-29 09:18:56,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 09:18:56,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:18:56,304 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 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] [2020-10-29 09:18:56,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:18:56,304 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:18:56,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:18:56,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1420436314, now seen corresponding path program 3 times [2020-10-29 09:18:56,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:18:56,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572312252] [2020-10-29 09:18:56,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:18:56,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:56,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:56,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:57,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:57,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 09:18:57,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:18:57,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1282 [2020-10-29 09:18:57,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:57,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:57,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:18:57,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:18:57,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 09:18:57,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:58,150 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2020-10-29 09:18:58,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:18:58,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:18:58,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:18:58,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:18:58,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:18:58,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:18:58,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:18:58,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:18:58,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:18:58,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:18:58,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:18:58,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:18:58,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:18:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:18:58,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572312252] [2020-10-29 09:18:58,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:18:58,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:18:58,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134298700] [2020-10-29 09:18:58,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:18:58,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:18:58,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:18:58,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:18:58,719 INFO L87 Difference]: Start difference. First operand 186 states and 210 transitions. Second operand 17 states. [2020-10-29 09:19:03,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:03,246 INFO L93 Difference]: Finished difference Result 311 states and 358 transitions. [2020-10-29 09:19:03,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:19:03,247 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 69 [2020-10-29 09:19:03,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:03,250 INFO L225 Difference]: With dead ends: 311 [2020-10-29 09:19:03,250 INFO L226 Difference]: Without dead ends: 306 [2020-10-29 09:19:03,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:19:03,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-29 09:19:03,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 259. [2020-10-29 09:19:03,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-29 09:19:03,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 294 transitions. [2020-10-29 09:19:03,277 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 294 transitions. Word has length 69 [2020-10-29 09:19:03,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:03,277 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 294 transitions. [2020-10-29 09:19:03,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:19:03,278 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 294 transitions. [2020-10-29 09:19:03,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 09:19:03,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:03,278 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-29 09:19:03,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:19:03,279 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:03,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:03,279 INFO L82 PathProgramCache]: Analyzing trace with hash -2066684764, now seen corresponding path program 3 times [2020-10-29 09:19:03,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:03,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267531853] [2020-10-29 09:19:03,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:03,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:03,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:03,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:04,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:04,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 09:19:04,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:19:04,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1074 [2020-10-29 09:19:04,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:04,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:04,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:19:04,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:19:04,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 09:19:04,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:04,710 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-10-29 09:19:05,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:05,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:05,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:05,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:05,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:05,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:19:05,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:05,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:05,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:05,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:05,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:05,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:05,440 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:19:05,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267531853] [2020-10-29 09:19:05,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:19:05,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:19:05,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674302096] [2020-10-29 09:19:05,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:19:05,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:05,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:19:05,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:19:05,442 INFO L87 Difference]: Start difference. First operand 259 states and 294 transitions. Second operand 17 states. [2020-10-29 09:19:05,874 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-10-29 09:19:06,174 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-10-29 09:19:06,705 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-29 09:19:09,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:09,710 INFO L93 Difference]: Finished difference Result 346 states and 402 transitions. [2020-10-29 09:19:09,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:19:09,711 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 69 [2020-10-29 09:19:09,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:09,712 INFO L225 Difference]: With dead ends: 346 [2020-10-29 09:19:09,712 INFO L226 Difference]: Without dead ends: 256 [2020-10-29 09:19:09,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:19:09,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-29 09:19:09,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 240. [2020-10-29 09:19:09,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-29 09:19:09,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 267 transitions. [2020-10-29 09:19:09,736 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 267 transitions. Word has length 69 [2020-10-29 09:19:09,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:09,737 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 267 transitions. [2020-10-29 09:19:09,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:19:09,737 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 267 transitions. [2020-10-29 09:19:09,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 09:19:09,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:09,738 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:19:09,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:19:09,738 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:09,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:09,739 INFO L82 PathProgramCache]: Analyzing trace with hash -707348791, now seen corresponding path program 1 times [2020-10-29 09:19:09,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:09,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116807936] [2020-10-29 09:19:09,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:09,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:09,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:09,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:09,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:09,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:09,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:09,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:09,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:10,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:10,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:10,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:10,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:11,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:12,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:12,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:12,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:12,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:12,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:14,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:14,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 09:19:14,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-29 09:19:14,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 09:19:14,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:14,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:14,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:19:14,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 09:19:14,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 09:19:14,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:14,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:14,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:14,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:14,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:14,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:14,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:14,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:19:14,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:14,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:14,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:14,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:14,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:14,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:14,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-29 09:19:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:14,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:14,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:14,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:14,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:14,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:19:14,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:19:14,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-29 09:19:14,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:14,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:14,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:19:14,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:14,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:19:14,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:14,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-29 09:19:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:14,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:14,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:14,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-29 09:19:14,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:14,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:19:14,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:14,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:14,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:19:14,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:19:14,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:19:14,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:15,020 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-29 09:19:15,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116807936] [2020-10-29 09:19:15,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:19:15,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 09:19:15,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735288897] [2020-10-29 09:19:15,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:19:15,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:15,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:19:15,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:19:15,035 INFO L87 Difference]: Start difference. First operand 240 states and 267 transitions. Second operand 8 states. [2020-10-29 09:19:15,754 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-10-29 09:19:16,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:16,460 INFO L93 Difference]: Finished difference Result 304 states and 349 transitions. [2020-10-29 09:19:16,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:19:16,462 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 72 [2020-10-29 09:19:16,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:16,465 INFO L225 Difference]: With dead ends: 304 [2020-10-29 09:19:16,465 INFO L226 Difference]: Without dead ends: 252 [2020-10-29 09:19:16,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:19:16,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-29 09:19:16,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 245. [2020-10-29 09:19:16,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-29 09:19:16,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 274 transitions. [2020-10-29 09:19:16,493 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 274 transitions. Word has length 72 [2020-10-29 09:19:16,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:16,493 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 274 transitions. [2020-10-29 09:19:16,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:19:16,494 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 274 transitions. [2020-10-29 09:19:16,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 09:19:16,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:16,495 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 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 09:19:16,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:19:16,495 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:16,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:16,496 INFO L82 PathProgramCache]: Analyzing trace with hash 717130429, now seen corresponding path program 1 times [2020-10-29 09:19:16,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:16,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478812908] [2020-10-29 09:19:16,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:16,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:16,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:16,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:16,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:16,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:16,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:16,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:18,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:21,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:21,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-29 09:19:21,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:19:21,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 09:19:21,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:21,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:21,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:19:21,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:19:21,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 09:19:21,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:21,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:21,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:21,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:21,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:21,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:21,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:19:21,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:21,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:21,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:21,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:21,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:21,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:21,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-29 09:19:21,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:21,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:21,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:21,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:19:21,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:21,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:19:21,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:21,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:21,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:19:21,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:21,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:19:21,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:21,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-29 09:19:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:21,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:21,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:21,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-29 09:19:21,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:21,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 09:19:21,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:21,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:21,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:19:21,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:19:21,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:19:21,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:21,808 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:19:21,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478812908] [2020-10-29 09:19:21,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:19:21,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:19:21,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499202280] [2020-10-29 09:19:21,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:19:21,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:21,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:19:21,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:19:21,810 INFO L87 Difference]: Start difference. First operand 245 states and 274 transitions. Second operand 10 states. [2020-10-29 09:19:23,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:23,432 INFO L93 Difference]: Finished difference Result 312 states and 359 transitions. [2020-10-29 09:19:23,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:19:23,433 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2020-10-29 09:19:23,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:23,435 INFO L225 Difference]: With dead ends: 312 [2020-10-29 09:19:23,435 INFO L226 Difference]: Without dead ends: 256 [2020-10-29 09:19:23,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:19:23,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-29 09:19:23,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 246. [2020-10-29 09:19:23,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-29 09:19:23,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 276 transitions. [2020-10-29 09:19:23,464 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 276 transitions. Word has length 73 [2020-10-29 09:19:23,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:23,464 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 276 transitions. [2020-10-29 09:19:23,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:19:23,464 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 276 transitions. [2020-10-29 09:19:23,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 09:19:23,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:23,465 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 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] [2020-10-29 09:19:23,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:19:23,466 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:23,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:23,466 INFO L82 PathProgramCache]: Analyzing trace with hash -37729911, now seen corresponding path program 2 times [2020-10-29 09:19:23,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:23,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719993084] [2020-10-29 09:19:23,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:23,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:23,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:24,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:24,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 09:19:24,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:19:24,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 721 [2020-10-29 09:19:24,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:24,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:24,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:19:24,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:19:24,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 09:19:24,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:24,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:24,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:24,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:24,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:24,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:24,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:24,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:19:24,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:24,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:24,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:24,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:24,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:24,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:24,972 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:19:24,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719993084] [2020-10-29 09:19:24,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:19:24,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:19:24,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404920248] [2020-10-29 09:19:24,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:19:24,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:24,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:19:24,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:19:24,974 INFO L87 Difference]: Start difference. First operand 246 states and 276 transitions. Second operand 17 states. [2020-10-29 09:19:25,585 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-10-29 09:19:25,795 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-10-29 09:19:26,097 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2020-10-29 09:19:26,351 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2020-10-29 09:19:29,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:29,916 INFO L93 Difference]: Finished difference Result 283 states and 320 transitions. [2020-10-29 09:19:29,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:19:29,917 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2020-10-29 09:19:29,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:29,919 INFO L225 Difference]: With dead ends: 283 [2020-10-29 09:19:29,919 INFO L226 Difference]: Without dead ends: 278 [2020-10-29 09:19:29,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:19:29,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-29 09:19:29,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 252. [2020-10-29 09:19:29,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-29 09:19:29,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 282 transitions. [2020-10-29 09:19:29,952 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 282 transitions. Word has length 72 [2020-10-29 09:19:29,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:29,952 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 282 transitions. [2020-10-29 09:19:29,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:19:29,952 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 282 transitions. [2020-10-29 09:19:29,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 09:19:29,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:29,954 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 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] [2020-10-29 09:19:29,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:19:29,954 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:29,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:29,955 INFO L82 PathProgramCache]: Analyzing trace with hash -38398809, now seen corresponding path program 2 times [2020-10-29 09:19:29,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:29,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546654073] [2020-10-29 09:19:29,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:30,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:30,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:30,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 09:19:30,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:30,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 617 [2020-10-29 09:19:30,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:30,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:30,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:19:30,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:19:30,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-29 09:19:30,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:31,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:31,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:31,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:31,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:31,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:31,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:31,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:19:31,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:31,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:31,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:31,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:31,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:31,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:31,569 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:19:31,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546654073] [2020-10-29 09:19:31,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:19:31,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:19:31,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381233797] [2020-10-29 09:19:31,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:19:31,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:31,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:19:31,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:19:31,571 INFO L87 Difference]: Start difference. First operand 252 states and 282 transitions. Second operand 17 states. [2020-10-29 09:19:32,190 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-29 09:19:32,594 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2020-10-29 09:19:33,286 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2020-10-29 09:19:33,830 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 101 [2020-10-29 09:19:37,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:37,980 INFO L93 Difference]: Finished difference Result 282 states and 317 transitions. [2020-10-29 09:19:37,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:19:37,981 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2020-10-29 09:19:37,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:37,982 INFO L225 Difference]: With dead ends: 282 [2020-10-29 09:19:37,982 INFO L226 Difference]: Without dead ends: 277 [2020-10-29 09:19:37,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:19:37,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-29 09:19:38,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 255. [2020-10-29 09:19:38,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-29 09:19:38,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 284 transitions. [2020-10-29 09:19:38,013 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 284 transitions. Word has length 75 [2020-10-29 09:19:38,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:38,013 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 284 transitions. [2020-10-29 09:19:38,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:19:38,013 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 284 transitions. [2020-10-29 09:19:38,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 09:19:38,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:38,015 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 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] [2020-10-29 09:19:38,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:19:38,015 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:38,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:38,016 INFO L82 PathProgramCache]: Analyzing trace with hash -648418319, now seen corresponding path program 4 times [2020-10-29 09:19:38,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:38,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031312516] [2020-10-29 09:19:38,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:38,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:38,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:38,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:38,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:41,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:41,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 09:19:41,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:19:41,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3481 [2020-10-29 09:19:41,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:41,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:41,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:19:41,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:19:41,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 09:19:41,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:42,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:42,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:42,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:42,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:42,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:42,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:42,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:19:42,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:42,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:42,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:42,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:42,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:42,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:42,672 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:19:42,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031312516] [2020-10-29 09:19:42,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:19:42,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:19:42,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693991846] [2020-10-29 09:19:42,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:19:42,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:42,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:19:42,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:19:42,674 INFO L87 Difference]: Start difference. First operand 255 states and 284 transitions. Second operand 18 states. [2020-10-29 09:19:43,115 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-10-29 09:19:43,292 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-10-29 09:19:43,732 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2020-10-29 09:19:43,973 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2020-10-29 09:19:44,333 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2020-10-29 09:19:44,598 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2020-10-29 09:19:48,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:48,340 INFO L93 Difference]: Finished difference Result 343 states and 393 transitions. [2020-10-29 09:19:48,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:19:48,341 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2020-10-29 09:19:48,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:48,344 INFO L225 Difference]: With dead ends: 343 [2020-10-29 09:19:48,344 INFO L226 Difference]: Without dead ends: 269 [2020-10-29 09:19:48,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:19:48,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-29 09:19:48,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 245. [2020-10-29 09:19:48,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-29 09:19:48,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 272 transitions. [2020-10-29 09:19:48,376 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 272 transitions. Word has length 75 [2020-10-29 09:19:48,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:48,376 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 272 transitions. [2020-10-29 09:19:48,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:19:48,377 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 272 transitions. [2020-10-29 09:19:48,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 09:19:48,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:48,378 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2020-10-29 09:19:48,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:19:48,378 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:48,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:48,378 INFO L82 PathProgramCache]: Analyzing trace with hash 159427899, now seen corresponding path program 4 times [2020-10-29 09:19:48,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:48,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716914353] [2020-10-29 09:19:48,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:48,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:48,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:48,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:48,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:51,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:51,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 09:19:51,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:19:51,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2745 [2020-10-29 09:19:51,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:51,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:51,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:19:51,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:19:51,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 09:19:51,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:51,709 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-10-29 09:19:51,852 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2020-10-29 09:19:52,047 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2020-10-29 09:19:52,241 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2020-10-29 09:19:52,682 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2020-10-29 09:19:52,839 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2020-10-29 09:19:53,028 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-10-29 09:19:53,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:53,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:53,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:53,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:53,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:53,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:19:53,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:53,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:53,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:53,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:53,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:53,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:19:53,225 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 22 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:19:53,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716914353] [2020-10-29 09:19:53,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:19:53,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:19:53,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975860529] [2020-10-29 09:19:53,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:19:53,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:53,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:19:53,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:19:53,227 INFO L87 Difference]: Start difference. First operand 245 states and 272 transitions. Second operand 18 states. [2020-10-29 09:19:53,717 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-29 09:19:53,947 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-29 09:19:54,178 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 33 [2020-10-29 09:19:54,430 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 39 [2020-10-29 09:19:54,695 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 44 [2020-10-29 09:19:55,088 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 46 [2020-10-29 09:19:55,393 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 51 [2020-10-29 09:19:55,765 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-29 09:19:56,506 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-29 09:19:57,724 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-29 09:19:59,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:59,242 INFO L93 Difference]: Finished difference Result 273 states and 305 transitions. [2020-10-29 09:19:59,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:19:59,244 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2020-10-29 09:19:59,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:59,246 INFO L225 Difference]: With dead ends: 273 [2020-10-29 09:19:59,246 INFO L226 Difference]: Without dead ends: 268 [2020-10-29 09:19:59,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:19:59,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-29 09:19:59,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 248. [2020-10-29 09:19:59,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-29 09:19:59,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 275 transitions. [2020-10-29 09:19:59,275 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 275 transitions. Word has length 75 [2020-10-29 09:19:59,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:59,276 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 275 transitions. [2020-10-29 09:19:59,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:19:59,276 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 275 transitions. [2020-10-29 09:19:59,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 09:19:59,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:59,277 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2020-10-29 09:19:59,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:19:59,277 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:59,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:59,278 INFO L82 PathProgramCache]: Analyzing trace with hash -837118159, now seen corresponding path program 2 times [2020-10-29 09:19:59,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:59,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990118148] [2020-10-29 09:19:59,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:59,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:59,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:00,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:00,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 09:20:00,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:20:00,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1325 [2020-10-29 09:20:00,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:00,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:00,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:20:00,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:20:00,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 09:20:00,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:01,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:20:01,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:01,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:01,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:01,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:20:01,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:20:01,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:20:01,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:01,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:01,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:20:01,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:20:01,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:20:01,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:01,422 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:20:01,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990118148] [2020-10-29 09:20:01,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:20:01,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:20:01,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151797563] [2020-10-29 09:20:01,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:20:01,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:20:01,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:20:01,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:20:01,424 INFO L87 Difference]: Start difference. First operand 248 states and 275 transitions. Second operand 17 states. [2020-10-29 09:20:01,995 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-29 09:20:02,196 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-29 09:20:02,503 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2020-10-29 09:20:02,736 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2020-10-29 09:20:06,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:20:06,236 INFO L93 Difference]: Finished difference Result 266 states and 296 transitions. [2020-10-29 09:20:06,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:20:06,237 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 78 [2020-10-29 09:20:06,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:20:06,239 INFO L225 Difference]: With dead ends: 266 [2020-10-29 09:20:06,240 INFO L226 Difference]: Without dead ends: 261 [2020-10-29 09:20:06,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:20:06,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-29 09:20:06,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 251. [2020-10-29 09:20:06,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-29 09:20:06,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 278 transitions. [2020-10-29 09:20:06,279 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 278 transitions. Word has length 78 [2020-10-29 09:20:06,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:20:06,279 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 278 transitions. [2020-10-29 09:20:06,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:20:06,279 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 278 transitions. [2020-10-29 09:20:06,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-29 09:20:06,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:20:06,280 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:20:06,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:20:06,281 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:20:06,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:20:06,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1870709935, now seen corresponding path program 1 times [2020-10-29 09:20:06,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:20:06,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049106863] [2020-10-29 09:20:06,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:20:06,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:06,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:06,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:06,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:06,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:08,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:08,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:08,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:08,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:08,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:09,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:11,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:11,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-29 09:20:11,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 09:20:11,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 09:20:11,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:11,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:11,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:20:11,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-29 09:20:11,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-29 09:20:11,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:11,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:20:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:11,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:11,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:11,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:20:11,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:20:11,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:20:11,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:11,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:11,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:20:11,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:20:11,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:20:11,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:11,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-29 09:20:11,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:11,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:11,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:11,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:11,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:11,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:20:11,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:20:11,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-29 09:20:11,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:11,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:11,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:20:11,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:20:11,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:20:11,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:11,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-29 09:20:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:11,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:11,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:11,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:11,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:11,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-29 09:20:11,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:20:11,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-29 09:20:11,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:11,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:11,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:20:11,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:20:11,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:20:11,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:11,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-29 09:20:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:11,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:11,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:11,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:11,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-29 09:20:11,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:20:11,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 09:20:11,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:11,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:11,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:20:11,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:20:11,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:20:11,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:11,919 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-29 09:20:11,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049106863] [2020-10-29 09:20:11,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:20:11,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-29 09:20:11,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989833235] [2020-10-29 09:20:11,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:20:11,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:20:11,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:20:11,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:20:11,921 INFO L87 Difference]: Start difference. First operand 251 states and 278 transitions. Second operand 11 states. [2020-10-29 09:20:14,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:20:14,033 INFO L93 Difference]: Finished difference Result 289 states and 326 transitions. [2020-10-29 09:20:14,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:20:14,034 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-10-29 09:20:14,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:20:14,037 INFO L225 Difference]: With dead ends: 289 [2020-10-29 09:20:14,037 INFO L226 Difference]: Without dead ends: 284 [2020-10-29 09:20:14,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:20:14,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-29 09:20:14,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 260. [2020-10-29 09:20:14,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-29 09:20:14,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 288 transitions. [2020-10-29 09:20:14,069 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 288 transitions. Word has length 83 [2020-10-29 09:20:14,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:20:14,070 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 288 transitions. [2020-10-29 09:20:14,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:20:14,070 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 288 transitions. [2020-10-29 09:20:14,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-29 09:20:14,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:20:14,071 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:20:14,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:20:14,071 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:20:14,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:20:14,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1196673752, now seen corresponding path program 2 times [2020-10-29 09:20:14,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:20:14,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992043238] [2020-10-29 09:20:14,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:20:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:14,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:14,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:14,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-29 09:20:14,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:20:14,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 811 [2020-10-29 09:20:14,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:14,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:14,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:20:14,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:20:14,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-29 09:20:14,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:16,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:20:16,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:16,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:16,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:16,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:20:16,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:20:16,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:20:16,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:16,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:16,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:20:16,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:20:16,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:20:16,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:20:16,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992043238] [2020-10-29 09:20:16,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:20:16,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:20:16,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577388982] [2020-10-29 09:20:16,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:20:16,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:20:16,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:20:16,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:20:16,055 INFO L87 Difference]: Start difference. First operand 260 states and 288 transitions. Second operand 17 states. [2020-10-29 09:20:16,703 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-10-29 09:20:17,118 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 88 [2020-10-29 09:20:17,381 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-29 09:20:17,965 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 96 [2020-10-29 09:20:18,468 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 98 [2020-10-29 09:20:18,816 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-29 09:20:23,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:20:23,091 INFO L93 Difference]: Finished difference Result 274 states and 304 transitions. [2020-10-29 09:20:23,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:20:23,092 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 81 [2020-10-29 09:20:23,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:20:23,094 INFO L225 Difference]: With dead ends: 274 [2020-10-29 09:20:23,094 INFO L226 Difference]: Without dead ends: 269 [2020-10-29 09:20:23,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:20:23,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-29 09:20:23,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 263. [2020-10-29 09:20:23,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-29 09:20:23,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 291 transitions. [2020-10-29 09:20:23,126 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 291 transitions. Word has length 81 [2020-10-29 09:20:23,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:20:23,126 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 291 transitions. [2020-10-29 09:20:23,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:20:23,126 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 291 transitions. [2020-10-29 09:20:23,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-29 09:20:23,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:20:23,128 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:20:23,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:20:23,128 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:20:23,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:20:23,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1210318301, now seen corresponding path program 1 times [2020-10-29 09:20:23,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:20:23,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331157205] [2020-10-29 09:20:23,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:20:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:23,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:23,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:23,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:23,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:25,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:25,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:28,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:28,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-29 09:20:28,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:20:28,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-29 09:20:28,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:28,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:28,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:20:28,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 09:20:28,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 09:20:28,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:28,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:20:28,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:28,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:28,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:28,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:20:28,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:20:28,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:20:28,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:28,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:28,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:20:28,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:20:28,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:20:28,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:28,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-29 09:20:28,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:28,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:28,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:28,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:28,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:20:28,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:20:28,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 09:20:28,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:28,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:28,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:20:28,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:20:28,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:20:28,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:28,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-29 09:20:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:28,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:28,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:28,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:28,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-29 09:20:28,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:20:28,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-29 09:20:28,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:28,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:28,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:20:28,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:20:28,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:20:28,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:28,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-29 09:20:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:28,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:28,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:28,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:28,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-29 09:20:28,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:20:28,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-29 09:20:28,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:28,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:28,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:20:28,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:20:28,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:20:28,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-29 09:20:28,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331157205] [2020-10-29 09:20:28,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:20:28,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:20:28,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132706676] [2020-10-29 09:20:28,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:20:28,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:20:28,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:20:28,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:20:28,707 INFO L87 Difference]: Start difference. First operand 263 states and 291 transitions. Second operand 12 states. [2020-10-29 09:20:31,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:20:31,024 INFO L93 Difference]: Finished difference Result 369 states and 440 transitions. [2020-10-29 09:20:31,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:20:31,026 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2020-10-29 09:20:31,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:20:31,028 INFO L225 Difference]: With dead ends: 369 [2020-10-29 09:20:31,028 INFO L226 Difference]: Without dead ends: 303 [2020-10-29 09:20:31,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:20:31,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-29 09:20:31,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 283. [2020-10-29 09:20:31,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-10-29 09:20:31,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 326 transitions. [2020-10-29 09:20:31,060 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 326 transitions. Word has length 86 [2020-10-29 09:20:31,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:20:31,061 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 326 transitions. [2020-10-29 09:20:31,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:20:31,061 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 326 transitions. [2020-10-29 09:20:31,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-29 09:20:31,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:20:31,079 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:20:31,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 09:20:31,079 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:20:31,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:20:31,079 INFO L82 PathProgramCache]: Analyzing trace with hash 869078592, now seen corresponding path program 3 times [2020-10-29 09:20:31,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:20:31,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028141978] [2020-10-29 09:20:31,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:20:31,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:31,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:31,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:31,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:31,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:36,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:36,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-29 09:20:36,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:20:36,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 09:20:36,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:36,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:36,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:20:36,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:20:36,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-29 09:20:36,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:37,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:20:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:37,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:37,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:37,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:20:37,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:20:37,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:20:37,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:37,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:37,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:20:37,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:20:37,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:20:37,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 20 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:20:37,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028141978] [2020-10-29 09:20:37,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:20:37,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:20:37,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201961470] [2020-10-29 09:20:37,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:20:37,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:20:37,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:20:37,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:20:37,146 INFO L87 Difference]: Start difference. First operand 283 states and 326 transitions. Second operand 18 states. [2020-10-29 09:20:37,739 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-29 09:20:38,167 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2020-10-29 09:20:38,433 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2020-10-29 09:20:38,813 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2020-10-29 09:20:39,107 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2020-10-29 09:20:43,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:20:43,145 INFO L93 Difference]: Finished difference Result 336 states and 389 transitions. [2020-10-29 09:20:43,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:20:43,147 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 86 [2020-10-29 09:20:43,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:20:43,149 INFO L225 Difference]: With dead ends: 336 [2020-10-29 09:20:43,149 INFO L226 Difference]: Without dead ends: 330 [2020-10-29 09:20:43,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:20:43,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-29 09:20:43,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 289. [2020-10-29 09:20:43,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-10-29 09:20:43,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 333 transitions. [2020-10-29 09:20:43,184 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 333 transitions. Word has length 86 [2020-10-29 09:20:43,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:20:43,184 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 333 transitions. [2020-10-29 09:20:43,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:20:43,184 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 333 transitions. [2020-10-29 09:20:43,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-29 09:20:43,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:20:43,186 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:20:43,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-29 09:20:43,186 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:20:43,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:20:43,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1784172854, now seen corresponding path program 5 times [2020-10-29 09:20:43,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:20:43,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587892284] [2020-10-29 09:20:43,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:20:43,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:43,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:43,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:45,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:45,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-29 09:20:45,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:20:45,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2529 [2020-10-29 09:20:45,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:45,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:45,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:20:45,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:20:45,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 09:20:45,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:47,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:20:47,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:20:47,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:20:47,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:20:47,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:20:47,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:20:47,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:20:47,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:20:47,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:20:47,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:20:47,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:20:47,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:20:47,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:20:47,092 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:20:47,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587892284] [2020-10-29 09:20:47,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:20:47,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:20:47,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537418018] [2020-10-29 09:20:47,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:20:47,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:20:47,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:20:47,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:20:47,093 INFO L87 Difference]: Start difference. First operand 289 states and 333 transitions. Second operand 21 states. [2020-10-29 09:20:47,959 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 09:20:48,472 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 72