/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/heap-data/calendar.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:08:59,939 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:08:59,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:08:59,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:08:59,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:08:59,981 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:08:59,983 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:08:59,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:08:59,988 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:08:59,989 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:08:59,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:08:59,992 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:08:59,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:08:59,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:08:59,995 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:08:59,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:08:59,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:08:59,999 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:09:00,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:09:00,003 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:09:00,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:09:00,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:09:00,008 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:09:00,009 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:09:00,013 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:09:00,013 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:09:00,013 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:09:00,015 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:09:00,015 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:09:00,016 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:09:00,017 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:09:00,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:09:00,022 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:09:00,023 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:09:00,024 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:09:00,025 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:09:00,026 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:09:00,030 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:09:00,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:09:00,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:09:00,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:09:00,035 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:09:00,106 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:09:00,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:09:00,108 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:09:00,109 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:09:00,110 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:09:00,110 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:09:00,110 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:09:00,110 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:09:00,110 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:09:00,111 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:09:00,111 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:09:00,112 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:09:00,112 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:09:00,113 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:09:00,113 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:09:00,113 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:09:00,113 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:09:00,113 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:09:00,114 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:09:00,114 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:09:00,114 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:09:00,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:09:00,115 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:09:00,115 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:09:00,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:09:00,116 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:09:00,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:09:00,116 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:09:00,116 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:09:00,116 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:09:00,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:09:00,533 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:09:00,536 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:09:00,538 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:09:00,538 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:09:00,539 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-data/calendar.i [2020-10-27 01:09:00,630 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6aa9e28e/b880b9cef26046439c4268af2bc48ca4/FLAG1c2e289c4 [2020-10-27 01:09:01,447 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:09:01,448 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-data/calendar.i [2020-10-27 01:09:01,463 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6aa9e28e/b880b9cef26046439c4268af2bc48ca4/FLAG1c2e289c4 [2020-10-27 01:09:01,703 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6aa9e28e/b880b9cef26046439c4268af2bc48ca4 [2020-10-27 01:09:01,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:09:01,716 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:09:01,720 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:09:01,720 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:09:01,724 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:09:01,725 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:09:01" (1/1) ... [2020-10-27 01:09:01,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29ec8d7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:09:01, skipping insertion in model container [2020-10-27 01:09:01,731 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:09:01" (1/1) ... [2020-10-27 01:09:01,739 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:09:01,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:09:02,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:09:02,139 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:09:02,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:09:02,241 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:09:02,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:09:02 WrapperNode [2020-10-27 01:09:02,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:09:02,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:09:02,243 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:09:02,243 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:09:02,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:09:02" (1/1) ... [2020-10-27 01:09:02,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:09:02" (1/1) ... [2020-10-27 01:09:02,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:09:02" (1/1) ... [2020-10-27 01:09:02,286 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:09:02" (1/1) ... [2020-10-27 01:09:02,301 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:09:02" (1/1) ... [2020-10-27 01:09:02,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:09:02" (1/1) ... [2020-10-27 01:09:02,312 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:09:02" (1/1) ... [2020-10-27 01:09:02,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:09:02,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:09:02,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:09:02,320 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:09:02,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:09:02" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:09:02,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:09:02,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:09:02,404 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:09:02,404 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 01:09:02,404 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 01:09:02,404 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:09:02,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:09:02,405 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:09:02,405 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:09:02,405 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:09:02,405 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:09:02,405 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:09:02,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:09:02,406 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 01:09:02,406 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 01:09:02,406 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 01:09:02,406 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 01:09:02,406 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 01:09:02,406 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 01:09:02,407 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 01:09:02,407 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 01:09:02,407 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 01:09:02,407 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 01:09:02,407 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 01:09:02,407 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 01:09:02,407 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 01:09:02,408 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 01:09:02,408 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 01:09:02,408 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 01:09:02,408 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 01:09:02,408 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 01:09:02,408 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 01:09:02,408 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 01:09:02,409 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 01:09:02,409 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 01:09:02,409 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 01:09:02,409 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 01:09:02,409 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 01:09:02,409 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 01:09:02,409 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 01:09:02,410 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 01:09:02,410 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 01:09:02,410 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 01:09:02,410 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 01:09:02,410 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 01:09:02,410 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 01:09:02,410 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 01:09:02,411 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 01:09:02,411 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 01:09:02,411 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 01:09:02,411 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 01:09:02,411 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 01:09:02,411 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 01:09:02,411 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 01:09:02,411 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 01:09:02,412 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 01:09:02,412 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 01:09:02,412 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 01:09:02,412 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 01:09:02,412 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 01:09:02,412 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 01:09:02,413 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 01:09:02,413 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 01:09:02,413 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 01:09:02,413 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 01:09:02,413 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:09:02,413 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 01:09:02,413 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 01:09:02,414 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 01:09:02,414 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 01:09:02,414 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 01:09:02,414 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 01:09:02,414 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 01:09:02,414 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 01:09:02,414 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 01:09:02,415 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 01:09:02,415 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 01:09:02,415 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 01:09:02,415 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 01:09:02,415 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 01:09:02,415 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 01:09:02,415 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 01:09:02,416 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 01:09:02,416 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 01:09:02,416 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 01:09:02,416 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 01:09:02,416 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 01:09:02,416 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 01:09:02,416 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 01:09:02,417 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 01:09:02,417 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 01:09:02,417 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 01:09:02,417 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 01:09:02,417 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 01:09:02,417 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 01:09:02,417 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 01:09:02,417 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 01:09:02,418 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 01:09:02,418 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 01:09:02,418 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 01:09:02,418 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 01:09:02,418 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 01:09:02,418 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 01:09:02,418 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 01:09:02,419 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 01:09:02,419 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 01:09:02,419 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 01:09:02,419 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 01:09:02,419 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 01:09:02,419 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 01:09:02,419 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 01:09:02,419 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 01:09:02,420 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 01:09:02,420 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 01:09:02,420 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 01:09:02,420 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 01:09:02,420 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 01:09:02,420 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:09:02,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:09:02,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:09:02,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:09:02,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:09:02,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:09:02,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:09:02,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:09:02,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:09:02,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:09:03,107 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:09:03,107 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 01:09:03,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:09:03 BoogieIcfgContainer [2020-10-27 01:09:03,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:09:03,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:09:03,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:09:03,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:09:03,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:09:01" (1/3) ... [2020-10-27 01:09:03,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a08e797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:09:03, skipping insertion in model container [2020-10-27 01:09:03,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:09:02" (2/3) ... [2020-10-27 01:09:03,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a08e797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:09:03, skipping insertion in model container [2020-10-27 01:09:03,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:09:03" (3/3) ... [2020-10-27 01:09:03,129 INFO L111 eAbstractionObserver]: Analyzing ICFG calendar.i [2020-10-27 01:09:03,144 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:09:03,149 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:09:03,165 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:09:03,211 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:09:03,213 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:09:03,213 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:09:03,213 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:09:03,213 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:09:03,213 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:09:03,214 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:09:03,214 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:09:03,240 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-27 01:09:03,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:09:03,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:03,252 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:03,253 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:03,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:03,263 INFO L82 PathProgramCache]: Analyzing trace with hash -909177362, now seen corresponding path program 1 times [2020-10-27 01:09:03,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:03,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183968541] [2020-10-27 01:09:03,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:03,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:03,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:03,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:03,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:09:03,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:09:03,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-27 01:09:03,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:03,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:09:03,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:03,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:09:03,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:09:03,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:03,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:03,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:03,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:03,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:03,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 01:09:03,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:03,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:03,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:03,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:03,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:03,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:03,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183968541] [2020-10-27 01:09:03,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:09:03,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:09:03,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048477865] [2020-10-27 01:09:03,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:09:03,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:03,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:09:03,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:09:03,995 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-10-27 01:09:04,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:04,269 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2020-10-27 01:09:04,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:09:04,271 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 01:09:04,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:04,279 INFO L225 Difference]: With dead ends: 56 [2020-10-27 01:09:04,279 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 01:09:04,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:09:04,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 01:09:04,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-27 01:09:04,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 01:09:04,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2020-10-27 01:09:04,327 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 16 [2020-10-27 01:09:04,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:04,327 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2020-10-27 01:09:04,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:09:04,328 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2020-10-27 01:09:04,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:09:04,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:04,329 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] [2020-10-27 01:09:04,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:09:04,330 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:04,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:04,331 INFO L82 PathProgramCache]: Analyzing trace with hash 99493644, now seen corresponding path program 1 times [2020-10-27 01:09:04,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:04,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876601713] [2020-10-27 01:09:04,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:04,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:04,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:05,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:05,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:09:05,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:09:05,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 730 [2020-10-27 01:09:05,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:05,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:09:05,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:09:05,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:09:05,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:05,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:05,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:05,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:05,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:05,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:05,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:09:05,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:05,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:05,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:05,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:05,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:05,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:05,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876601713] [2020-10-27 01:09:05,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:09:05,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 01:09:05,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481333504] [2020-10-27 01:09:05,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:09:05,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:05,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:09:05,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:09:05,246 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 8 states. [2020-10-27 01:09:05,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:05,621 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2020-10-27 01:09:05,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:09:05,622 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-27 01:09:05,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:05,625 INFO L225 Difference]: With dead ends: 55 [2020-10-27 01:09:05,625 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 01:09:05,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:09:05,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 01:09:05,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2020-10-27 01:09:05,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 01:09:05,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2020-10-27 01:09:05,638 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 23 [2020-10-27 01:09:05,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:05,638 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2020-10-27 01:09:05,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:09:05,639 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2020-10-27 01:09:05,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:09:05,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:05,640 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] [2020-10-27 01:09:05,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:09:05,640 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:05,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:05,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1640416206, now seen corresponding path program 1 times [2020-10-27 01:09:05,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:05,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013055597] [2020-10-27 01:09:05,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:05,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:05,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:06,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:06,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:09:06,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:09:06,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 454 [2020-10-27 01:09:06,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:06,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:09:06,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:09:06,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:09:06,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:06,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:06,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:06,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:06,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:06,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:06,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:09:06,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:06,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:06,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:06,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:06,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:06,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:06,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013055597] [2020-10-27 01:09:06,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:09:06,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 01:09:06,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12213251] [2020-10-27 01:09:06,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:09:06,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:06,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:09:06,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:09:06,325 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 8 states. [2020-10-27 01:09:06,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:06,692 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2020-10-27 01:09:06,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:09:06,692 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-27 01:09:06,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:06,694 INFO L225 Difference]: With dead ends: 45 [2020-10-27 01:09:06,694 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 01:09:06,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:09:06,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 01:09:06,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-27 01:09:06,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 01:09:06,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2020-10-27 01:09:06,702 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 25 [2020-10-27 01:09:06,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:06,703 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2020-10-27 01:09:06,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:09:06,703 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2020-10-27 01:09:06,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:09:06,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:06,704 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:06,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:09:06,705 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:06,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:06,705 INFO L82 PathProgramCache]: Analyzing trace with hash 749596250, now seen corresponding path program 1 times [2020-10-27 01:09:06,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:06,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361815391] [2020-10-27 01:09:06,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:06,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:06,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:06,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:07,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:07,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:09:07,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:09:07,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 592 [2020-10-27 01:09:07,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:07,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:09:07,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:07,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:09:07,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:07,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:07,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:07,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:07,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:07,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:07,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:07,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:09:07,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:07,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:07,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:07,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:07,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:07,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361815391] [2020-10-27 01:09:07,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:07,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:09:07,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116166689] [2020-10-27 01:09:07,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:09:07,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:07,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:09:07,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:09:07,505 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand 7 states. [2020-10-27 01:09:07,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:07,799 INFO L93 Difference]: Finished difference Result 69 states and 87 transitions. [2020-10-27 01:09:07,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:09:07,801 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-10-27 01:09:07,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:07,802 INFO L225 Difference]: With dead ends: 69 [2020-10-27 01:09:07,802 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 01:09:07,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:09:07,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 01:09:07,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-27 01:09:07,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 01:09:07,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2020-10-27 01:09:07,821 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 31 [2020-10-27 01:09:07,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:07,822 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2020-10-27 01:09:07,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:09:07,822 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2020-10-27 01:09:07,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:09:07,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:07,824 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:07,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:09:07,826 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:07,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:07,828 INFO L82 PathProgramCache]: Analyzing trace with hash 710523211, now seen corresponding path program 2 times [2020-10-27 01:09:07,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:07,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804245339] [2020-10-27 01:09:07,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:07,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:07,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:08,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:09,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:09,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:09:09,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:09:09,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1714 [2020-10-27 01:09:09,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:09,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:09:09,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:09:09,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:09:09,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:09,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:09,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:09,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:09,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:09,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:09,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:09:09,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:09,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:09,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:09,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:09,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:09,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:09,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804245339] [2020-10-27 01:09:09,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:09,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:09:09,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573742300] [2020-10-27 01:09:09,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:09:09,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:09,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:09:09,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:09:09,772 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 10 states. [2020-10-27 01:09:10,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:10,507 INFO L93 Difference]: Finished difference Result 80 states and 101 transitions. [2020-10-27 01:09:10,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:09:10,508 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-27 01:09:10,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:10,511 INFO L225 Difference]: With dead ends: 80 [2020-10-27 01:09:10,511 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 01:09:10,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:09:10,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 01:09:10,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2020-10-27 01:09:10,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 01:09:10,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2020-10-27 01:09:10,530 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 36 [2020-10-27 01:09:10,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:10,530 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2020-10-27 01:09:10,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:09:10,531 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2020-10-27 01:09:10,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:09:10,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:10,532 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 01:09:10,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:09:10,532 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:10,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:10,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1443445425, now seen corresponding path program 1 times [2020-10-27 01:09:10,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:10,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251554867] [2020-10-27 01:09:10,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:10,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:10,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:10,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:10,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:12,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:12,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:09:12,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:09:12,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1913 [2020-10-27 01:09:12,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:12,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:09:12,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:09:12,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:09:12,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:12,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:12,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:12,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:12,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:12,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:12,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:12,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:09:12,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:12,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:12,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:12,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:12,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:12,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251554867] [2020-10-27 01:09:12,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:12,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:09:12,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460231895] [2020-10-27 01:09:12,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:09:12,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:12,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:09:12,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:09:12,791 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand 10 states. [2020-10-27 01:09:13,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:13,528 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2020-10-27 01:09:13,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:09:13,529 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-27 01:09:13,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:13,530 INFO L225 Difference]: With dead ends: 60 [2020-10-27 01:09:13,531 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 01:09:13,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:09:13,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 01:09:13,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2020-10-27 01:09:13,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 01:09:13,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2020-10-27 01:09:13,548 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 38 [2020-10-27 01:09:13,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:13,549 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2020-10-27 01:09:13,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:09:13,549 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2020-10-27 01:09:13,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:09:13,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:13,553 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 01:09:13,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:09:13,557 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:13,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:13,558 INFO L82 PathProgramCache]: Analyzing trace with hash 977195417, now seen corresponding path program 3 times [2020-10-27 01:09:13,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:13,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073455768] [2020-10-27 01:09:13,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:13,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:13,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:13,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:13,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:17,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:17,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:09:17,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:09:17,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3890 [2020-10-27 01:09:17,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:17,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:09:17,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:17,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:09:17,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:17,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:17,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:17,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:17,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:17,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:17,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:09:17,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:17,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:17,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:17,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:17,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:17,644 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:17,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073455768] [2020-10-27 01:09:17,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:17,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:09:17,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104884383] [2020-10-27 01:09:17,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:09:17,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:17,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:09:17,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:09:17,647 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand 9 states. [2020-10-27 01:09:18,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:18,039 INFO L93 Difference]: Finished difference Result 90 states and 114 transitions. [2020-10-27 01:09:18,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:09:18,040 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2020-10-27 01:09:18,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:18,043 INFO L225 Difference]: With dead ends: 90 [2020-10-27 01:09:18,043 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 01:09:18,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:09:18,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 01:09:18,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-27 01:09:18,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 01:09:18,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2020-10-27 01:09:18,066 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 44 [2020-10-27 01:09:18,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:18,066 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2020-10-27 01:09:18,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:09:18,067 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2020-10-27 01:09:18,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:09:18,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:18,070 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:18,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:09:18,070 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:18,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:18,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1386867128, now seen corresponding path program 4 times [2020-10-27 01:09:18,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:18,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808727769] [2020-10-27 01:09:18,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:18,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:18,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:18,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:18,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:23,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:23,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:09:23,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:09:23,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 01:09:23,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:23,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:09:23,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:09:23,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:09:23,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:23,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:23,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:23,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:23,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:23,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:23,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:23,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:09:23,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:23,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:23,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:23,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:23,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:23,385 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:23,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808727769] [2020-10-27 01:09:23,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:23,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:09:23,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823206181] [2020-10-27 01:09:23,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:09:23,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:23,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:09:23,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:09:23,388 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand 12 states. [2020-10-27 01:09:24,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:24,828 INFO L93 Difference]: Finished difference Result 93 states and 118 transitions. [2020-10-27 01:09:24,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:09:24,830 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-27 01:09:24,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:24,832 INFO L225 Difference]: With dead ends: 93 [2020-10-27 01:09:24,835 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 01:09:24,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:09:24,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 01:09:24,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-10-27 01:09:24,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 01:09:24,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2020-10-27 01:09:24,856 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 49 [2020-10-27 01:09:24,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:24,856 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2020-10-27 01:09:24,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:09:24,857 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2020-10-27 01:09:24,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:09:24,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:24,857 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:24,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:09:24,858 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:24,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:24,858 INFO L82 PathProgramCache]: Analyzing trace with hash 190991470, now seen corresponding path program 2 times [2020-10-27 01:09:24,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:24,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349965208] [2020-10-27 01:09:24,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:24,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:24,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:24,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:25,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:29,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:29,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 01:09:29,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:09:29,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 01:09:29,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:29,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:09:29,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:09:29,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:09:29,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:30,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:30,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:30,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:30,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:30,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:30,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:30,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:09:30,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:30,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:30,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:30,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:30,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:30,190 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:30,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349965208] [2020-10-27 01:09:30,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:30,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:09:30,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019349654] [2020-10-27 01:09:30,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:09:30,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:30,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:09:30,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:09:30,194 INFO L87 Difference]: Start difference. First operand 61 states and 78 transitions. Second operand 12 states. [2020-10-27 01:09:30,630 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2020-10-27 01:09:30,839 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 99 [2020-10-27 01:09:30,990 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 98 [2020-10-27 01:09:31,266 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-10-27 01:09:32,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:32,005 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2020-10-27 01:09:32,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:09:32,006 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-27 01:09:32,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:32,007 INFO L225 Difference]: With dead ends: 73 [2020-10-27 01:09:32,007 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 01:09:32,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:09:32,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 01:09:32,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2020-10-27 01:09:32,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 01:09:32,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2020-10-27 01:09:32,022 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 51 [2020-10-27 01:09:32,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:32,022 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2020-10-27 01:09:32,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:09:32,023 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2020-10-27 01:09:32,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 01:09:32,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:32,026 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:32,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:09:32,027 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:32,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:32,027 INFO L82 PathProgramCache]: Analyzing trace with hash 549511574, now seen corresponding path program 5 times [2020-10-27 01:09:32,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:32,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117851913] [2020-10-27 01:09:32,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:32,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:32,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:32,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:32,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:37,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:37,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 01:09:37,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:09:37,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 01:09:37,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:37,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:09:37,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:37,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 01:09:37,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:37,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:37,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:37,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:37,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:37,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:37,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:37,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:09:37,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:37,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:37,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:37,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:37,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:37,325 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:37,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117851913] [2020-10-27 01:09:37,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:37,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:09:37,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471251589] [2020-10-27 01:09:37,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:09:37,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:37,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:09:37,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:09:37,327 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand 11 states. [2020-10-27 01:09:37,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:37,874 INFO L93 Difference]: Finished difference Result 111 states and 141 transitions. [2020-10-27 01:09:37,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:09:37,875 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-27 01:09:37,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:37,877 INFO L225 Difference]: With dead ends: 111 [2020-10-27 01:09:37,877 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 01:09:37,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:09:37,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 01:09:37,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-27 01:09:37,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 01:09:37,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 89 transitions. [2020-10-27 01:09:37,900 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 89 transitions. Word has length 57 [2020-10-27 01:09:37,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:37,901 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 89 transitions. [2020-10-27 01:09:37,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:09:37,906 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 89 transitions. [2020-10-27 01:09:37,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 01:09:37,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:37,907 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:37,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:09:37,907 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:37,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:37,909 INFO L82 PathProgramCache]: Analyzing trace with hash -80416441, now seen corresponding path program 6 times [2020-10-27 01:09:37,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:37,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682435763] [2020-10-27 01:09:37,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:37,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:37,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:38,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:40,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:40,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:42,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:42,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:09:42,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:09:42,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 01:09:42,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:42,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:09:42,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:09:42,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 01:09:42,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:43,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:43,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:43,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:43,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:43,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:43,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:09:43,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:43,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:43,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:43,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:43,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:43,385 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 18 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:43,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682435763] [2020-10-27 01:09:43,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:43,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:09:43,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853257783] [2020-10-27 01:09:43,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:09:43,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:43,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:09:43,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:09:43,390 INFO L87 Difference]: Start difference. First operand 69 states and 89 transitions. Second operand 14 states. [2020-10-27 01:09:44,024 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 01:09:44,453 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 120 [2020-10-27 01:09:44,715 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 122 [2020-10-27 01:09:45,196 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 107 [2020-10-27 01:09:45,431 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 109 [2020-10-27 01:09:45,813 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 94 [2020-10-27 01:09:45,991 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 96 [2020-10-27 01:09:46,352 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2020-10-27 01:09:46,525 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2020-10-27 01:09:46,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:46,857 INFO L93 Difference]: Finished difference Result 106 states and 135 transitions. [2020-10-27 01:09:46,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:09:46,858 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-27 01:09:46,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:46,859 INFO L225 Difference]: With dead ends: 106 [2020-10-27 01:09:46,859 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 01:09:46,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:09:46,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 01:09:46,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 74. [2020-10-27 01:09:46,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 01:09:46,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2020-10-27 01:09:46,879 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 62 [2020-10-27 01:09:46,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:46,879 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2020-10-27 01:09:46,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:09:46,881 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2020-10-27 01:09:46,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 01:09:46,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:46,882 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:46,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:09:46,883 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:46,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:46,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1559651245, now seen corresponding path program 3 times [2020-10-27 01:09:46,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:46,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346620810] [2020-10-27 01:09:46,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:46,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:46,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:46,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:47,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:51,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:51,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 01:09:51,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:09:51,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 01:09:51,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:51,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:09:51,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 01:09:51,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:09:51,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:51,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:51,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:51,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:51,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:51,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:51,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:51,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:09:51,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:51,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:51,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:51,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:51,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:52,012 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-27 01:09:52,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346620810] [2020-10-27 01:09:52,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:09:52,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:09:52,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840816648] [2020-10-27 01:09:52,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:09:52,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:52,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:09:52,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:09:52,014 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand 6 states. [2020-10-27 01:09:52,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:52,133 INFO L93 Difference]: Finished difference Result 143 states and 177 transitions. [2020-10-27 01:09:52,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:09:52,133 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-27 01:09:52,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:52,134 INFO L225 Difference]: With dead ends: 143 [2020-10-27 01:09:52,134 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 01:09:52,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:09:52,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 01:09:52,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 86. [2020-10-27 01:09:52,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 01:09:52,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 107 transitions. [2020-10-27 01:09:52,149 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 107 transitions. Word has length 64 [2020-10-27 01:09:52,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:52,149 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 107 transitions. [2020-10-27 01:09:52,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:09:52,149 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 107 transitions. [2020-10-27 01:09:52,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 01:09:52,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:52,150 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:52,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:09:52,151 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:52,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:52,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1470079337, now seen corresponding path program 1 times [2020-10-27 01:09:52,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:52,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625954605] [2020-10-27 01:09:52,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:52,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:52,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:52,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:52,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 01:09:52,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:52,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 403 [2020-10-27 01:09:52,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:52,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:09:52,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:09:52,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 01:09:52,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:52,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:52,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:52,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:52,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:52,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:52,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:52,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:09:52,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:52,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:52,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:52,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:52,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:52,940 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 18 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:52,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625954605] [2020-10-27 01:09:52,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:52,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:09:52,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229629047] [2020-10-27 01:09:52,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:09:52,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:52,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:09:52,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:09:52,945 INFO L87 Difference]: Start difference. First operand 86 states and 107 transitions. Second operand 14 states. [2020-10-27 01:09:54,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:54,980 INFO L93 Difference]: Finished difference Result 99 states and 121 transitions. [2020-10-27 01:09:54,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:09:54,980 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 64 [2020-10-27 01:09:54,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:54,981 INFO L225 Difference]: With dead ends: 99 [2020-10-27 01:09:54,982 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 01:09:54,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=285, Invalid=645, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:09:54,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 01:09:54,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-10-27 01:09:54,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 01:09:54,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 111 transitions. [2020-10-27 01:09:54,992 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 111 transitions. Word has length 64 [2020-10-27 01:09:54,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:54,992 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 111 transitions. [2020-10-27 01:09:54,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:09:54,993 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 111 transitions. [2020-10-27 01:09:54,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 01:09:54,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:54,993 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:54,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:09:54,994 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:54,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:54,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1343734925, now seen corresponding path program 1 times [2020-10-27 01:09:54,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:54,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730889394] [2020-10-27 01:09:54,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:55,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:55,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:55,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:55,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 01:09:55,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:55,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 381 [2020-10-27 01:09:55,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:55,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:09:55,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:55,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 01:09:55,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:55,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:55,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:55,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:55,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:55,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:55,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:55,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:55,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:55,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:55,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:55,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:55,815 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 16 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:55,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730889394] [2020-10-27 01:09:55,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:55,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:09:55,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547958134] [2020-10-27 01:09:55,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:09:55,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:55,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:09:55,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:09:55,817 INFO L87 Difference]: Start difference. First operand 89 states and 111 transitions. Second operand 13 states. [2020-10-27 01:09:56,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:56,625 INFO L93 Difference]: Finished difference Result 157 states and 193 transitions. [2020-10-27 01:09:56,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:09:56,626 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 70 [2020-10-27 01:09:56,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:56,627 INFO L225 Difference]: With dead ends: 157 [2020-10-27 01:09:56,627 INFO L226 Difference]: Without dead ends: 94 [2020-10-27 01:09:56,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:09:56,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-27 01:09:56,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-27 01:09:56,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 01:09:56,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 118 transitions. [2020-10-27 01:09:56,639 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 118 transitions. Word has length 70 [2020-10-27 01:09:56,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:56,639 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 118 transitions. [2020-10-27 01:09:56,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:09:56,639 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 118 transitions. [2020-10-27 01:09:56,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 01:09:56,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:56,640 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:56,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:09:56,641 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:56,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:56,641 INFO L82 PathProgramCache]: Analyzing trace with hash 994868348, now seen corresponding path program 2 times [2020-10-27 01:09:56,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:56,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065120688] [2020-10-27 01:09:56,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:56,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:57,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:57,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:57,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 01:09:57,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:09:57,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 876 [2020-10-27 01:09:57,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:57,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:09:57,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:09:57,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 01:09:57,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:58,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:58,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:58,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:58,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:58,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:58,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:58,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:09:58,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:58,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:58,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:58,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:58,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:58,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065120688] [2020-10-27 01:09:58,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:58,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:09:58,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792010893] [2020-10-27 01:09:58,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:09:58,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:58,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:09:58,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:09:58,197 INFO L87 Difference]: Start difference. First operand 94 states and 118 transitions. Second operand 16 states. [2020-10-27 01:09:58,900 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2020-10-27 01:09:59,254 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 145 [2020-10-27 01:09:59,651 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 148 [2020-10-27 01:10:00,050 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 147 [2020-10-27 01:10:00,424 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 149 [2020-10-27 01:10:00,738 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 132 [2020-10-27 01:10:01,081 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 135 [2020-10-27 01:10:01,402 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 134 [2020-10-27 01:10:01,717 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 136 [2020-10-27 01:10:01,982 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 119 [2020-10-27 01:10:02,271 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2020-10-27 01:10:02,557 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 121 [2020-10-27 01:10:02,843 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 123 [2020-10-27 01:10:03,082 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 106 [2020-10-27 01:10:03,346 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 109 [2020-10-27 01:10:03,597 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 108 [2020-10-27 01:10:03,845 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 110 [2020-10-27 01:10:04,096 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 93 [2020-10-27 01:10:04,388 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 96 [2020-10-27 01:10:04,613 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 95 [2020-10-27 01:10:04,860 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2020-10-27 01:10:05,106 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-10-27 01:10:05,323 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2020-10-27 01:10:05,531 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-10-27 01:10:05,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:05,542 INFO L93 Difference]: Finished difference Result 132 states and 164 transitions. [2020-10-27 01:10:05,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:10:05,542 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2020-10-27 01:10:05,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:05,544 INFO L225 Difference]: With dead ends: 132 [2020-10-27 01:10:05,544 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 01:10:05,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=559, Invalid=1247, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:10:05,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 01:10:05,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 102. [2020-10-27 01:10:05,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 01:10:05,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 127 transitions. [2020-10-27 01:10:05,558 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 127 transitions. Word has length 75 [2020-10-27 01:10:05,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:05,558 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 127 transitions. [2020-10-27 01:10:05,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:10:05,558 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 127 transitions. [2020-10-27 01:10:05,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 01:10:05,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:05,559 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:05,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:10:05,559 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:05,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:05,560 INFO L82 PathProgramCache]: Analyzing trace with hash 501273508, now seen corresponding path program 2 times [2020-10-27 01:10:05,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:05,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971294241] [2020-10-27 01:10:05,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:05,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:06,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:06,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 01:10:06,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:06,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 936 [2020-10-27 01:10:06,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:06,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:10:06,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:10:06,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 01:10:06,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:07,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:07,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:07,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:07,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:07,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:07,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:07,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:10:07,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:07,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:07,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:07,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:07,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:07,124 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 23 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:07,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971294241] [2020-10-27 01:10:07,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:07,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:10:07,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125014275] [2020-10-27 01:10:07,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:10:07,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:07,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:10:07,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:10:07,126 INFO L87 Difference]: Start difference. First operand 102 states and 127 transitions. Second operand 16 states. [2020-10-27 01:10:07,474 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-10-27 01:10:07,765 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-10-27 01:10:08,179 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 86 [2020-10-27 01:10:08,626 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 100 [2020-10-27 01:10:09,230 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 168 [2020-10-27 01:10:09,932 WARN L193 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 173 [2020-10-27 01:10:10,546 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 172 [2020-10-27 01:10:11,107 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 154 [2020-10-27 01:10:11,734 WARN L193 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 159 [2020-10-27 01:10:12,311 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 158 [2020-10-27 01:10:12,862 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 140 [2020-10-27 01:10:13,415 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 145 [2020-10-27 01:10:13,923 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 144 [2020-10-27 01:10:14,459 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 126 [2020-10-27 01:10:15,043 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 131 [2020-10-27 01:10:15,583 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 130 [2020-10-27 01:10:16,047 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 112 [2020-10-27 01:10:16,551 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 117 [2020-10-27 01:10:17,039 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 116 [2020-10-27 01:10:17,529 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 102 [2020-10-27 01:10:18,032 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 104 [2020-10-27 01:10:18,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:18,098 INFO L93 Difference]: Finished difference Result 115 states and 141 transitions. [2020-10-27 01:10:18,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:10:18,100 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 77 [2020-10-27 01:10:18,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:18,101 INFO L225 Difference]: With dead ends: 115 [2020-10-27 01:10:18,101 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 01:10:18,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=410, Invalid=922, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:10:18,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 01:10:18,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 105. [2020-10-27 01:10:18,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 01:10:18,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 131 transitions. [2020-10-27 01:10:18,115 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 131 transitions. Word has length 77 [2020-10-27 01:10:18,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:18,116 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 131 transitions. [2020-10-27 01:10:18,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:10:18,117 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 131 transitions. [2020-10-27 01:10:18,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 01:10:18,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:18,118 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:18,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:10:18,118 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:18,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:18,119 INFO L82 PathProgramCache]: Analyzing trace with hash -902095224, now seen corresponding path program 3 times [2020-10-27 01:10:18,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:18,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176301882] [2020-10-27 01:10:18,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:18,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:18,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:18,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 01:10:18,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:18,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 702 [2020-10-27 01:10:18,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:18,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:10:18,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:18,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 01:10:18,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:19,413 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-27 01:10:19,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:19,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:19,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:19,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:19,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:19,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:19,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:10:19,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:19,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:19,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:19,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:19,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:19,951 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 20 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:19,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176301882] [2020-10-27 01:10:19,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:19,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:10:19,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970885193] [2020-10-27 01:10:19,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:10:19,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:19,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:10:19,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:10:19,957 INFO L87 Difference]: Start difference. First operand 105 states and 131 transitions. Second operand 15 states. [2020-10-27 01:10:21,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:21,188 INFO L93 Difference]: Finished difference Result 184 states and 226 transitions. [2020-10-27 01:10:21,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:10:21,188 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2020-10-27 01:10:21,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:21,190 INFO L225 Difference]: With dead ends: 184 [2020-10-27 01:10:21,190 INFO L226 Difference]: Without dead ends: 110 [2020-10-27 01:10:21,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:10:21,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-27 01:10:21,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-10-27 01:10:21,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-27 01:10:21,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 138 transitions. [2020-10-27 01:10:21,203 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 138 transitions. Word has length 83 [2020-10-27 01:10:21,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:21,203 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 138 transitions. [2020-10-27 01:10:21,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:10:21,204 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 138 transitions. [2020-10-27 01:10:21,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-27 01:10:21,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:21,205 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:21,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:10:21,205 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:21,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:21,205 INFO L82 PathProgramCache]: Analyzing trace with hash 481755897, now seen corresponding path program 4 times [2020-10-27 01:10:21,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:21,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331522731] [2020-10-27 01:10:21,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:21,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:21,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:22,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:23,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:23,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 01:10:23,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:10:23,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2648 [2020-10-27 01:10:23,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:23,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:10:23,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:10:23,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 01:10:23,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:24,493 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-10-27 01:10:24,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:24,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:24,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:24,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:24,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:24,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:10:24,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:24,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:24,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:24,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:24,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:25,127 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 33 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:25,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331522731] [2020-10-27 01:10:25,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:25,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:10:25,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534910208] [2020-10-27 01:10:25,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:10:25,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:25,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:10:25,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:10:25,135 INFO L87 Difference]: Start difference. First operand 110 states and 138 transitions. Second operand 18 states. [2020-10-27 01:10:25,787 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2020-10-27 01:10:26,073 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2020-10-27 01:10:26,393 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 97 [2020-10-27 01:10:26,901 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 175 [2020-10-27 01:10:27,446 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 178 [2020-10-27 01:10:28,026 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 177 [2020-10-27 01:10:28,569 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 179 [2020-10-27 01:10:29,056 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 162 [2020-10-27 01:10:29,526 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 165 [2020-10-27 01:10:29,974 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 164 [2020-10-27 01:10:30,446 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 166 [2020-10-27 01:10:30,841 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 149 [2020-10-27 01:10:31,260 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 152 [2020-10-27 01:10:31,651 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 151 [2020-10-27 01:10:32,092 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 153 [2020-10-27 01:10:32,463 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 136 [2020-10-27 01:10:32,856 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 139 [2020-10-27 01:10:33,213 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 138 [2020-10-27 01:10:33,583 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 140 [2020-10-27 01:10:33,937 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 123 [2020-10-27 01:10:34,313 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 126 [2020-10-27 01:10:34,672 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 125 [2020-10-27 01:10:35,029 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 127 [2020-10-27 01:10:35,390 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 110 [2020-10-27 01:10:35,724 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 113 [2020-10-27 01:10:36,044 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 112 [2020-10-27 01:10:36,349 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 114 [2020-10-27 01:10:36,689 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 99 [2020-10-27 01:10:37,017 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 101 [2020-10-27 01:10:37,360 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 99 [2020-10-27 01:10:37,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:37,373 INFO L93 Difference]: Finished difference Result 148 states and 184 transitions. [2020-10-27 01:10:37,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:10:37,374 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 88 [2020-10-27 01:10:37,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:37,376 INFO L225 Difference]: With dead ends: 148 [2020-10-27 01:10:37,376 INFO L226 Difference]: Without dead ends: 131 [2020-10-27 01:10:37,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=763, Invalid=1687, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 01:10:37,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-27 01:10:37,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 118. [2020-10-27 01:10:37,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 01:10:37,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 147 transitions. [2020-10-27 01:10:37,392 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 147 transitions. Word has length 88 [2020-10-27 01:10:37,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:37,392 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 147 transitions. [2020-10-27 01:10:37,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:10:37,392 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 147 transitions. [2020-10-27 01:10:37,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 01:10:37,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:37,393 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:37,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:10:37,394 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:37,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:37,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1321447137, now seen corresponding path program 3 times [2020-10-27 01:10:37,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:37,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337621963] [2020-10-27 01:10:37,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:37,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:38,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:38,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 01:10:38,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:38,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1200 [2020-10-27 01:10:38,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:38,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:10:38,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:10:38,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 01:10:38,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:39,062 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-27 01:10:39,492 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 102 [2020-10-27 01:10:39,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:39,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:39,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:40,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:40,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:40,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:40,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:10:40,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:40,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:40,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:40,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:40,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:40,092 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 28 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:40,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337621963] [2020-10-27 01:10:40,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:40,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:10:40,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885997632] [2020-10-27 01:10:40,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:10:40,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:40,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:10:40,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:10:40,094 INFO L87 Difference]: Start difference. First operand 118 states and 147 transitions. Second operand 18 states. [2020-10-27 01:10:40,783 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2020-10-27 01:10:41,125 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 99 [2020-10-27 01:10:41,566 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 113 [2020-10-27 01:10:42,066 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 195 [2020-10-27 01:10:42,687 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 200 [2020-10-27 01:10:43,150 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 199 [2020-10-27 01:10:43,636 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 181 [2020-10-27 01:10:44,087 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 186 [2020-10-27 01:10:44,537 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 185 [2020-10-27 01:10:45,010 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 167 [2020-10-27 01:10:45,450 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 172 [2020-10-27 01:10:45,869 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 171 [2020-10-27 01:10:46,288 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 153 [2020-10-27 01:10:46,695 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 158 [2020-10-27 01:10:47,078 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 157 [2020-10-27 01:10:47,475 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 139 [2020-10-27 01:10:47,873 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 144 [2020-10-27 01:10:48,257 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 143 [2020-10-27 01:10:48,647 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 125 [2020-10-27 01:10:49,036 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 130 [2020-10-27 01:10:49,397 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 129 [2020-10-27 01:10:49,810 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 115 [2020-10-27 01:10:50,184 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 117 [2020-10-27 01:10:50,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:50,261 INFO L93 Difference]: Finished difference Result 131 states and 161 transitions. [2020-10-27 01:10:50,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:10:50,261 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 90 [2020-10-27 01:10:50,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:50,263 INFO L225 Difference]: With dead ends: 131 [2020-10-27 01:10:50,263 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 01:10:50,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=558, Invalid=1248, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:10:50,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 01:10:50,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2020-10-27 01:10:50,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 01:10:50,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 151 transitions. [2020-10-27 01:10:50,280 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 151 transitions. Word has length 90 [2020-10-27 01:10:50,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:50,280 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 151 transitions. [2020-10-27 01:10:50,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:10:50,281 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 151 transitions. [2020-10-27 01:10:50,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 01:10:50,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:50,282 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:50,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:10:50,282 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:50,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:50,283 INFO L82 PathProgramCache]: Analyzing trace with hash -651569147, now seen corresponding path program 5 times [2020-10-27 01:10:50,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:50,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94844980] [2020-10-27 01:10:50,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:50,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:50,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:51,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:51,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 01:10:51,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:51,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 947 [2020-10-27 01:10:51,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:51,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:10:51,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:51,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 01:10:51,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:51,925 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2020-10-27 01:10:52,297 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 64 [2020-10-27 01:10:52,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:52,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:52,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:52,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:52,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:52,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:10:52,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:52,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:52,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:52,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:52,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 24 proven. 219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:52,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94844980] [2020-10-27 01:10:52,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:52,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:10:52,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442576341] [2020-10-27 01:10:52,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:10:52,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:52,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:10:52,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:10:52,896 INFO L87 Difference]: Start difference. First operand 121 states and 151 transitions. Second operand 17 states. [2020-10-27 01:10:54,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:54,492 INFO L93 Difference]: Finished difference Result 211 states and 259 transitions. [2020-10-27 01:10:54,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:10:54,492 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 96 [2020-10-27 01:10:54,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:54,494 INFO L225 Difference]: With dead ends: 211 [2020-10-27 01:10:54,494 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 01:10:54,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:10:54,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 01:10:54,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-10-27 01:10:54,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-27 01:10:54,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 158 transitions. [2020-10-27 01:10:54,512 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 158 transitions. Word has length 96 [2020-10-27 01:10:54,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:54,513 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 158 transitions. [2020-10-27 01:10:54,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:10:54,513 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 158 transitions. [2020-10-27 01:10:54,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 01:10:54,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:54,514 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:54,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:10:54,514 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:54,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:54,515 INFO L82 PathProgramCache]: Analyzing trace with hash -519670988, now seen corresponding path program 6 times [2020-10-27 01:10:54,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:54,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735085855] [2020-10-27 01:10:54,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:54,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:56,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:57,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:57,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 01:10:57,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:10:57,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2822 [2020-10-27 01:10:57,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:57,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:10:57,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:10:57,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 01:10:57,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:58,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:58,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:58,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:58,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:58,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:58,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:10:58,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:58,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:58,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:58,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:58,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:58,417 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 33 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:58,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735085855] [2020-10-27 01:10:58,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:58,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:10:58,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777340018] [2020-10-27 01:10:58,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:10:58,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:58,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:10:58,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:10:58,419 INFO L87 Difference]: Start difference. First operand 126 states and 158 transitions. Second operand 20 states. [2020-10-27 01:10:59,516 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 01:10:59,772 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-27 01:11:00,061 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-10-27 01:11:00,354 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2020-10-27 01:11:00,734 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-27 01:11:01,026 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 01:11:01,302 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-27 01:11:01,590 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 01:11:01,866 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-27 01:11:02,138 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-27 01:11:02,407 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-27 01:11:02,663 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-27 01:11:02,918 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 01:11:03,190 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-27 01:11:03,427 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 01:11:03,660 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 01:11:03,895 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 01:11:04,128 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 01:11:04,352 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 01:11:04,573 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 01:11:04,794 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 01:11:05,021 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 01:11:05,251 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-27 01:11:05,463 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 01:11:05,677 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 01:11:05,892 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 01:11:06,095 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 01:11:06,310 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 01:11:06,525 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 01:11:06,739 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 01:11:07,014 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 01:11:07,234 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 01:11:07,427 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 01:11:07,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:11:07,442 INFO L93 Difference]: Finished difference Result 164 states and 204 transitions. [2020-10-27 01:11:07,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 01:11:07,443 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2020-10-27 01:11:07,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:11:07,444 INFO L225 Difference]: With dead ends: 164 [2020-10-27 01:11:07,444 INFO L226 Difference]: Without dead ends: 147 [2020-10-27 01:11:07,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=999, Invalid=2193, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 01:11:07,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-27 01:11:07,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 134. [2020-10-27 01:11:07,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-27 01:11:07,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 167 transitions. [2020-10-27 01:11:07,462 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 167 transitions. Word has length 101 [2020-10-27 01:11:07,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:11:07,463 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 167 transitions. [2020-10-27 01:11:07,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:11:07,463 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 167 transitions. [2020-10-27 01:11:07,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 01:11:07,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:11:07,464 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:11:07,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:11:07,464 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:11:07,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:11:07,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1022884956, now seen corresponding path program 4 times [2020-10-27 01:11:07,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:11:07,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708810064] [2020-10-27 01:11:07,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:11:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:07,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:09,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:09,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 01:11:09,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:09,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1544 [2020-10-27 01:11:09,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:09,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:11:09,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:11:09,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 01:11:09,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:09,565 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-10-27 01:11:10,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:11:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:10,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:10,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:10,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:11:10,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:10,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:11:10,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:10,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:11:10,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:11:10,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:11:10,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 33 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:11:10,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708810064] [2020-10-27 01:11:10,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:11:10,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:11:10,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729538253] [2020-10-27 01:11:10,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:11:10,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:11:10,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:11:10,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:11:10,277 INFO L87 Difference]: Start difference. First operand 134 states and 167 transitions. Second operand 20 states. [2020-10-27 01:11:11,024 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-10-27 01:11:11,348 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 94 [2020-10-27 01:11:11,724 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 111 [2020-10-27 01:11:12,161 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 128 [2020-10-27 01:11:12,756 WARN L193 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 224 [2020-10-27 01:11:13,480 WARN L193 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 229 [2020-10-27 01:11:14,074 WARN L193 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 228 [2020-10-27 01:11:14,629 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 210 [2020-10-27 01:11:15,192 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 215 [2020-10-27 01:11:15,725 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 214 [2020-10-27 01:11:16,277 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 196 [2020-10-27 01:11:16,807 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 201 [2020-10-27 01:11:17,326 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 200 [2020-10-27 01:11:17,870 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 182 [2020-10-27 01:11:18,385 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 187 [2020-10-27 01:11:18,863 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 186 [2020-10-27 01:11:19,335 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 168 [2020-10-27 01:11:19,842 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 173 [2020-10-27 01:11:20,303 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 172 [2020-10-27 01:11:20,756 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 154 [2020-10-27 01:11:21,218 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 159 [2020-10-27 01:11:21,676 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 158 [2020-10-27 01:11:22,155 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 140 [2020-10-27 01:11:22,608 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 145 [2020-10-27 01:11:23,030 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 144 [2020-10-27 01:11:23,482 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 130 [2020-10-27 01:11:23,879 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 132 [2020-10-27 01:11:23,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:11:23,959 INFO L93 Difference]: Finished difference Result 147 states and 181 transitions. [2020-10-27 01:11:23,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 01:11:23,961 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2020-10-27 01:11:23,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:11:23,963 INFO L225 Difference]: With dead ends: 147 [2020-10-27 01:11:23,963 INFO L226 Difference]: Without dead ends: 143 [2020-10-27 01:11:23,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=729, Invalid=1623, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:11:23,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-27 01:11:23,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2020-10-27 01:11:23,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-27 01:11:23,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 171 transitions. [2020-10-27 01:11:23,980 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 171 transitions. Word has length 103 [2020-10-27 01:11:23,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:11:23,980 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 171 transitions. [2020-10-27 01:11:23,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:11:23,980 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 171 transitions. [2020-10-27 01:11:23,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 01:11:23,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:11:23,981 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:11:23,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:11:23,982 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:11:23,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:11:23,982 INFO L82 PathProgramCache]: Analyzing trace with hash -87106240, now seen corresponding path program 7 times [2020-10-27 01:11:23,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:11:23,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939893529] [2020-10-27 01:11:23,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:11:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:24,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:25,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:25,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 01:11:25,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:25,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1243 [2020-10-27 01:11:25,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:25,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:11:25,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:11:25,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 01:11:25,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:26,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:11:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:26,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:26,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:26,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:11:26,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:26,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:11:26,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:26,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:11:26,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:11:26,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:11:26,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:26,517 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 28 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:11:26,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939893529] [2020-10-27 01:11:26,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:11:26,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:11:26,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994022777] [2020-10-27 01:11:26,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:11:26,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:11:26,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:11:26,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:11:26,519 INFO L87 Difference]: Start difference. First operand 137 states and 171 transitions. Second operand 19 states. [2020-10-27 01:11:28,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:11:28,632 INFO L93 Difference]: Finished difference Result 238 states and 292 transitions. [2020-10-27 01:11:28,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:11:28,634 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 109 [2020-10-27 01:11:28,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:11:28,635 INFO L225 Difference]: With dead ends: 238 [2020-10-27 01:11:28,635 INFO L226 Difference]: Without dead ends: 142 [2020-10-27 01:11:28,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=71, Invalid=685, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:11:28,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-27 01:11:28,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-10-27 01:11:28,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-27 01:11:28,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 178 transitions. [2020-10-27 01:11:28,657 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 178 transitions. Word has length 109 [2020-10-27 01:11:28,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:11:28,657 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 178 transitions. [2020-10-27 01:11:28,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:11:28,657 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 178 transitions. [2020-10-27 01:11:28,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-27 01:11:28,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:11:28,659 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:11:28,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:11:28,659 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:11:28,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:11:28,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1497245297, now seen corresponding path program 8 times [2020-10-27 01:11:28,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:11:28,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312727066] [2020-10-27 01:11:28,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:11:28,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:28,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:30,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:32,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:32,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-27 01:11:32,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:11:32,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3569 [2020-10-27 01:11:32,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:32,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:11:32,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:11:32,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-27 01:11:32,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:33,425 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 53 [2020-10-27 01:11:33,843 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 70 [2020-10-27 01:11:34,295 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 105 [2020-10-27 01:11:34,805 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 89 [2020-10-27 01:11:35,045 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 47 [2020-10-27 01:11:35,226 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 47 [2020-10-27 01:11:35,429 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 43 [2020-10-27 01:11:36,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:11:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:36,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:36,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:36,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:11:36,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:36,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:11:36,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:36,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:11:36,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:11:36,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:11:36,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:36,331 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 38 proven. 329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:11:36,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312727066] [2020-10-27 01:11:36,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:11:36,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:11:36,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223888752] [2020-10-27 01:11:36,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:11:36,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:11:36,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:11:36,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:11:36,332 INFO L87 Difference]: Start difference. First operand 142 states and 178 transitions. Second operand 22 states. [2020-10-27 01:11:37,254 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 77 [2020-10-27 01:11:37,656 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 103 [2020-10-27 01:11:38,271 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 143 [2020-10-27 01:11:38,994 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 160 [2020-10-27 01:11:39,747 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 174 [2020-10-27 01:11:40,683 WARN L193 SmtUtils]: Spent 818.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 284 [2020-10-27 01:11:41,670 WARN L193 SmtUtils]: Spent 879.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 287 [2020-10-27 01:11:42,722 WARN L193 SmtUtils]: Spent 805.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 286 [2020-10-27 01:11:43,731 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 288 [2020-10-27 01:11:44,643 WARN L193 SmtUtils]: Spent 772.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 270 [2020-10-27 01:11:45,561 WARN L193 SmtUtils]: Spent 811.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 273 [2020-10-27 01:11:46,486 WARN L193 SmtUtils]: Spent 790.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 272 [2020-10-27 01:11:47,402 WARN L193 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 274 [2020-10-27 01:11:48,239 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 256 [2020-10-27 01:11:49,147 WARN L193 SmtUtils]: Spent 787.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 259 [2020-10-27 01:11:50,013 WARN L193 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 258 [2020-10-27 01:11:50,881 WARN L193 SmtUtils]: Spent 746.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 260 [2020-10-27 01:11:51,714 WARN L193 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 242 [2020-10-27 01:11:52,611 WARN L193 SmtUtils]: Spent 770.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 245 [2020-10-27 01:11:53,525 WARN L193 SmtUtils]: Spent 758.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 244 [2020-10-27 01:11:54,407 WARN L193 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 246 [2020-10-27 01:11:55,269 WARN L193 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 228 [2020-10-27 01:11:56,077 WARN L193 SmtUtils]: Spent 676.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 231 [2020-10-27 01:11:56,867 WARN L193 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 230 [2020-10-27 01:11:57,688 WARN L193 SmtUtils]: Spent 676.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 232 [2020-10-27 01:11:58,451 WARN L193 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 214 [2020-10-27 01:11:59,248 WARN L193 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 217 [2020-10-27 01:12:00,026 WARN L193 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 216 [2020-10-27 01:12:00,827 WARN L193 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 218 [2020-10-27 01:12:01,592 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 200 [2020-10-27 01:12:02,376 WARN L193 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 203 [2020-10-27 01:12:03,158 WARN L193 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 202 [2020-10-27 01:12:03,938 WARN L193 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 204 [2020-10-27 01:12:04,662 WARN L193 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 186 [2020-10-27 01:12:05,432 WARN L193 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 189 [2020-10-27 01:12:06,193 WARN L193 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 188 [2020-10-27 01:12:06,970 WARN L193 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 190 [2020-10-27 01:12:07,776 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 176 [2020-10-27 01:12:08,534 WARN L193 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 178 [2020-10-27 01:12:09,260 WARN L193 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 176 [2020-10-27 01:12:09,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:12:09,278 INFO L93 Difference]: Finished difference Result 180 states and 224 transitions. [2020-10-27 01:12:09,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 01:12:09,280 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 114 [2020-10-27 01:12:09,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:12:09,281 INFO L225 Difference]: With dead ends: 180 [2020-10-27 01:12:09,281 INFO L226 Difference]: Without dead ends: 163 [2020-10-27 01:12:09,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 33.9s TimeCoverageRelationStatistics Valid=1267, Invalid=2765, Unknown=0, NotChecked=0, Total=4032 [2020-10-27 01:12:09,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-27 01:12:09,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 150. [2020-10-27 01:12:09,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-27 01:12:09,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 187 transitions. [2020-10-27 01:12:09,304 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 187 transitions. Word has length 114 [2020-10-27 01:12:09,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:12:09,304 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 187 transitions. [2020-10-27 01:12:09,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:12:09,304 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 187 transitions. [2020-10-27 01:12:09,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-27 01:12:09,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:12:09,305 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:12:09,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:12:09,306 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:12:09,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:12:09,306 INFO L82 PathProgramCache]: Analyzing trace with hash -2045782951, now seen corresponding path program 5 times [2020-10-27 01:12:09,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:12:09,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820022233] [2020-10-27 01:12:09,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:12:09,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:09,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:11,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:11,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 01:12:11,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:11,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2576 [2020-10-27 01:12:11,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:11,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:12:11,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:12:11,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-27 01:12:11,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:12,633 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-10-27 01:12:12,835 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 69 [2020-10-27 01:12:13,089 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 69 [2020-10-27 01:12:13,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:12:13,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:13,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:13,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:13,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:12:13,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:13,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:12:13,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:13,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:12:13,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:13,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:12:13,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:14,042 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 38 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:12:14,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820022233] [2020-10-27 01:12:14,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:12:14,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:12:14,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343504740] [2020-10-27 01:12:14,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:12:14,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:12:14,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:12:14,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:12:14,044 INFO L87 Difference]: Start difference. First operand 150 states and 187 transitions. Second operand 22 states. [2020-10-27 01:12:14,946 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2020-10-27 01:12:15,366 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 89 [2020-10-27 01:12:15,791 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 106 [2020-10-27 01:12:16,312 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 125 [2020-10-27 01:12:16,948 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 139 [2020-10-27 01:12:17,731 WARN L193 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 249 [2020-10-27 01:12:18,726 WARN L193 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 254 [2020-10-27 01:12:19,522 WARN L193 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 253 [2020-10-27 01:12:20,300 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 235 [2020-10-27 01:12:21,072 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 240 [2020-10-27 01:12:21,826 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 239 [2020-10-27 01:12:22,582 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 221 [2020-10-27 01:12:23,345 WARN L193 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 226 [2020-10-27 01:12:24,041 WARN L193 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 225 [2020-10-27 01:12:24,741 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 207 [2020-10-27 01:12:25,426 WARN L193 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 212 [2020-10-27 01:12:26,088 WARN L193 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 211 [2020-10-27 01:12:26,768 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 193 [2020-10-27 01:12:27,432 WARN L193 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 198 [2020-10-27 01:12:28,078 WARN L193 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 197 [2020-10-27 01:12:28,726 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 179 [2020-10-27 01:12:29,383 WARN L193 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 184 [2020-10-27 01:12:29,996 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 183 [2020-10-27 01:12:30,610 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 165 [2020-10-27 01:12:31,234 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 170 [2020-10-27 01:12:31,864 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 169 [2020-10-27 01:12:32,470 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 151 [2020-10-27 01:12:33,053 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 156 [2020-10-27 01:12:33,633 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 155 [2020-10-27 01:12:34,236 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 141 [2020-10-27 01:12:34,772 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 143 [2020-10-27 01:12:34,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:12:34,875 INFO L93 Difference]: Finished difference Result 163 states and 201 transitions. [2020-10-27 01:12:34,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 01:12:34,878 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 116 [2020-10-27 01:12:34,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:12:34,880 INFO L225 Difference]: With dead ends: 163 [2020-10-27 01:12:34,880 INFO L226 Difference]: Without dead ends: 159 [2020-10-27 01:12:34,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=923, Invalid=2047, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 01:12:34,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-27 01:12:34,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 153. [2020-10-27 01:12:34,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-27 01:12:34,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 191 transitions. [2020-10-27 01:12:34,902 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 191 transitions. Word has length 116 [2020-10-27 01:12:34,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:12:34,902 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 191 transitions. [2020-10-27 01:12:34,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:12:34,902 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 191 transitions. [2020-10-27 01:12:34,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-27 01:12:34,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:12:34,904 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:12:34,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:12:34,904 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:12:34,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:12:34,905 INFO L82 PathProgramCache]: Analyzing trace with hash 2045903741, now seen corresponding path program 9 times [2020-10-27 01:12:34,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:12:34,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631551808] [2020-10-27 01:12:34,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:12:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:35,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:36,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:36,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 01:12:36,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:36,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1929 [2020-10-27 01:12:36,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:36,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:12:36,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:12:36,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 01:12:36,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:38,215 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-27 01:12:38,528 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2020-10-27 01:12:39,197 WARN L193 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 81 [2020-10-27 01:12:40,388 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 238 DAG size of output: 104 [2020-10-27 01:12:40,721 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 40 [2020-10-27 01:12:41,072 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 40 [2020-10-27 01:12:41,387 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 36 [2020-10-27 01:12:41,596 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 32 [2020-10-27 01:12:42,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:12:42,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:42,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:42,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:42,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:12:42,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:42,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:12:42,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:42,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:12:42,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:42,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:12:42,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 32 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:12:42,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631551808] [2020-10-27 01:12:42,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:12:42,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:12:42,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316637958] [2020-10-27 01:12:42,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:12:42,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:12:42,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:12:42,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:12:42,371 INFO L87 Difference]: Start difference. First operand 153 states and 191 transitions. Second operand 21 states. [2020-10-27 01:12:45,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:12:45,823 INFO L93 Difference]: Finished difference Result 265 states and 325 transitions. [2020-10-27 01:12:45,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:12:45,824 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 122 [2020-10-27 01:12:45,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:12:45,826 INFO L225 Difference]: With dead ends: 265 [2020-10-27 01:12:45,826 INFO L226 Difference]: Without dead ends: 158 [2020-10-27 01:12:45,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:12:45,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-27 01:12:45,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2020-10-27 01:12:45,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-27 01:12:45,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 198 transitions. [2020-10-27 01:12:45,850 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 198 transitions. Word has length 122 [2020-10-27 01:12:45,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:12:45,850 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 198 transitions. [2020-10-27 01:12:45,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:12:45,850 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 198 transitions. [2020-10-27 01:12:45,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-27 01:12:45,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:12:45,852 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:12:45,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:12:45,852 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:12:45,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:12:45,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1043009044, now seen corresponding path program 10 times [2020-10-27 01:12:45,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:12:45,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708522759] [2020-10-27 01:12:45,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:12:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:46,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking...