/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/list-simple/dll2n_prepend_equal.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:47:59,990 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:47:59,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:48:00,029 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:48:00,030 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:48:00,031 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:48:00,033 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:48:00,035 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:48:00,037 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:48:00,038 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:48:00,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:48:00,041 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:48:00,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:48:00,043 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:48:00,044 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:48:00,045 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:48:00,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:48:00,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:48:00,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:48:00,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:48:00,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:48:00,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:48:00,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:48:00,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:48:00,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:48:00,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:48:00,062 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:48:00,063 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:48:00,063 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:48:00,065 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:48:00,065 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:48:00,066 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:48:00,067 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:48:00,068 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:48:00,069 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:48:00,069 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:48:00,070 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:48:00,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:48:00,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:48:00,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:48:00,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:48:00,074 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 [2020-10-28 14:48:00,117 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:48:00,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:48:00,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:48:00,122 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:48:00,122 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:48:00,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:48:00,123 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:48:00,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:48:00,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:48:00,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:48:00,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:48:00,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:48:00,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:48:00,125 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:48:00,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:48:00,125 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:48:00,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:48:00,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:48:00,127 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:48:00,127 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:48:00,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:48:00,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:48:00,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:48:00,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:48:00,129 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:48:00,130 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:48:00,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:48:00,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:48:00,130 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:48:00,131 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:48:00,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:48:00,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:48:00,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:48:00,614 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:48:00,619 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:48:00,621 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2n_prepend_equal.i [2020-10-28 14:48:00,703 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d86e11390/632fe0ff370c412ea0ab5a1cef9f16bd/FLAG49b3583a1 [2020-10-28 14:48:01,381 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:48:01,382 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-simple/dll2n_prepend_equal.i [2020-10-28 14:48:01,397 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d86e11390/632fe0ff370c412ea0ab5a1cef9f16bd/FLAG49b3583a1 [2020-10-28 14:48:01,658 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d86e11390/632fe0ff370c412ea0ab5a1cef9f16bd [2020-10-28 14:48:01,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:48:01,668 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:48:01,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:48:01,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:48:01,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:48:01,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:48:01" (1/1) ... [2020-10-28 14:48:01,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b6bf09f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:48:01, skipping insertion in model container [2020-10-28 14:48:01,683 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:48:01" (1/1) ... [2020-10-28 14:48:01,692 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:48:01,729 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:48:02,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:48:02,091 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:48:02,133 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:48:02,205 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:48:02,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:48:02 WrapperNode [2020-10-28 14:48:02,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:48:02,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:48:02,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:48:02,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:48:02,219 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:48:02" (1/1) ... [2020-10-28 14:48:02,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:48:02" (1/1) ... [2020-10-28 14:48:02,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:48:02" (1/1) ... [2020-10-28 14:48:02,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:48:02" (1/1) ... [2020-10-28 14:48:02,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:48:02" (1/1) ... [2020-10-28 14:48:02,296 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:48:02" (1/1) ... [2020-10-28 14:48:02,300 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:48:02" (1/1) ... [2020-10-28 14:48:02,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:48:02,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:48:02,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:48:02,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:48:02,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:48:02" (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 [2020-10-28 14:48:02,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:48:02,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:48:02,392 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:48:02,392 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-28 14:48:02,392 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-28 14:48:02,392 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-28 14:48:02,392 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2020-10-28 14:48:02,392 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-10-28 14:48:02,393 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy [2020-10-28 14:48:02,393 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_prepend [2020-10-28 14:48:02,393 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:48:02,393 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:48:02,393 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:48:02,394 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:48:02,394 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:48:02,394 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:48:02,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:48:02,394 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-28 14:48:02,394 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-28 14:48:02,395 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-28 14:48:02,395 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-28 14:48:02,395 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-28 14:48:02,395 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-28 14:48:02,395 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-28 14:48:02,395 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-28 14:48:02,396 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-28 14:48:02,396 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-28 14:48:02,396 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-28 14:48:02,396 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-28 14:48:02,396 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-28 14:48:02,396 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-28 14:48:02,396 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-28 14:48:02,397 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-28 14:48:02,397 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-28 14:48:02,397 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-28 14:48:02,397 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-28 14:48:02,397 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-28 14:48:02,397 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-28 14:48:02,398 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-28 14:48:02,398 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-28 14:48:02,398 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-28 14:48:02,398 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-28 14:48:02,398 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-28 14:48:02,398 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-28 14:48:02,398 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-28 14:48:02,399 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-28 14:48:02,399 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-28 14:48:02,399 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-28 14:48:02,399 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-28 14:48:02,399 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-28 14:48:02,399 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-28 14:48:02,400 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-28 14:48:02,400 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-28 14:48:02,400 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-28 14:48:02,400 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-28 14:48:02,400 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-28 14:48:02,400 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-28 14:48:02,401 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-28 14:48:02,401 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-28 14:48:02,401 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-28 14:48:02,401 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-28 14:48:02,401 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-28 14:48:02,401 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-28 14:48:02,402 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-28 14:48:02,402 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-28 14:48:02,402 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-28 14:48:02,402 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-28 14:48:02,402 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-28 14:48:02,402 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-28 14:48:02,402 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 14:48:02,403 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 14:48:02,403 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-28 14:48:02,403 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 14:48:02,403 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-28 14:48:02,403 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-28 14:48:02,403 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-28 14:48:02,404 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-28 14:48:02,404 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-28 14:48:02,404 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-28 14:48:02,404 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-28 14:48:02,404 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-28 14:48:02,404 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:48:02,405 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-28 14:48:02,405 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-28 14:48:02,405 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-28 14:48:02,405 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-28 14:48:02,405 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-28 14:48:02,405 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-28 14:48:02,406 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-28 14:48:02,406 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-28 14:48:02,406 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-28 14:48:02,406 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-28 14:48:02,406 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-28 14:48:02,406 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-28 14:48:02,406 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-28 14:48:02,407 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-28 14:48:02,407 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-28 14:48:02,407 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-28 14:48:02,407 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-28 14:48:02,407 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-28 14:48:02,407 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-28 14:48:02,407 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-28 14:48:02,408 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-28 14:48:02,408 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-28 14:48:02,408 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-28 14:48:02,408 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-28 14:48:02,408 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-28 14:48:02,408 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-28 14:48:02,408 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-28 14:48:02,409 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-28 14:48:02,409 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-28 14:48:02,409 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-28 14:48:02,409 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-28 14:48:02,409 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-28 14:48:02,409 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-28 14:48:02,409 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-28 14:48:02,410 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-28 14:48:02,410 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-28 14:48:02,410 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-28 14:48:02,410 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-28 14:48:02,410 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-28 14:48:02,410 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-28 14:48:02,410 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2020-10-28 14:48:02,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 14:48:02,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:48:02,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:48:02,411 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-10-28 14:48:02,411 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy [2020-10-28 14:48:02,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:48:02,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:48:02,412 INFO L130 BoogieDeclarations]: Found specification of procedure dll_prepend [2020-10-28 14:48:02,412 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:48:02,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-10-28 14:48:02,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:48:02,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:48:02,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:48:02,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:48:02,900 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-28 14:48:03,043 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:48:03,043 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-28 14:48:03,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:48:03 BoogieIcfgContainer [2020-10-28 14:48:03,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:48:03,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:48:03,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:48:03,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:48:03,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:48:01" (1/3) ... [2020-10-28 14:48:03,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@966df92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:48:03, skipping insertion in model container [2020-10-28 14:48:03,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:48:02" (2/3) ... [2020-10-28 14:48:03,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@966df92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:48:03, skipping insertion in model container [2020-10-28 14:48:03,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:48:03" (3/3) ... [2020-10-28 14:48:03,054 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_prepend_equal.i [2020-10-28 14:48:03,065 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:48:03,070 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:48:03,083 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:48:03,110 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:48:03,110 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:48:03,110 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:48:03,111 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:48:03,111 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:48:03,111 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:48:03,111 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:48:03,111 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:48:03,133 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-10-28 14:48:03,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:48:03,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:48:03,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:48:03,145 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:48:03,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:48:03,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1234755749, now seen corresponding path program 1 times [2020-10-28 14:48:03,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:48:03,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205472968] [2020-10-28 14:48:03,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:48:03,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:03,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:03,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:04,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:05,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:05,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:48:05,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:48:05,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2222 [2020-10-28 14:48:05,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:05,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:05,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:48:05,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:48:05,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:48:05,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:48:05,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:48:05,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:05,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:05,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:05,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:48:05,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:05,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:48:05,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:05,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:05,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:48:05,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:48:05,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:48:05,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:05,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:48:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:05,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:05,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:05,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:48:05,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:05,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 14:48:05,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:05,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:05,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:48:05,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:48:05,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:48:05,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:48:05,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-28 14:48:05,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:05,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:05,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:05,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:48:05,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:05,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 14:48:05,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:05,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:05,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:48:05,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:48:05,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:48:05,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:05,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-28 14:48:05,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:05,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:05,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:05,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:48:05,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:05,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:48:05,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:05,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:05,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:48:05,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:48:05,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:48:05,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:05,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:48:05,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205472968] [2020-10-28 14:48:05,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:48:06,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 14:48:06,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108010315] [2020-10-28 14:48:06,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:48:06,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:48:06,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:48:06,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:48:06,027 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 7 states. [2020-10-28 14:48:06,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:48:06,473 INFO L93 Difference]: Finished difference Result 105 states and 133 transitions. [2020-10-28 14:48:06,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:48:06,475 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-28 14:48:06,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:48:06,483 INFO L225 Difference]: With dead ends: 105 [2020-10-28 14:48:06,484 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 14:48:06,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:48:06,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 14:48:06,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-10-28 14:48:06,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 14:48:06,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-28 14:48:06,547 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 32 [2020-10-28 14:48:06,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:48:06,548 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-28 14:48:06,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:48:06,549 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-28 14:48:06,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:48:06,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:48:06,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:48:06,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:48:06,554 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:48:06,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:48:06,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1106714710, now seen corresponding path program 1 times [2020-10-28 14:48:06,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:48:06,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788278267] [2020-10-28 14:48:06,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:48:06,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:06,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:06,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:06,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:06,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:07,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:08,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:08,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:08,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:11,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:11,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:11,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:48:11,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 14:48:11,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5118 [2020-10-28 14:48:11,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:11,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:11,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:48:11,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:48:11,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:48:11,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:11,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:48:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:11,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:11,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:11,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:48:11,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:11,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:48:11,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:11,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:11,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:48:11,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:48:11,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:48:11,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:11,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:48:11,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:11,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:11,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:11,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-28 14:48:11,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:11,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 14:48:11,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:11,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:11,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:48:11,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:48:11,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:48:11,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:11,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-28 14:48:11,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:11,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:11,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:11,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:48:11,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:11,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 14:48:11,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:11,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:11,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:48:11,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:48:11,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:48:11,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:11,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-28 14:48:11,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:11,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:11,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:11,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:48:11,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:11,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:48:11,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:11,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:11,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:48:11,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:48:11,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:48:11,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:11,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:48:11,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788278267] [2020-10-28 14:48:11,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:48:11,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:48:11,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306000523] [2020-10-28 14:48:11,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:48:11,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:48:11,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:48:11,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:48:11,891 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 5 states. [2020-10-28 14:48:12,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:48:12,099 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2020-10-28 14:48:12,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:48:12,100 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-10-28 14:48:12,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:48:12,101 INFO L225 Difference]: With dead ends: 73 [2020-10-28 14:48:12,101 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 14:48:12,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:48:12,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 14:48:12,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-28 14:48:12,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 14:48:12,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-28 14:48:12,111 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 37 [2020-10-28 14:48:12,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:48:12,112 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-28 14:48:12,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:48:12,112 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-28 14:48:12,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:48:12,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:48:12,113 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:48:12,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:48:12,114 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:48:12,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:48:12,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1168754324, now seen corresponding path program 1 times [2020-10-28 14:48:12,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:48:12,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211799468] [2020-10-28 14:48:12,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:48:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:12,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:12,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:12,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:12,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:12,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:13,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:13,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:17,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:17,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:17,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:48:17,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 14:48:17,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 14:48:17,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:17,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:17,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:48:17,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:48:17,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:48:17,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:48:17,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:48:17,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:17,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:17,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:17,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:48:17,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:17,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:48:17,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:17,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:17,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:48:17,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:48:17,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:48:17,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:17,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:48:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:17,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:17,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:17,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-28 14:48:17,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:17,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 14:48:17,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:17,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:17,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:48:17,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:48:17,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:48:17,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:17,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-28 14:48:17,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:17,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:17,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:17,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:48:17,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:17,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 14:48:17,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:17,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:17,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:48:17,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:48:17,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:48:17,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:17,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-28 14:48:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:17,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:17,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:17,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:48:17,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:17,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:48:17,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:17,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:17,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:48:17,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:48:17,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:48:17,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:17,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:48:17,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211799468] [2020-10-28 14:48:17,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:48:17,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:48:17,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427856880] [2020-10-28 14:48:17,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:48:17,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:48:17,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:48:17,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:48:17,344 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 8 states. [2020-10-28 14:48:17,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:48:17,575 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2020-10-28 14:48:17,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:48:17,576 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-28 14:48:17,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:48:17,577 INFO L225 Difference]: With dead ends: 73 [2020-10-28 14:48:17,577 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 14:48:17,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:48:17,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 14:48:17,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-10-28 14:48:17,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 14:48:17,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-10-28 14:48:17,592 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 37 [2020-10-28 14:48:17,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:48:17,593 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-10-28 14:48:17,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:48:17,593 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-10-28 14:48:17,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:48:17,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:48:17,598 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:48:17,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:48:17,598 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:48:17,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:48:17,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1383884857, now seen corresponding path program 1 times [2020-10-28 14:48:17,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:48:17,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806491745] [2020-10-28 14:48:17,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:48:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:17,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:17,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:17,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:18,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:18,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:18,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:21,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:21,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:22,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:22,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:48:22,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 14:48:22,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 14:48:22,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:22,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:22,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:48:22,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 14:48:22,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:48:22,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:22,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:48:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:22,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:22,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:22,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:48:22,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:22,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:48:22,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:22,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:22,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:48:22,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:48:22,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:48:22,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:22,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:48:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:22,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:22,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:22,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 14:48:22,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:22,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 14:48:22,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:22,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:22,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:48:22,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:48:22,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:48:22,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:22,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 14:48:22,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:22,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:22,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:22,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:22,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:48:22,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:48:22,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-28 14:48:22,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:22,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:22,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:48:22,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:48:22,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:48:22,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:23,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-28 14:48:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:23,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:23,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:23,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:48:23,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:23,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 14:48:23,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:23,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:23,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:48:23,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:48:23,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:48:23,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 14:48:23,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806491745] [2020-10-28 14:48:23,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:48:23,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-28 14:48:23,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907429167] [2020-10-28 14:48:23,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:48:23,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:48:23,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:48:23,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:48:23,153 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 12 states. [2020-10-28 14:48:23,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:48:23,481 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-10-28 14:48:23,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:48:23,481 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-10-28 14:48:23,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:48:23,484 INFO L225 Difference]: With dead ends: 51 [2020-10-28 14:48:23,484 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 14:48:23,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:48:23,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 14:48:23,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-28 14:48:23,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 14:48:23,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-28 14:48:23,493 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 42 [2020-10-28 14:48:23,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:48:23,494 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-28 14:48:23,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:48:23,494 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-28 14:48:23,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:48:23,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:48:23,495 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:48:23,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:48:23,496 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:48:23,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:48:23,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1382276143, now seen corresponding path program 1 times [2020-10-28 14:48:23,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:48:23,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976244592] [2020-10-28 14:48:23,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:48:23,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:23,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:23,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:24,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:28,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:28,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:48:28,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:48:28,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4537 [2020-10-28 14:48:28,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:28,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:28,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:48:28,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:48:28,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 14:48:28,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:48:28,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:48:28,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:28,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:28,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:28,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:48:28,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:28,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:48:28,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:28,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:28,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:48:28,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:48:28,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:48:28,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:28,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:48:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:28,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:28,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:28,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 14:48:28,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:28,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 14:48:28,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:28,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:28,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:48:28,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:48:28,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:48:28,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:28,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 14:48:28,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:28,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:28,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:28,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:48:28,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:28,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-28 14:48:28,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:28,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:28,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:48:28,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:48:28,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:48:28,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:28,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-28 14:48:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:28,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:28,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:28,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:48:28,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:28,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 14:48:28,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:28,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:28,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:48:28,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:48:28,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:48:28,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:28,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 14:48:28,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976244592] [2020-10-28 14:48:28,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:48:28,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-28 14:48:28,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852829224] [2020-10-28 14:48:28,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:48:28,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:48:28,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:48:28,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:48:28,582 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 14 states. [2020-10-28 14:48:29,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:48:29,284 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-10-28 14:48:29,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:48:29,287 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-28 14:48:29,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:48:29,288 INFO L225 Difference]: With dead ends: 59 [2020-10-28 14:48:29,288 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 14:48:29,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:48:29,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 14:48:29,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-10-28 14:48:29,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 14:48:29,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-28 14:48:29,304 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 42 [2020-10-28 14:48:29,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:48:29,304 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-28 14:48:29,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:48:29,305 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-28 14:48:29,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:48:29,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:48:29,305 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:48:29,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:48:29,306 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:48:29,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:48:29,306 INFO L82 PathProgramCache]: Analyzing trace with hash -989249133, now seen corresponding path program 1 times [2020-10-28 14:48:29,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:48:29,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783664448] [2020-10-28 14:48:29,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:48:29,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:29,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:30,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:30,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:48:30,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:30,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 863 [2020-10-28 14:48:30,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:30,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:30,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 14:48:30,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:48:30,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 14:48:30,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:30,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:48:30,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:30,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:30,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:30,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:48:30,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:30,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:48:30,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:30,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:30,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:48:30,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:48:30,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:48:30,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:30,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:48:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:30,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:30,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:30,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 14:48:30,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:30,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-28 14:48:30,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:30,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:30,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:48:30,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:48:30,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:48:30,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:30,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 14:48:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:30,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:30,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:30,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:48:30,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:30,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-28 14:48:30,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:30,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:30,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:48:30,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:48:30,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:48:30,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:31,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-28 14:48:31,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:31,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:31,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:31,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:48:31,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:31,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-28 14:48:31,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:31,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:31,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:48:31,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:48:31,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:48:31,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:48:31,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783664448] [2020-10-28 14:48:31,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:48:31,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-10-28 14:48:31,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482307665] [2020-10-28 14:48:31,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:48:31,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:48:31,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:48:31,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:48:31,259 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 20 states. [2020-10-28 14:48:32,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:48:32,291 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-10-28 14:48:32,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:48:32,292 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 42 [2020-10-28 14:48:32,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:48:32,294 INFO L225 Difference]: With dead ends: 56 [2020-10-28 14:48:32,294 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 14:48:32,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:48:32,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 14:48:32,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-10-28 14:48:32,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 14:48:32,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-28 14:48:32,302 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 42 [2020-10-28 14:48:32,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:48:32,303 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-28 14:48:32,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:48:32,303 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-28 14:48:32,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:48:32,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:48:32,304 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:48:32,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:48:32,305 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:48:32,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:48:32,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1232519358, now seen corresponding path program 1 times [2020-10-28 14:48:32,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:48:32,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54343572] [2020-10-28 14:48:32,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:48:32,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:32,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:32,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:32,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:33,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:33,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:36,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:36,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 14:48:36,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:48:36,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4427 [2020-10-28 14:48:36,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:36,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:36,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:48:36,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:48:36,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 14:48:36,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:36,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:48:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:36,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:36,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:36,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:48:36,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:36,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:48:36,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:36,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:36,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:48:36,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:48:36,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:48:36,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:36,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:48:36,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:36,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:37,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:37,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 14:48:37,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:37,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-28 14:48:37,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:37,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:37,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:48:37,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:48:37,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:48:37,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:37,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 14:48:37,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:37,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:37,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:37,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:37,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:48:37,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:48:37,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-10-28 14:48:37,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:37,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:37,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:48:37,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:48:37,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:48:37,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:37,681 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-10-28 14:48:37,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-28 14:48:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:37,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:37,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:37,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:48:37,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:37,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 14:48:37,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:37,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:37,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:48:37,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:48:37,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:48:37,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:37,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:48:37,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54343572] [2020-10-28 14:48:37,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:48:37,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:48:37,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170662447] [2020-10-28 14:48:37,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:48:37,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:48:37,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:48:37,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:48:37,893 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 20 states. [2020-10-28 14:48:39,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:48:39,115 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2020-10-28 14:48:39,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:48:39,115 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 44 [2020-10-28 14:48:39,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:48:39,117 INFO L225 Difference]: With dead ends: 91 [2020-10-28 14:48:39,117 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 14:48:39,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:48:39,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 14:48:39,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2020-10-28 14:48:39,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 14:48:39,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-10-28 14:48:39,127 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 44 [2020-10-28 14:48:39,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:48:39,127 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-10-28 14:48:39,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:48:39,128 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-10-28 14:48:39,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:48:39,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:48:39,129 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:48:39,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:48:39,129 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:48:39,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:48:39,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1230910644, now seen corresponding path program 1 times [2020-10-28 14:48:39,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:48:39,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251977013] [2020-10-28 14:48:39,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:48:39,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:39,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:39,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:39,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:40,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:40,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:44,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:44,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 14:48:44,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:48:44,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 14:48:44,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:44,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:44,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:48:44,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:48:44,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 14:48:44,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:44,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:48:44,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:44,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:44,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:44,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:48:44,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:44,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:48:44,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:44,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:44,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:48:44,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:48:44,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:48:44,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:44,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:48:44,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:44,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:44,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:44,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 14:48:44,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:44,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 14:48:44,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:44,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:44,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:48:44,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:48:44,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:48:44,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:44,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 14:48:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:44,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:44,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:44,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:48:44,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:44,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-28 14:48:44,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:44,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:44,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:48:44,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:48:44,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:48:44,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:44,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-28 14:48:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:44,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:44,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:44,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:48:44,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:44,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 14:48:44,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:44,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:44,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:48:44,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:48:44,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:48:44,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:44,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 14:48:44,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251977013] [2020-10-28 14:48:44,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:48:44,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:48:44,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830553274] [2020-10-28 14:48:44,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:48:44,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:48:44,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:48:44,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:48:44,754 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 16 states. [2020-10-28 14:48:45,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:48:45,651 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2020-10-28 14:48:45,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:48:45,653 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2020-10-28 14:48:45,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:48:45,654 INFO L225 Difference]: With dead ends: 61 [2020-10-28 14:48:45,654 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 14:48:45,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:48:45,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 14:48:45,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-28 14:48:45,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 14:48:45,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-28 14:48:45,669 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 44 [2020-10-28 14:48:45,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:48:45,670 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-28 14:48:45,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:48:45,670 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-28 14:48:45,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:48:45,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:48:45,671 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:48:45,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:48:45,672 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:48:45,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:48:45,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1490684796, now seen corresponding path program 1 times [2020-10-28 14:48:45,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:48:45,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705994145] [2020-10-28 14:48:45,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:48:45,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:45,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:45,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:47,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:47,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 14:48:47,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:48:47,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2095 [2020-10-28 14:48:47,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:47,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:47,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:48:47,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 14:48:47,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:48:47,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:48,036 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 23 [2020-10-28 14:48:48,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:48:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:48,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:48,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:48,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:48:48,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:48,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:48:48,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:48,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:48,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:48:48,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:48:48,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:48:48,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:48,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:48:48,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:48,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:48,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:48,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 14:48:48,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:48,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 14:48:48,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:48,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:48,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:48:48,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:48:48,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:48:48,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:48,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 14:48:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:48,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:48,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:48,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:48:48,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:48,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-28 14:48:48,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:48,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:48,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:48:48,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:48:48,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:48:48,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:48,738 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 59 [2020-10-28 14:48:49,081 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 34 [2020-10-28 14:48:49,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-28 14:48:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:49,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:49,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:49,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:48:49,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:49,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:48:49,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:49,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:49,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:48:49,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:48:49,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:48:49,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 14:48:49,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705994145] [2020-10-28 14:48:49,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:48:49,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:48:49,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974908999] [2020-10-28 14:48:49,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:48:49,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:48:49,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:48:49,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:48:49,174 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 12 states. [2020-10-28 14:48:49,721 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-28 14:48:49,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:48:49,884 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-10-28 14:48:49,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:48:49,885 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-10-28 14:48:49,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:48:49,886 INFO L225 Difference]: With dead ends: 53 [2020-10-28 14:48:49,887 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 14:48:49,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:48:49,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 14:48:49,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-28 14:48:49,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 14:48:49,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-28 14:48:49,895 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2020-10-28 14:48:49,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:48:49,896 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-28 14:48:49,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:48:49,896 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-28 14:48:49,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:48:49,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:48:49,897 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:48:49,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:48:49,897 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:48:49,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:48:49,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1489076082, now seen corresponding path program 1 times [2020-10-28 14:48:49,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:48:49,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058691330] [2020-10-28 14:48:49,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:48:49,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:49,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:51,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:51,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 14:48:51,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:51,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1323 [2020-10-28 14:48:51,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:51,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:51,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 14:48:51,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:48:51,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 14:48:51,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:51,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:48:51,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:51,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:51,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:51,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:48:51,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:51,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:48:51,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:51,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:51,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:48:51,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:48:51,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:48:51,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:51,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:48:51,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:51,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:51,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:51,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 14:48:51,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:51,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-28 14:48:51,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:51,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:51,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:48:51,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:48:51,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:48:51,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:51,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 14:48:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:51,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:52,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:52,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:48:52,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:52,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-28 14:48:52,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:52,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:52,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:48:52,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:48:52,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:48:52,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:52,591 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-10-28 14:48:52,882 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-10-28 14:48:52,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-28 14:48:53,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:53,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:53,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:53,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:48:53,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:53,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 14:48:53,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:53,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:53,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:48:53,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:48:53,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:48:53,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:53,378 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2020-10-28 14:48:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:48:53,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058691330] [2020-10-28 14:48:53,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:48:53,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 14:48:53,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721039203] [2020-10-28 14:48:53,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 14:48:53,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:48:53,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 14:48:53,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=643, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:48:53,398 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 27 states. [2020-10-28 14:48:55,069 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-28 14:48:55,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:48:55,565 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-10-28 14:48:55,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 14:48:55,566 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 44 [2020-10-28 14:48:55,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:48:55,567 INFO L225 Difference]: With dead ends: 56 [2020-10-28 14:48:55,567 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 14:48:55,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=174, Invalid=1632, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:48:55,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 14:48:55,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-10-28 14:48:55,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 14:48:55,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-28 14:48:55,576 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 44 [2020-10-28 14:48:55,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:48:55,577 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-28 14:48:55,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 14:48:55,577 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-28 14:48:55,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 14:48:55,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:48:55,578 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:48:55,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:48:55,578 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:48:55,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:48:55,579 INFO L82 PathProgramCache]: Analyzing trace with hash -788045633, now seen corresponding path program 2 times [2020-10-28 14:48:55,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:48:55,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510863132] [2020-10-28 14:48:55,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:48:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:55,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:56,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:56,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 14:48:56,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:56,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1065 [2020-10-28 14:48:56,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:56,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:56,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 14:48:56,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:48:56,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 14:48:56,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:56,997 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2020-10-28 14:48:57,272 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-10-28 14:48:57,473 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2020-10-28 14:48:57,617 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 20 [2020-10-28 14:48:57,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:48:57,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:57,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:57,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:57,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:48:57,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:57,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:48:57,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:57,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:57,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:48:57,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:48:57,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:48:57,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:57,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:48:57,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:57,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:57,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:57,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 14:48:57,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:57,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-28 14:48:57,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:57,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:57,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:48:57,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:48:57,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:48:57,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:48:58,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 14:48:58,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:48:58,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:48:58,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:48:58,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:48:58,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:48:58,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-28 14:48:58,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:48:58,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:48:58,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:48:58,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:48:58,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:48:58,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:49:00,718 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 254 DAG size of output: 135 [2020-10-28 14:49:02,479 WARN L193 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 259 DAG size of output: 146 [2020-10-28 14:49:03,039 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 78 [2020-10-28 14:49:03,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-28 14:49:03,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:49:03,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:49:03,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:49:03,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:49:03,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:49:03,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-28 14:49:03,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:49:03,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:49:03,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:49:03,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:49:03,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:49:03,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:49:03,379 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2020-10-28 14:49:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:49:03,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510863132] [2020-10-28 14:49:03,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:49:03,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 14:49:03,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932820585] [2020-10-28 14:49:03,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 14:49:03,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:49:03,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 14:49:03,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=545, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:49:03,405 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 25 states. [2020-10-28 14:49:05,025 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-28 14:49:05,541 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2020-10-28 14:49:05,997 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-28 14:49:06,335 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-10-28 14:49:06,526 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-28 14:49:06,795 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-28 14:49:07,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:49:07,361 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2020-10-28 14:49:07,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 14:49:07,361 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 46 [2020-10-28 14:49:07,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:49:07,362 INFO L225 Difference]: With dead ends: 59 [2020-10-28 14:49:07,363 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 14:49:07,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=180, Invalid=1712, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 14:49:07,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 14:49:07,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-10-28 14:49:07,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 14:49:07,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-28 14:49:07,375 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 46 [2020-10-28 14:49:07,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:49:07,376 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-28 14:49:07,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 14:49:07,376 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-28 14:49:07,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 14:49:07,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:49:07,377 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:49:07,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:49:07,377 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:49:07,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:49:07,378 INFO L82 PathProgramCache]: Analyzing trace with hash -786436919, now seen corresponding path program 2 times [2020-10-28 14:49:07,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:49:07,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912113655] [2020-10-28 14:49:07,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:49:07,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:49:07,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:49:08,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:49:08,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 14:49:08,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:49:08,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1292 [2020-10-28 14:49:08,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:49:08,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:49:08,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 14:49:08,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:49:08,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 14:49:08,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:49:09,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:49:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:49:09,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:49:09,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:49:09,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:49:09,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:49:09,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:49:09,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:49:09,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:49:09,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:49:09,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:49:09,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:49:09,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:49:09,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:49:09,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:49:09,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:49:09,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:49:09,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 14:49:09,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:49:09,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-28 14:49:09,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:49:09,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:49:09,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:49:09,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:49:09,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:49:09,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:49:09,641 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-10-28 14:49:09,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 14:49:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:49:09,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:49:10,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:49:10,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:49:10,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:49:10,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-28 14:49:10,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:49:10,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:49:10,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:49:10,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:49:10,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:49:10,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:49:10,621 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 45 [2020-10-28 14:49:11,109 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 75 [2020-10-28 14:49:11,632 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 80 [2020-10-28 14:49:12,157 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 79 [2020-10-28 14:49:12,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-28 14:49:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:49:12,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:49:12,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:49:12,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:49:12,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:49:12,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 14:49:12,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:49:12,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:49:12,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:49:12,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:49:12,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:49:12,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:49:12,674 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-10-28 14:49:12,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:49:12,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912113655] [2020-10-28 14:49:12,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:49:12,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 14:49:12,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591007031] [2020-10-28 14:49:12,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 14:49:12,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:49:12,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 14:49:12,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=752, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:49:12,710 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 29 states. [2020-10-28 14:49:13,573 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-28 14:49:13,850 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2020-10-28 14:49:14,367 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2020-10-28 14:49:14,702 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-10-28 14:49:16,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:49:16,328 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-10-28 14:49:16,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 14:49:16,328 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 46 [2020-10-28 14:49:16,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:49:16,330 INFO L225 Difference]: With dead ends: 58 [2020-10-28 14:49:16,330 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 14:49:16,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=175, Invalid=1805, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 14:49:16,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 14:49:16,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-28 14:49:16,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 14:49:16,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-28 14:49:16,341 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 46 [2020-10-28 14:49:16,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:49:16,341 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-28 14:49:16,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 14:49:16,342 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-28 14:49:16,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:49:16,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:49:16,342 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:49:16,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:49:16,343 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:49:16,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:49:16,343 INFO L82 PathProgramCache]: Analyzing trace with hash 138324538, now seen corresponding path program 3 times [2020-10-28 14:49:16,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:49:16,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514259316] [2020-10-28 14:49:16,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:49:16,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:49:16,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:49:16,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:49:17,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:49:17,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 14:49:17,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:49:17,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 990 [2020-10-28 14:49:17,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:49:17,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:49:17,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:49:17,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:49:17,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 14:49:17,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:49:17,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:49:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:49:17,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:49:17,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:49:17,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:49:17,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:49:17,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:49:17,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:49:17,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:49:17,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:49:17,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:49:17,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:49:17,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:49:17,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:49:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:49:17,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:49:17,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:49:17,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:49:17,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 14:49:17,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:49:17,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-28 14:49:17,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:49:17,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:49:17,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:49:17,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:49:17,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:49:17,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:49:17,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 14:49:17,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:49:17,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:49:17,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:49:17,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:49:17,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:49:17,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 14:49:17,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:49:17,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:49:17,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:49:17,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:49:17,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:49:17,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:49:17,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-28 14:49:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:49:17,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:49:17,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:49:17,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:49:17,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:49:17,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:49:17,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:49:17,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:49:17,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:49:17,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:49:17,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:49:17,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:49:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 14:49:17,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514259316] [2020-10-28 14:49:17,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:49:17,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:49:17,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544917339] [2020-10-28 14:49:17,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:49:17,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:49:17,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:49:17,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:49:17,624 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 9 states. [2020-10-28 14:49:17,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:49:17,924 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-10-28 14:49:17,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:49:17,924 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-10-28 14:49:17,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:49:17,925 INFO L225 Difference]: With dead ends: 58 [2020-10-28 14:49:17,925 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 14:49:17,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:49:17,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 14:49:17,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2020-10-28 14:49:17,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 14:49:17,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-28 14:49:17,941 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 48 [2020-10-28 14:49:17,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:49:17,941 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-28 14:49:17,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:49:17,941 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-28 14:49:17,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:49:17,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:49:17,945 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:49:17,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:49:17,945 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:49:17,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:49:17,946 INFO L82 PathProgramCache]: Analyzing trace with hash 139933252, now seen corresponding path program 3 times [2020-10-28 14:49:17,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:49:17,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626548595] [2020-10-28 14:49:17,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:49:17,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:49:17,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:49:18,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:49:19,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:49:21,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:49:22,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:49:22,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 14:49:22,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:49:22,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 14:49:22,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:49:22,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:49:22,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 14:49:22,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:49:22,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 14:49:22,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:49:23,261 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2020-10-28 14:49:23,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:49:23,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:49:23,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:49:23,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:49:23,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:49:23,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:49:23,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:49:23,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:49:23,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:49:23,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:49:23,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:49:23,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:49:23,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:49:23,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:49:23,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:49:23,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:49:23,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:49:24,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:49:24,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 14:49:24,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:49:24,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 311 [2020-10-28 14:49:24,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:49:24,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:49:24,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:49:24,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:49:24,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:49:24,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:49:24,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 14:49:24,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:49:24,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:49:25,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:49:25,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:49:25,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:49:25,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-10-28 14:49:25,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:49:25,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:49:25,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:49:25,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:49:25,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:49:25,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:49:26,811 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-28 14:49:28,736 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 181 DAG size of output: 134 [2020-10-28 14:49:40,925 WARN L193 SmtUtils]: Spent 10.83 s on a formula simplification. DAG size of input: 249 DAG size of output: 202 [2020-10-28 14:49:57,025 WARN L193 SmtUtils]: Spent 13.50 s on a formula simplification. DAG size of input: 304 DAG size of output: 251 [2020-10-28 14:49:59,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-28 14:49:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:49:59,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:49:59,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:49:59,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:49:59,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:49:59,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 14:49:59,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:49:59,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:49:59,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:49:59,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:49:59,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:49:59,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:50:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:50:00,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626548595] [2020-10-28 14:50:00,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:50:00,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 14:50:00,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17808176] [2020-10-28 14:50:00,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 14:50:00,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:50:00,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 14:50:00,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=918, Unknown=0, NotChecked=0, Total=992 [2020-10-28 14:50:00,084 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 32 states. [2020-10-28 14:50:02,875 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 50 [2020-10-28 14:50:04,017 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-28 14:50:08,342 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-28 14:50:08,944 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-10-28 14:50:09,265 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-28 14:50:11,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:50:11,798 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-10-28 14:50:11,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 14:50:11,798 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 48 [2020-10-28 14:50:11,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:50:11,799 INFO L225 Difference]: With dead ends: 82 [2020-10-28 14:50:11,799 INFO L226 Difference]: Without dead ends: 78 [2020-10-28 14:50:11,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 39.0s TimeCoverageRelationStatistics Valid=206, Invalid=2550, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 14:50:11,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-28 14:50:11,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2020-10-28 14:50:11,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-28 14:50:11,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-10-28 14:50:11,815 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 48 [2020-10-28 14:50:11,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:50:11,816 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-10-28 14:50:11,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 14:50:11,817 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-10-28 14:50:11,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 14:50:11,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:50:11,823 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:50:11,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:50:11,823 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:50:11,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:50:11,824 INFO L82 PathProgramCache]: Analyzing trace with hash -12273871, now seen corresponding path program 4 times [2020-10-28 14:50:11,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:50:11,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077045590] [2020-10-28 14:50:11,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:50:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:50:11,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:50:12,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:50:15,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:50:15,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 14:50:15,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:50:15,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4135 [2020-10-28 14:50:15,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:50:15,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:50:15,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:50:15,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:50:15,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:50:15,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:50:16,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:50:16,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:50:16,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:50:16,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:50:16,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:50:16,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:50:16,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:50:16,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:50:16,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:50:16,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:50:16,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:50:16,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:50:16,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:50:16,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:50:16,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:50:16,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:50:16,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:50:16,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 14:50:16,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:50:16,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-28 14:50:16,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:50:16,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:50:16,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:50:16,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:50:16,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:50:16,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:50:16,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-28 14:50:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:50:16,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:50:16,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:50:16,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:50:16,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:50:16,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:50:16,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:50:16,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:50:16,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:50:16,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:50:16,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:50:16,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:50:16,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-28 14:50:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:50:16,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:50:16,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:50:16,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:50:16,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:50:16,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:50:16,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:50:16,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:50:16,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:50:16,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:50:16,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:50:16,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:50:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 14:50:16,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077045590] [2020-10-28 14:50:16,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:50:16,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:50:16,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312477401] [2020-10-28 14:50:16,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:50:16,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:50:16,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:50:16,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:50:16,204 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 9 states. [2020-10-28 14:50:16,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:50:16,523 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2020-10-28 14:50:16,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:50:16,524 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-10-28 14:50:16,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:50:16,525 INFO L225 Difference]: With dead ends: 89 [2020-10-28 14:50:16,525 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 14:50:16,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:50:16,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 14:50:16,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-28 14:50:16,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 14:50:16,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-28 14:50:16,539 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 53 [2020-10-28 14:50:16,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:50:16,540 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-28 14:50:16,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:50:16,540 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-28 14:50:16,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 14:50:16,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:50:16,541 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:50:16,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:50:16,542 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:50:16,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:50:16,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1321828597, now seen corresponding path program 4 times [2020-10-28 14:50:16,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:50:16,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928341286] [2020-10-28 14:50:16,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:50:16,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:50:16,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:50:17,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:50:18,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:50:18,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:50:19,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:50:19,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:50:21,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:50:21,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 14:50:21,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:50:21,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5079 [2020-10-28 14:50:21,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:50:21,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:50:21,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 14:50:21,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:50:21,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 14:50:21,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:50:22,355 WARN L193 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2020-10-28 14:50:22,761 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-28 14:50:23,236 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 53 [2020-10-28 14:50:23,781 WARN L193 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 51 [2020-10-28 14:50:24,125 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2020-10-28 14:50:24,493 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2020-10-28 14:50:24,685 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2020-10-28 14:50:24,836 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 24 [2020-10-28 14:50:25,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:50:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:50:25,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:50:25,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:50:25,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:50:25,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:50:25,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:50:25,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:50:25,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:50:25,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:50:25,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:50:25,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:50:25,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:50:25,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:50:25,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:50:25,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:50:25,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:50:25,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:50:25,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 14:50:25,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:50:25,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-28 14:50:25,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:50:25,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:50:25,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:50:25,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:50:25,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:50:25,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:50:25,942 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-28 14:50:26,196 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2020-10-28 14:50:26,454 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2020-10-28 14:50:26,722 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2020-10-28 14:50:26,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 14:50:26,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:50:26,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:50:26,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:50:26,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:50:26,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:50:26,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-28 14:50:26,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:50:26,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:50:26,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:50:26,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:50:26,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:50:26,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:50:34,321 WARN L193 SmtUtils]: Spent 957.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 108 [2020-10-28 14:50:42,709 WARN L193 SmtUtils]: Spent 6.67 s on a formula simplification. DAG size of input: 322 DAG size of output: 168