/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/list-properties/list_flag-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:19:28,910 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:19:28,914 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:19:28,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:19:28,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:19:28,978 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:19:28,981 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:19:28,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:19:28,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:19:29,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:19:29,015 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:19:29,017 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:19:29,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:19:29,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:19:29,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:19:29,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:19:29,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:19:29,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:19:29,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:19:29,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:19:29,030 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:19:29,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:19:29,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:19:29,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:19:29,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:19:29,037 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:19:29,037 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:19:29,038 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:19:29,039 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:19:29,040 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:19:29,040 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:19:29,041 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:19:29,042 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:19:29,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:19:29,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:19:29,045 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:19:29,046 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:19:29,046 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:19:29,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:19:29,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:19:29,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:19:29,049 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:19:29,082 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:19:29,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:19:29,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:19:29,086 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:19:29,086 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:19:29,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:19:29,086 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:19:29,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:19:29,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:19:29,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:19:29,088 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:19:29,089 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:19:29,089 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:19:29,089 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:19:29,089 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:19:29,090 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:19:29,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:19:29,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:19:29,090 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:19:29,091 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:19:29,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:19:29,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:19:29,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:19:29,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:19:29,092 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:19:29,092 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:19:29,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:19:29,093 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:19:29,093 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:19:29,093 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:19:29,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:19:29,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:19:29,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:19:29,570 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:19:29,571 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:19:29,572 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_flag-2.i [2020-10-27 01:19:29,666 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6ea74f0f/a7b52eb037c3497cbbe1b55244b57c82/FLAGffad739b7 [2020-10-27 01:19:30,517 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:19:30,517 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list_flag-2.i [2020-10-27 01:19:30,533 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6ea74f0f/a7b52eb037c3497cbbe1b55244b57c82/FLAGffad739b7 [2020-10-27 01:19:30,722 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6ea74f0f/a7b52eb037c3497cbbe1b55244b57c82 [2020-10-27 01:19:30,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:19:30,734 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:19:30,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:19:30,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:19:30,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:19:30,742 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:19:30" (1/1) ... [2020-10-27 01:19:30,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b603a3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:30, skipping insertion in model container [2020-10-27 01:19:30,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:19:30" (1/1) ... [2020-10-27 01:19:30,755 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:19:30,823 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:19:31,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:19:31,192 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:19:31,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:19:31,298 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:19:31,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:31 WrapperNode [2020-10-27 01:19:31,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:19:31,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:19:31,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:19:31,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:19:31,317 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:31" (1/1) ... [2020-10-27 01:19:31,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:31" (1/1) ... [2020-10-27 01:19:31,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:31" (1/1) ... [2020-10-27 01:19:31,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:31" (1/1) ... [2020-10-27 01:19:31,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:31" (1/1) ... [2020-10-27 01:19:31,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:31" (1/1) ... [2020-10-27 01:19:31,374 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:31" (1/1) ... [2020-10-27 01:19:31,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:19:31,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:19:31,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:19:31,382 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:19:31,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:31" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:19:31,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:19:31,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:19:31,479 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:19:31,479 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 01:19:31,479 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 01:19:31,480 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-27 01:19:31,480 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-27 01:19:31,480 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-27 01:19:31,480 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-27 01:19:31,480 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:19:31,481 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:19:31,481 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:19:31,481 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:19:31,481 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:19:31,481 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:19:31,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:19:31,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:19:31,482 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 01:19:31,482 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 01:19:31,482 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 01:19:31,482 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 01:19:31,482 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 01:19:31,483 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 01:19:31,483 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 01:19:31,483 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 01:19:31,483 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 01:19:31,483 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 01:19:31,483 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 01:19:31,484 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 01:19:31,484 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 01:19:31,484 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 01:19:31,484 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 01:19:31,484 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 01:19:31,484 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 01:19:31,485 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 01:19:31,485 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-27 01:19:31,485 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-27 01:19:31,485 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-27 01:19:31,485 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 01:19:31,485 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 01:19:31,485 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 01:19:31,486 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 01:19:31,486 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 01:19:31,486 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 01:19:31,486 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 01:19:31,486 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 01:19:31,486 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 01:19:31,486 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 01:19:31,487 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 01:19:31,487 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 01:19:31,487 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 01:19:31,487 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 01:19:31,487 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 01:19:31,487 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 01:19:31,487 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 01:19:31,488 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 01:19:31,488 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 01:19:31,488 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 01:19:31,488 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 01:19:31,488 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 01:19:31,488 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 01:19:31,489 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 01:19:31,489 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 01:19:31,489 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 01:19:31,489 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 01:19:31,489 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 01:19:31,489 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 01:19:31,490 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 01:19:31,490 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 01:19:31,490 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 01:19:31,490 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 01:19:31,490 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 01:19:31,490 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:19:31,491 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 01:19:31,491 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 01:19:31,491 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 01:19:31,491 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 01:19:31,491 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 01:19:31,491 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 01:19:31,492 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 01:19:31,492 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 01:19:31,492 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 01:19:31,492 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 01:19:31,492 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 01:19:31,492 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 01:19:31,492 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 01:19:31,493 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 01:19:31,493 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 01:19:31,493 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 01:19:31,493 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 01:19:31,493 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 01:19:31,493 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 01:19:31,494 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 01:19:31,494 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 01:19:31,494 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 01:19:31,494 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 01:19:31,494 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 01:19:31,494 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 01:19:31,494 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 01:19:31,494 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 01:19:31,495 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 01:19:31,495 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 01:19:31,495 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 01:19:31,495 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 01:19:31,495 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 01:19:31,495 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 01:19:31,495 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 01:19:31,496 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 01:19:31,496 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 01:19:31,496 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 01:19:31,496 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 01:19:31,496 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 01:19:31,496 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 01:19:31,497 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 01:19:31,497 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 01:19:31,497 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 01:19:31,497 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 01:19:31,497 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 01:19:31,497 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 01:19:31,497 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 01:19:31,498 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 01:19:31,498 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 01:19:31,498 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 01:19:31,498 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-27 01:19:31,498 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:19:31,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:19:31,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:19:31,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:19:31,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:19:31,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:19:31,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:19:31,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:19:31,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:19:31,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:19:31,871 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-27 01:19:32,226 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:19:32,227 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 01:19:32,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:19:32 BoogieIcfgContainer [2020-10-27 01:19:32,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:19:32,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:19:32,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:19:32,241 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:19:32,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:19:30" (1/3) ... [2020-10-27 01:19:32,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c2380e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:19:32, skipping insertion in model container [2020-10-27 01:19:32,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:31" (2/3) ... [2020-10-27 01:19:32,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c2380e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:19:32, skipping insertion in model container [2020-10-27 01:19:32,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:19:32" (3/3) ... [2020-10-27 01:19:32,255 INFO L111 eAbstractionObserver]: Analyzing ICFG list_flag-2.i [2020-10-27 01:19:32,269 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:19:32,275 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:19:32,291 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:19:32,331 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:19:32,331 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:19:32,332 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:19:32,332 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:19:32,332 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:19:32,332 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:19:32,332 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:19:32,332 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:19:32,360 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-27 01:19:32,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:19:32,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:32,369 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:32,370 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:32,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:32,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1727656477, now seen corresponding path program 1 times [2020-10-27 01:19:32,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:32,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319457219] [2020-10-27 01:19:32,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:32,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:32,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:32,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:32,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:33,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:33,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:19:33,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:19:33,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 467 [2020-10-27 01:19:33,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:33,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:19:33,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:19:33,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:19:33,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:19:33,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:33,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:33,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:33,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:33,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:33,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:19:33,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:33,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:33,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:33,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:33,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:33,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319457219] [2020-10-27 01:19:33,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:19:33,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:19:33,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573500117] [2020-10-27 01:19:33,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:19:33,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:33,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:19:33,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:19:33,253 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 6 states. [2020-10-27 01:19:33,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:33,557 INFO L93 Difference]: Finished difference Result 79 states and 113 transitions. [2020-10-27 01:19:33,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:19:33,559 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-27 01:19:33,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:33,569 INFO L225 Difference]: With dead ends: 79 [2020-10-27 01:19:33,569 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:19:33,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:19:33,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:19:33,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2020-10-27 01:19:33,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 01:19:33,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-10-27 01:19:33,630 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 17 [2020-10-27 01:19:33,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:33,631 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-10-27 01:19:33,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:19:33,631 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-10-27 01:19:33,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:19:33,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:33,632 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:33,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:19:33,633 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:33,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:33,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1549917714, now seen corresponding path program 1 times [2020-10-27 01:19:33,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:33,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401053833] [2020-10-27 01:19:33,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:33,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:33,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:33,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:19:33,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:33,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-27 01:19:33,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:33,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:19:33,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:19:33,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:19:33,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:33,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:33,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:33,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:33,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:33,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:33,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:33,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:19:33,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:33,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:33,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:33,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:33,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:33,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:33,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401053833] [2020-10-27 01:19:33,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:19:33,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:19:33,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108960029] [2020-10-27 01:19:33,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:19:33,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:33,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:19:33,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:19:33,893 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2020-10-27 01:19:34,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:34,025 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2020-10-27 01:19:34,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:19:34,026 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-27 01:19:34,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:34,027 INFO L225 Difference]: With dead ends: 53 [2020-10-27 01:19:34,027 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 01:19:34,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:19:34,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 01:19:34,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2020-10-27 01:19:34,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 01:19:34,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-27 01:19:34,037 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 21 [2020-10-27 01:19:34,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:34,037 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-27 01:19:34,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:19:34,037 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-27 01:19:34,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:19:34,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:34,038 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:34,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:19:34,039 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:34,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:34,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1510356189, now seen corresponding path program 1 times [2020-10-27 01:19:34,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:34,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940133831] [2020-10-27 01:19:34,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:34,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:34,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:34,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:34,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:19:34,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:34,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-27 01:19:34,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:34,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:19:34,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:19:34,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:19:34,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:34,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:34,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:34,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:34,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:34,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:34,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:34,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:19:34,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:34,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:34,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:34,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:34,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:34,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940133831] [2020-10-27 01:19:34,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:19:34,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:19:34,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452938439] [2020-10-27 01:19:34,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:19:34,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:34,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:19:34,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:19:34,256 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 6 states. [2020-10-27 01:19:34,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:34,391 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2020-10-27 01:19:34,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:19:34,391 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-27 01:19:34,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:34,393 INFO L225 Difference]: With dead ends: 51 [2020-10-27 01:19:34,393 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 01:19:34,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:19:34,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 01:19:34,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2020-10-27 01:19:34,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 01:19:34,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-27 01:19:34,401 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 21 [2020-10-27 01:19:34,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:34,401 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-27 01:19:34,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:19:34,401 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-27 01:19:34,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:19:34,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:34,402 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:34,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:19:34,403 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:34,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:34,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1100497208, now seen corresponding path program 1 times [2020-10-27 01:19:34,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:34,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323286700] [2020-10-27 01:19:34,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:34,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:34,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:34,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:34,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:19:34,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:34,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-27 01:19:34,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:34,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:19:34,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:19:34,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:19:34,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:34,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:34,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:34,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:34,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:34,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:34,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:34,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:19:34,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:34,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:34,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:34,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:34,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:34,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323286700] [2020-10-27 01:19:34,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:19:34,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:19:34,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375119171] [2020-10-27 01:19:34,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:19:34,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:34,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:19:34,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:19:34,551 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 4 states. [2020-10-27 01:19:34,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:34,623 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2020-10-27 01:19:34,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:19:34,624 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-27 01:19:34,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:34,625 INFO L225 Difference]: With dead ends: 57 [2020-10-27 01:19:34,625 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 01:19:34,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:19:34,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 01:19:34,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-10-27 01:19:34,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 01:19:34,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-10-27 01:19:34,632 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 25 [2020-10-27 01:19:34,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:34,632 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-10-27 01:19:34,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:19:34,632 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-10-27 01:19:34,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:19:34,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:34,633 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:34,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:19:34,634 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:34,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:34,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1965028247, now seen corresponding path program 1 times [2020-10-27 01:19:34,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:34,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825960594] [2020-10-27 01:19:34,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:34,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:34,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:34,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:35,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:35,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:19:35,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:19:35,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 707 [2020-10-27 01:19:35,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:35,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:19:35,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:35,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:19:35,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:35,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:35,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:35,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:35,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:35,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:35,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:19:35,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:35,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:35,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:35,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:35,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:35,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:35,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825960594] [2020-10-27 01:19:35,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:35,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:19:35,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170935117] [2020-10-27 01:19:35,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:19:35,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:35,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:19:35,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:19:35,524 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 10 states. [2020-10-27 01:19:35,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:35,810 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2020-10-27 01:19:35,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:19:35,810 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-27 01:19:35,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:35,811 INFO L225 Difference]: With dead ends: 66 [2020-10-27 01:19:35,812 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 01:19:35,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:19:35,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 01:19:35,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2020-10-27 01:19:35,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 01:19:35,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-10-27 01:19:35,820 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 25 [2020-10-27 01:19:35,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:35,821 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-10-27 01:19:35,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:19:35,821 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-10-27 01:19:35,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:19:35,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:35,822 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:35,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:19:35,823 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:35,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:35,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1914606410, now seen corresponding path program 1 times [2020-10-27 01:19:35,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:35,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020971119] [2020-10-27 01:19:35,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:35,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:35,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:35,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:36,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:36,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:19:36,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:19:36,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 471 [2020-10-27 01:19:36,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:36,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:19:36,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:36,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:19:36,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:36,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:36,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:36,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:36,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:36,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:36,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:36,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:19:36,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:36,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:36,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:36,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:36,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:36,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:36,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020971119] [2020-10-27 01:19:36,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:36,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:19:36,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948445228] [2020-10-27 01:19:36,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:19:36,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:36,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:19:36,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:19:36,453 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 10 states. [2020-10-27 01:19:36,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:36,701 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2020-10-27 01:19:36,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:19:36,701 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-27 01:19:36,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:36,703 INFO L225 Difference]: With dead ends: 80 [2020-10-27 01:19:36,704 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 01:19:36,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:19:36,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 01:19:36,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2020-10-27 01:19:36,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 01:19:36,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-10-27 01:19:36,715 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 25 [2020-10-27 01:19:36,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:36,715 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-10-27 01:19:36,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:19:36,715 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-10-27 01:19:36,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:19:36,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:36,717 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:36,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:19:36,717 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:36,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:36,718 INFO L82 PathProgramCache]: Analyzing trace with hash 685164569, now seen corresponding path program 1 times [2020-10-27 01:19:36,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:36,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751156368] [2020-10-27 01:19:36,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:36,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:36,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:36,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:19:36,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:36,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-27 01:19:36,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:36,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:19:36,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:19:36,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:19:36,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:36,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:36,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:36,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:36,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:36,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:36,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:19:36,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:36,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:36,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:36,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:36,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:36,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751156368] [2020-10-27 01:19:36,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:19:36,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:19:36,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330725209] [2020-10-27 01:19:36,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:19:36,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:36,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:19:36,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:19:36,824 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 4 states. [2020-10-27 01:19:36,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:36,888 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-10-27 01:19:36,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:19:36,888 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-27 01:19:36,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:36,889 INFO L225 Difference]: With dead ends: 74 [2020-10-27 01:19:36,890 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 01:19:36,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:19:36,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 01:19:36,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2020-10-27 01:19:36,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 01:19:36,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-10-27 01:19:36,898 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 25 [2020-10-27 01:19:36,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:36,898 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-10-27 01:19:36,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:19:36,899 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-10-27 01:19:36,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:19:36,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:36,900 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:36,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:19:36,900 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:36,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:36,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1562271954, now seen corresponding path program 1 times [2020-10-27 01:19:36,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:36,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145921439] [2020-10-27 01:19:36,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:36,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:37,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:37,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:19:37,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:37,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-27 01:19:37,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:37,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:19:37,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:37,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:19:37,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:37,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:37,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:37,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:37,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:37,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:37,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:37,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:19:37,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:37,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:37,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:37,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:37,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:19:37,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:37,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145921439] [2020-10-27 01:19:37,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:37,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:19:37,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081589659] [2020-10-27 01:19:37,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:19:37,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:37,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:19:37,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:19:37,244 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 10 states. [2020-10-27 01:19:37,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:37,553 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2020-10-27 01:19:37,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:19:37,554 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 01:19:37,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:37,555 INFO L225 Difference]: With dead ends: 80 [2020-10-27 01:19:37,555 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 01:19:37,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:19:37,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 01:19:37,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 59. [2020-10-27 01:19:37,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 01:19:37,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2020-10-27 01:19:37,565 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 27 [2020-10-27 01:19:37,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:37,565 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2020-10-27 01:19:37,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:19:37,565 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2020-10-27 01:19:37,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:19:37,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:37,567 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:37,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:19:37,567 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:37,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:37,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1060531021, now seen corresponding path program 2 times [2020-10-27 01:19:37,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:37,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159991853] [2020-10-27 01:19:37,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:37,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:37,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:37,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:19:37,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:37,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-27 01:19:37,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:37,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:19:37,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:37,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:19:37,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:37,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:37,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:37,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:37,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:37,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:37,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:19:37,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:37,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:37,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:37,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:37,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:37,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:37,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159991853] [2020-10-27 01:19:37,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:37,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:19:37,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417635718] [2020-10-27 01:19:37,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:19:37,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:37,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:19:37,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:19:37,882 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 10 states. [2020-10-27 01:19:38,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:38,158 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2020-10-27 01:19:38,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:19:38,159 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-27 01:19:38,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:38,160 INFO L225 Difference]: With dead ends: 82 [2020-10-27 01:19:38,160 INFO L226 Difference]: Without dead ends: 68 [2020-10-27 01:19:38,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:19:38,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-27 01:19:38,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2020-10-27 01:19:38,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 01:19:38,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-10-27 01:19:38,168 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 29 [2020-10-27 01:19:38,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:38,169 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-10-27 01:19:38,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:19:38,169 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-10-27 01:19:38,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:19:38,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:38,170 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:38,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:19:38,170 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:38,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:38,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1358054848, now seen corresponding path program 1 times [2020-10-27 01:19:38,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:38,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916325708] [2020-10-27 01:19:38,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:38,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:38,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:38,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:19:38,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:38,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-27 01:19:38,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:38,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:19:38,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:38,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:19:38,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:38,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:38,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:38,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:38,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:38,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:38,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:38,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:19:38,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:38,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:38,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:38,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:38,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:38,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:38,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916325708] [2020-10-27 01:19:38,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:38,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:19:38,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414006150] [2020-10-27 01:19:38,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:19:38,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:38,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:19:38,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:19:38,483 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 10 states. [2020-10-27 01:19:38,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:38,754 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2020-10-27 01:19:38,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:19:38,754 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-27 01:19:38,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:38,756 INFO L225 Difference]: With dead ends: 76 [2020-10-27 01:19:38,756 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 01:19:38,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:19:38,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 01:19:38,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2020-10-27 01:19:38,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 01:19:38,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-27 01:19:38,763 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 29 [2020-10-27 01:19:38,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:38,763 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-27 01:19:38,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:19:38,764 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-27 01:19:38,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:19:38,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:38,765 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] [2020-10-27 01:19:38,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:19:38,765 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:38,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:38,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1750655732, now seen corresponding path program 2 times [2020-10-27 01:19:38,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:38,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928214405] [2020-10-27 01:19:38,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:38,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:38,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:39,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:39,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:19:39,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:19:39,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 581 [2020-10-27 01:19:39,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:39,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:19:39,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:39,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:19:39,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:39,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:39,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:39,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:39,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:39,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:39,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:39,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:19:39,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:39,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:39,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:39,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:39,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:39,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:39,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928214405] [2020-10-27 01:19:39,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:39,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:19:39,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881918518] [2020-10-27 01:19:39,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:19:39,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:39,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:19:39,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:19:39,572 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 12 states. [2020-10-27 01:19:39,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:39,778 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2020-10-27 01:19:39,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:19:39,778 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-27 01:19:39,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:39,779 INFO L225 Difference]: With dead ends: 60 [2020-10-27 01:19:39,779 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 01:19:39,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:19:39,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 01:19:39,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-10-27 01:19:39,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:19:39,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-27 01:19:39,787 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 31 [2020-10-27 01:19:39,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:39,787 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-27 01:19:39,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:19:39,787 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-27 01:19:39,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:19:39,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:39,788 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] [2020-10-27 01:19:39,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:19:39,789 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:39,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:39,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1378375743, now seen corresponding path program 2 times [2020-10-27 01:19:39,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:39,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445543225] [2020-10-27 01:19:39,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:39,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:39,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:40,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:40,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:19:40,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:19:40,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 497 [2020-10-27 01:19:40,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:40,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:19:40,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:40,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:19:40,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:40,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:40,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:40,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:40,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:40,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:40,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:19:40,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:40,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:40,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:40,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:40,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:40,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445543225] [2020-10-27 01:19:40,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:40,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:19:40,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313746241] [2020-10-27 01:19:40,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:19:40,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:40,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:19:40,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:19:40,467 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 12 states. [2020-10-27 01:19:40,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:40,676 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2020-10-27 01:19:40,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:19:40,677 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-27 01:19:40,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:40,678 INFO L225 Difference]: With dead ends: 57 [2020-10-27 01:19:40,678 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 01:19:40,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:19:40,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 01:19:40,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-27 01:19:40,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 01:19:40,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-27 01:19:40,685 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 31 [2020-10-27 01:19:40,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:40,685 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-27 01:19:40,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:19:40,685 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-27 01:19:40,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:19:40,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:40,686 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:40,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:19:40,687 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:40,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:40,687 INFO L82 PathProgramCache]: Analyzing trace with hash -92208889, now seen corresponding path program 3 times [2020-10-27 01:19:40,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:40,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878127630] [2020-10-27 01:19:40,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:40,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:40,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:41,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:41,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:19:41,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:41,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-27 01:19:41,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:41,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:19:41,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:41,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:19:41,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:41,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:41,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:41,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:41,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:41,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:41,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:19:41,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:41,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:41,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:41,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:41,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:41,379 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:41,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878127630] [2020-10-27 01:19:41,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:41,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:19:41,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393552239] [2020-10-27 01:19:41,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:19:41,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:41,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:19:41,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:19:41,383 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 13 states. [2020-10-27 01:19:41,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:41,908 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2020-10-27 01:19:41,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:19:41,909 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-27 01:19:41,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:41,910 INFO L225 Difference]: With dead ends: 77 [2020-10-27 01:19:41,910 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 01:19:41,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:19:41,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 01:19:41,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2020-10-27 01:19:41,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 01:19:41,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2020-10-27 01:19:41,918 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 33 [2020-10-27 01:19:41,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:41,919 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2020-10-27 01:19:41,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:19:41,919 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2020-10-27 01:19:41,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:19:41,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:41,920 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:41,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:19:41,920 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:41,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:41,921 INFO L82 PathProgramCache]: Analyzing trace with hash 2043665564, now seen corresponding path program 2 times [2020-10-27 01:19:41,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:41,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445393180] [2020-10-27 01:19:41,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:41,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:41,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:42,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:42,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:19:42,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:42,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-27 01:19:42,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:42,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:19:42,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:42,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:19:42,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:42,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:42,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:42,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:42,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:42,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:42,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:19:42,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:42,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:42,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:42,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:42,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:42,541 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:42,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445393180] [2020-10-27 01:19:42,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:42,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:19:42,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699904969] [2020-10-27 01:19:42,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:19:42,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:42,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:19:42,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:19:42,543 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 13 states. [2020-10-27 01:19:43,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:43,164 INFO L93 Difference]: Finished difference Result 85 states and 91 transitions. [2020-10-27 01:19:43,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:19:43,165 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-27 01:19:43,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:43,166 INFO L225 Difference]: With dead ends: 85 [2020-10-27 01:19:43,166 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 01:19:43,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:19:43,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 01:19:43,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2020-10-27 01:19:43,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 01:19:43,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2020-10-27 01:19:43,175 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 33 [2020-10-27 01:19:43,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:43,175 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2020-10-27 01:19:43,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:19:43,175 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2020-10-27 01:19:43,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:19:43,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:43,177 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:43,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:19:43,177 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:43,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:43,178 INFO L82 PathProgramCache]: Analyzing trace with hash 242340418, now seen corresponding path program 4 times [2020-10-27 01:19:43,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:43,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178893498] [2020-10-27 01:19:43,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:43,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:43,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:43,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:43,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:19:43,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:43,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-10-27 01:19:43,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:43,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:19:43,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:43,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:19:43,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:43,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:43,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:43,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:43,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:43,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:43,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:43,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:19:43,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:43,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:43,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:43,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:43,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:43,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:43,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178893498] [2020-10-27 01:19:43,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:43,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:19:43,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439986311] [2020-10-27 01:19:43,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:19:43,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:43,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:19:43,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:19:43,918 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 13 states. [2020-10-27 01:19:44,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:44,488 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2020-10-27 01:19:44,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:19:44,488 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-27 01:19:44,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:44,489 INFO L225 Difference]: With dead ends: 93 [2020-10-27 01:19:44,489 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 01:19:44,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:19:44,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 01:19:44,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2020-10-27 01:19:44,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 01:19:44,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2020-10-27 01:19:44,503 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 35 [2020-10-27 01:19:44,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:44,503 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2020-10-27 01:19:44,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:19:44,503 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2020-10-27 01:19:44,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:19:44,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:44,504 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:44,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:19:44,504 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:44,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:44,505 INFO L82 PathProgramCache]: Analyzing trace with hash -378322755, now seen corresponding path program 5 times [2020-10-27 01:19:44,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:44,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628502748] [2020-10-27 01:19:44,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:44,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:44,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:44,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:44,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:19:44,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:44,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 313 [2020-10-27 01:19:44,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:44,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:19:44,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:44,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:19:44,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:45,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:45,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:45,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:45,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:45,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:45,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:19:45,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:45,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:45,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:45,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:45,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:45,326 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:45,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628502748] [2020-10-27 01:19:45,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:45,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:19:45,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421678380] [2020-10-27 01:19:45,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:19:45,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:45,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:19:45,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:19:45,329 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand 13 states. [2020-10-27 01:19:45,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:45,836 INFO L93 Difference]: Finished difference Result 95 states and 101 transitions. [2020-10-27 01:19:45,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:19:45,837 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-27 01:19:45,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:45,838 INFO L225 Difference]: With dead ends: 95 [2020-10-27 01:19:45,839 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 01:19:45,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:19:45,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 01:19:45,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2020-10-27 01:19:45,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 01:19:45,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2020-10-27 01:19:45,851 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 37 [2020-10-27 01:19:45,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:45,852 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2020-10-27 01:19:45,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:19:45,852 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2020-10-27 01:19:45,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:19:45,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:45,853 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:45,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:19:45,853 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:45,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:45,854 INFO L82 PathProgramCache]: Analyzing trace with hash 559584786, now seen corresponding path program 3 times [2020-10-27 01:19:45,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:45,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700828135] [2020-10-27 01:19:45,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:45,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:45,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:46,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:46,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:19:46,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:46,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 381 [2020-10-27 01:19:46,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:46,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:19:46,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:46,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:19:46,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:46,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:46,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:46,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:46,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:46,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:46,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:19:46,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:46,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:46,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:46,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:46,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:46,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700828135] [2020-10-27 01:19:46,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:46,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:19:46,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860809386] [2020-10-27 01:19:46,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:19:46,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:46,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:19:46,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:19:46,718 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand 13 states. [2020-10-27 01:19:47,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:47,204 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2020-10-27 01:19:47,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:19:47,204 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-27 01:19:47,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:47,206 INFO L225 Difference]: With dead ends: 87 [2020-10-27 01:19:47,206 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 01:19:47,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:19:47,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 01:19:47,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2020-10-27 01:19:47,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 01:19:47,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2020-10-27 01:19:47,213 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 37 [2020-10-27 01:19:47,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:47,214 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2020-10-27 01:19:47,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:19:47,214 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2020-10-27 01:19:47,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:19:47,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:47,215 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] [2020-10-27 01:19:47,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:19:47,215 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:47,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:47,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1595270524, now seen corresponding path program 6 times [2020-10-27 01:19:47,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:47,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997472065] [2020-10-27 01:19:47,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:47,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:47,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:47,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:19:47,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:47,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 506 [2020-10-27 01:19:47,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:47,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:19:47,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:47,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:19:47,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:48,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:48,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:48,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:48,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:48,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:48,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:48,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:19:48,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:48,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:48,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:48,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:48,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:48,159 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:48,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997472065] [2020-10-27 01:19:48,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:48,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:19:48,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038618985] [2020-10-27 01:19:48,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:19:48,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:48,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:19:48,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:19:48,166 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 15 states. [2020-10-27 01:19:48,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:48,987 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2020-10-27 01:19:48,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:19:48,987 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-27 01:19:48,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:48,988 INFO L225 Difference]: With dead ends: 71 [2020-10-27 01:19:48,988 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 01:19:48,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:19:48,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 01:19:49,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-27 01:19:49,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 01:19:49,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-10-27 01:19:49,001 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 39 [2020-10-27 01:19:49,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:49,002 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-10-27 01:19:49,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:19:49,002 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-10-27 01:19:49,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:19:49,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:49,002 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] [2020-10-27 01:19:49,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:19:49,003 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:49,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:49,004 INFO L82 PathProgramCache]: Analyzing trace with hash 822381075, now seen corresponding path program 4 times [2020-10-27 01:19:49,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:49,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887090622] [2020-10-27 01:19:49,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:49,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:49,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:49,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:49,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:19:49,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:49,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 427 [2020-10-27 01:19:49,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:49,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:19:49,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:49,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:19:49,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:49,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:49,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:49,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:49,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:49,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:49,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:49,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:19:49,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:49,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:49,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:49,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:49,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:49,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887090622] [2020-10-27 01:19:49,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:49,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:19:49,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529525010] [2020-10-27 01:19:49,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:19:49,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:49,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:19:49,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:19:49,884 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 15 states. [2020-10-27 01:19:50,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:50,739 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2020-10-27 01:19:50,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:19:50,740 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-27 01:19:50,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:50,741 INFO L225 Difference]: With dead ends: 73 [2020-10-27 01:19:50,741 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 01:19:50,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:19:50,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 01:19:50,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-27 01:19:50,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 01:19:50,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2020-10-27 01:19:50,749 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 39 [2020-10-27 01:19:50,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:50,750 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2020-10-27 01:19:50,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:19:50,750 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2020-10-27 01:19:50,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:19:50,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:50,750 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:50,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:19:50,751 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:50,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:50,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1587581577, now seen corresponding path program 7 times [2020-10-27 01:19:50,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:50,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714039197] [2020-10-27 01:19:50,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:50,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:50,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:51,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:51,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:19:51,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:51,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 502 [2020-10-27 01:19:51,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:51,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:19:51,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:51,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:19:51,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:51,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:51,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:51,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:51,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:51,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:51,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:51,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:19:51,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:51,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:51,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:51,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:51,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:51,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714039197] [2020-10-27 01:19:51,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:51,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:19:51,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256521038] [2020-10-27 01:19:51,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:19:51,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:51,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:19:51,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:19:51,889 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 16 states. [2020-10-27 01:19:53,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:53,124 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2020-10-27 01:19:53,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:19:53,124 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-27 01:19:53,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:53,125 INFO L225 Difference]: With dead ends: 95 [2020-10-27 01:19:53,125 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 01:19:53,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:19:53,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 01:19:53,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2020-10-27 01:19:53,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 01:19:53,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2020-10-27 01:19:53,138 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 41 [2020-10-27 01:19:53,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:53,139 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2020-10-27 01:19:53,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:19:53,139 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2020-10-27 01:19:53,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:19:53,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:53,139 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:53,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:19:53,140 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:53,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:53,140 INFO L82 PathProgramCache]: Analyzing trace with hash -447909266, now seen corresponding path program 5 times [2020-10-27 01:19:53,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:53,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514867342] [2020-10-27 01:19:53,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:53,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:53,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:53,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:53,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:19:53,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:53,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 569 [2020-10-27 01:19:53,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:53,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:19:53,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:53,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:19:53,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:54,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:54,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:54,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:54,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:54,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:54,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:54,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:19:54,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:54,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:54,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:54,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:54,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:54,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514867342] [2020-10-27 01:19:54,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:54,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:19:54,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661386749] [2020-10-27 01:19:54,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:19:54,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:54,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:19:54,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:19:54,325 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 16 states. [2020-10-27 01:19:55,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:55,619 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2020-10-27 01:19:55,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:19:55,619 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-27 01:19:55,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:55,621 INFO L225 Difference]: With dead ends: 103 [2020-10-27 01:19:55,622 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 01:19:55,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:19:55,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 01:19:55,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2020-10-27 01:19:55,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 01:19:55,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2020-10-27 01:19:55,633 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 41 [2020-10-27 01:19:55,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:55,633 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2020-10-27 01:19:55,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:19:55,634 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2020-10-27 01:19:55,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:19:55,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:55,634 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:55,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:19:55,635 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:55,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:55,635 INFO L82 PathProgramCache]: Analyzing trace with hash 2003231410, now seen corresponding path program 8 times [2020-10-27 01:19:55,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:55,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007025547] [2020-10-27 01:19:55,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:55,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:55,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:56,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:56,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 01:19:56,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:56,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 632 [2020-10-27 01:19:56,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:56,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:19:56,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:56,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:19:56,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:56,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:56,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:56,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:56,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:56,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:56,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:19:56,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:56,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:56,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:56,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:56,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:56,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007025547] [2020-10-27 01:19:56,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:56,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:19:56,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636450616] [2020-10-27 01:19:56,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:19:56,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:56,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:19:56,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:19:56,864 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand 16 states. [2020-10-27 01:19:57,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:57,656 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2020-10-27 01:19:57,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:19:57,656 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-27 01:19:57,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:57,657 INFO L225 Difference]: With dead ends: 113 [2020-10-27 01:19:57,657 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 01:19:57,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:19:57,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 01:19:57,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 91. [2020-10-27 01:19:57,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 01:19:57,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2020-10-27 01:19:57,668 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 43 [2020-10-27 01:19:57,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:57,668 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2020-10-27 01:19:57,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:19:57,668 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2020-10-27 01:19:57,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:19:57,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:57,669 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:57,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:19:57,669 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:57,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:57,670 INFO L82 PathProgramCache]: Analyzing trace with hash -379194067, now seen corresponding path program 9 times [2020-10-27 01:19:57,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:57,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703963358] [2020-10-27 01:19:57,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:57,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:58,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:58,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:19:58,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:58,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 646 [2020-10-27 01:19:58,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:58,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:19:58,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:58,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:19:58,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:58,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:58,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:58,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:58,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:58,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:58,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:58,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:19:58,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:58,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:58,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:58,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:58,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:58,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703963358] [2020-10-27 01:19:58,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:58,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:19:58,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840865010] [2020-10-27 01:19:58,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:19:58,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:58,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:19:58,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:19:58,916 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand 16 states. [2020-10-27 01:19:59,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:59,626 INFO L93 Difference]: Finished difference Result 115 states and 121 transitions. [2020-10-27 01:19:59,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:19:59,627 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-27 01:19:59,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:59,628 INFO L225 Difference]: With dead ends: 115 [2020-10-27 01:19:59,628 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 01:19:59,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:19:59,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 01:19:59,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 85. [2020-10-27 01:19:59,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 01:19:59,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2020-10-27 01:19:59,639 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 45 [2020-10-27 01:19:59,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:59,640 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2020-10-27 01:19:59,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:19:59,640 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2020-10-27 01:19:59,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:19:59,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:59,640 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:59,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:19:59,641 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:59,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:59,641 INFO L82 PathProgramCache]: Analyzing trace with hash -980094236, now seen corresponding path program 6 times [2020-10-27 01:19:59,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:59,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438556554] [2020-10-27 01:19:59,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:59,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:00,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:00,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:20:00,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:00,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 595 [2020-10-27 01:20:00,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:00,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:20:00,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:00,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:20:00,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:00,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:00,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:00,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:00,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:00,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:00,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:20:00,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:00,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:00,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:00,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:00,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:00,743 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:00,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438556554] [2020-10-27 01:20:00,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:00,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:20:00,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351681076] [2020-10-27 01:20:00,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:20:00,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:00,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:20:00,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:20:00,746 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand 16 states. [2020-10-27 01:20:01,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:01,406 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2020-10-27 01:20:01,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:20:01,407 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-27 01:20:01,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:01,408 INFO L225 Difference]: With dead ends: 105 [2020-10-27 01:20:01,408 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 01:20:01,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:20:01,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 01:20:01,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2020-10-27 01:20:01,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 01:20:01,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2020-10-27 01:20:01,426 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 45 [2020-10-27 01:20:01,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:01,427 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2020-10-27 01:20:01,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:20:01,427 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2020-10-27 01:20:01,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:20:01,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:01,427 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:01,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:20:01,428 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:01,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:01,428 INFO L82 PathProgramCache]: Analyzing trace with hash -401142548, now seen corresponding path program 10 times [2020-10-27 01:20:01,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:01,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268774405] [2020-10-27 01:20:01,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:01,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:01,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:02,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:02,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:20:02,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:02,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 811 [2020-10-27 01:20:02,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:02,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:20:02,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:02,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:20:02,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:02,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:02,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:02,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:02,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:02,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:02,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:02,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:20:02,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:02,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:02,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:02,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:02,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:02,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268774405] [2020-10-27 01:20:02,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:02,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:20:02,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101097762] [2020-10-27 01:20:02,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:20:02,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:02,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:20:02,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:20:02,906 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 18 states. [2020-10-27 01:20:03,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:03,898 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2020-10-27 01:20:03,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:20:03,898 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-10-27 01:20:03,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:03,899 INFO L225 Difference]: With dead ends: 87 [2020-10-27 01:20:03,899 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 01:20:03,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:20:03,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 01:20:03,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-27 01:20:03,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 01:20:03,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-10-27 01:20:03,908 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 47 [2020-10-27 01:20:03,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:03,908 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-10-27 01:20:03,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:20:03,909 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-10-27 01:20:03,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:20:03,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:03,909 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:03,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:20:03,910 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:03,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:03,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1398061285, now seen corresponding path program 7 times [2020-10-27 01:20:03,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:03,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804205807] [2020-10-27 01:20:03,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:03,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:03,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:04,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:04,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:20:04,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:04,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 825 [2020-10-27 01:20:04,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:04,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:20:04,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:04,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:20:04,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:05,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:05,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:05,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:05,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:05,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:05,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:05,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:20:05,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:05,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:05,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:05,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:05,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:05,379 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:05,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804205807] [2020-10-27 01:20:05,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:05,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:20:05,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411439579] [2020-10-27 01:20:05,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:20:05,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:05,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:20:05,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:20:05,383 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 18 states. [2020-10-27 01:20:06,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:06,531 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2020-10-27 01:20:06,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:20:06,531 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-10-27 01:20:06,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:06,532 INFO L225 Difference]: With dead ends: 89 [2020-10-27 01:20:06,532 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 01:20:06,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:20:06,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 01:20:06,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-27 01:20:06,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 01:20:06,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2020-10-27 01:20:06,541 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 47 [2020-10-27 01:20:06,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:06,541 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2020-10-27 01:20:06,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:20:06,541 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2020-10-27 01:20:06,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:20:06,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:06,542 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:06,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:20:06,542 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:06,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:06,543 INFO L82 PathProgramCache]: Analyzing trace with hash -290162457, now seen corresponding path program 11 times [2020-10-27 01:20:06,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:06,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210979908] [2020-10-27 01:20:06,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:06,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:06,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:07,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:07,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:20:07,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:07,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 891 [2020-10-27 01:20:07,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:07,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:20:07,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:07,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:20:07,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:08,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:08,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:08,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:08,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:08,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:08,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:08,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:20:08,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:08,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:08,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:08,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:08,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:08,310 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:08,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210979908] [2020-10-27 01:20:08,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:08,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:20:08,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978972461] [2020-10-27 01:20:08,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:20:08,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:08,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:20:08,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:20:08,312 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 19 states. [2020-10-27 01:20:09,012 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-10-27 01:20:09,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:09,514 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2020-10-27 01:20:09,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:20:09,515 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2020-10-27 01:20:09,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:09,516 INFO L225 Difference]: With dead ends: 113 [2020-10-27 01:20:09,516 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 01:20:09,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:20:09,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 01:20:09,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2020-10-27 01:20:09,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 01:20:09,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2020-10-27 01:20:09,526 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 49 [2020-10-27 01:20:09,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:09,526 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2020-10-27 01:20:09,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:20:09,526 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2020-10-27 01:20:09,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:20:09,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:09,527 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:09,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:20:09,527 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:09,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:09,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1270008640, now seen corresponding path program 8 times [2020-10-27 01:20:09,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:09,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752295903] [2020-10-27 01:20:09,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:09,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:09,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:10,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:10,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:20:10,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:10,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 854 [2020-10-27 01:20:10,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:10,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:20:10,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:10,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:20:10,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:11,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:11,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:11,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:11,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:11,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:11,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:20:11,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:11,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:11,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:11,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:11,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:11,159 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:11,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752295903] [2020-10-27 01:20:11,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:11,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:20:11,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687585053] [2020-10-27 01:20:11,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:20:11,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:11,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:20:11,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:20:11,161 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand 19 states. [2020-10-27 01:20:12,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:12,619 INFO L93 Difference]: Finished difference Result 121 states and 127 transitions. [2020-10-27 01:20:12,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:20:12,620 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2020-10-27 01:20:12,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:12,622 INFO L225 Difference]: With dead ends: 121 [2020-10-27 01:20:12,622 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 01:20:12,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:20:12,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 01:20:12,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 103. [2020-10-27 01:20:12,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-27 01:20:12,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 109 transitions. [2020-10-27 01:20:12,634 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 109 transitions. Word has length 49 [2020-10-27 01:20:12,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:12,634 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 109 transitions. [2020-10-27 01:20:12,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:20:12,634 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 109 transitions. [2020-10-27 01:20:12,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:20:12,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:12,635 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:12,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:20:12,635 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:12,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:12,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1012477406, now seen corresponding path program 12 times [2020-10-27 01:20:12,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:12,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713299019] [2020-10-27 01:20:12,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:12,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:12,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:13,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:13,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 01:20:13,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:13,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 872 [2020-10-27 01:20:13,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:13,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:20:13,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:13,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 01:20:13,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:14,008 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-27 01:20:14,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:14,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:14,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:14,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:14,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:14,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:14,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:20:14,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:14,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:14,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:14,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:14,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:14,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713299019] [2020-10-27 01:20:14,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:14,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:20:14,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775406947] [2020-10-27 01:20:14,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:20:14,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:14,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:20:14,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:20:14,569 INFO L87 Difference]: Start difference. First operand 103 states and 109 transitions. Second operand 19 states. [2020-10-27 01:20:15,422 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-10-27 01:20:16,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:16,134 INFO L93 Difference]: Finished difference Result 133 states and 140 transitions. [2020-10-27 01:20:16,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:20:16,134 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2020-10-27 01:20:16,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:16,136 INFO L225 Difference]: With dead ends: 133 [2020-10-27 01:20:16,136 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 01:20:16,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:20:16,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 01:20:16,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 107. [2020-10-27 01:20:16,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 01:20:16,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 113 transitions. [2020-10-27 01:20:16,148 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 113 transitions. Word has length 51 [2020-10-27 01:20:16,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:16,148 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 113 transitions. [2020-10-27 01:20:16,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:20:16,148 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 113 transitions. [2020-10-27 01:20:16,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 01:20:16,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:16,149 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:16,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:20:16,149 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:16,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:16,150 INFO L82 PathProgramCache]: Analyzing trace with hash 627558557, now seen corresponding path program 13 times [2020-10-27 01:20:16,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:16,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212261376] [2020-10-27 01:20:16,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:16,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:17,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:17,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 01:20:17,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:17,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 870 [2020-10-27 01:20:17,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:17,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:20:17,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:17,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:20:17,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:17,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:17,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:17,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:17,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:17,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:17,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:17,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:20:17,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:17,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:17,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:17,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:17,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:17,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212261376] [2020-10-27 01:20:17,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:17,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:20:17,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435106379] [2020-10-27 01:20:17,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:20:17,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:17,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:20:17,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:20:17,732 INFO L87 Difference]: Start difference. First operand 107 states and 113 transitions. Second operand 19 states. [2020-10-27 01:20:19,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:19,063 INFO L93 Difference]: Finished difference Result 135 states and 141 transitions. [2020-10-27 01:20:19,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:20:19,064 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2020-10-27 01:20:19,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:19,065 INFO L225 Difference]: With dead ends: 135 [2020-10-27 01:20:19,065 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 01:20:19,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:20:19,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 01:20:19,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 101. [2020-10-27 01:20:19,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 01:20:19,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2020-10-27 01:20:19,077 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 53 [2020-10-27 01:20:19,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:19,077 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2020-10-27 01:20:19,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:20:19,077 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2020-10-27 01:20:19,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 01:20:19,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:19,078 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:19,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:20:19,078 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:19,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:19,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1352188874, now seen corresponding path program 9 times [2020-10-27 01:20:19,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:19,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935499622] [2020-10-27 01:20:19,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:19,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:19,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:19,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:19,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 01:20:19,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:19,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 849 [2020-10-27 01:20:19,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:19,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:20:19,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:19,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:20:19,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:20,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:20,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:20,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:20,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:20,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:20,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:20:20,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:20,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:20,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:20,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:20,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:20,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935499622] [2020-10-27 01:20:20,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:20,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:20:20,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551867326] [2020-10-27 01:20:20,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:20:20,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:20,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:20:20,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:20:20,671 INFO L87 Difference]: Start difference. First operand 101 states and 106 transitions. Second operand 19 states. [2020-10-27 01:20:21,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:21,901 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2020-10-27 01:20:21,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:20:21,902 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2020-10-27 01:20:21,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:21,903 INFO L225 Difference]: With dead ends: 123 [2020-10-27 01:20:21,903 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 01:20:21,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:20:21,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 01:20:21,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 95. [2020-10-27 01:20:21,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 01:20:21,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2020-10-27 01:20:21,916 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 53 [2020-10-27 01:20:21,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:21,916 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2020-10-27 01:20:21,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:20:21,916 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2020-10-27 01:20:21,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 01:20:21,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:21,917 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:21,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:20:21,924 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:21,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:21,925 INFO L82 PathProgramCache]: Analyzing trace with hash -761015460, now seen corresponding path program 14 times [2020-10-27 01:20:21,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:21,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726795952] [2020-10-27 01:20:21,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:21,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:22,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:22,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 01:20:22,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:22,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 812 [2020-10-27 01:20:22,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:22,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:20:22,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:22,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 01:20:22,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:23,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:23,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:23,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:23,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:23,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:23,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:23,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:20:23,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:23,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:23,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:23,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:23,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:23,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726795952] [2020-10-27 01:20:23,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:23,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:20:23,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91005658] [2020-10-27 01:20:23,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:20:23,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:23,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:20:23,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:20:23,872 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 21 states. [2020-10-27 01:20:24,608 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2020-10-27 01:20:24,782 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2020-10-27 01:20:24,952 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2020-10-27 01:20:25,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:25,369 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2020-10-27 01:20:25,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:20:25,369 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-10-27 01:20:25,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:25,371 INFO L225 Difference]: With dead ends: 103 [2020-10-27 01:20:25,371 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 01:20:25,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:20:25,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 01:20:25,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-27 01:20:25,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 01:20:25,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2020-10-27 01:20:25,380 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 55 [2020-10-27 01:20:25,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:25,381 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2020-10-27 01:20:25,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:20:25,381 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2020-10-27 01:20:25,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 01:20:25,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:25,381 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:25,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:20:25,382 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:25,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:25,382 INFO L82 PathProgramCache]: Analyzing trace with hash -847375305, now seen corresponding path program 10 times [2020-10-27 01:20:25,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:25,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499304447] [2020-10-27 01:20:25,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:25,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:25,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:26,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:26,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 01:20:26,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:26,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 869 [2020-10-27 01:20:26,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:26,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:20:26,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:26,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 01:20:26,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:26,909 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-27 01:20:27,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:27,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:27,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:27,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:27,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:27,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:20:27,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:27,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:27,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:27,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:27,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:27,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499304447] [2020-10-27 01:20:27,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:27,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:20:27,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298226385] [2020-10-27 01:20:27,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:20:27,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:27,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:20:27,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:20:27,361 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 21 states. [2020-10-27 01:20:28,269 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 64 [2020-10-27 01:20:28,445 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2020-10-27 01:20:28,599 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2020-10-27 01:20:28,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:28,998 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2020-10-27 01:20:28,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:20:28,999 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-10-27 01:20:28,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:29,000 INFO L225 Difference]: With dead ends: 105 [2020-10-27 01:20:29,000 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 01:20:29,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:20:29,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 01:20:29,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-27 01:20:29,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 01:20:29,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2020-10-27 01:20:29,011 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 55 [2020-10-27 01:20:29,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:29,011 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2020-10-27 01:20:29,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:20:29,011 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2020-10-27 01:20:29,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 01:20:29,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:29,012 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:29,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:20:29,012 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:29,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:29,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1764320087, now seen corresponding path program 15 times [2020-10-27 01:20:29,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:29,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738980625] [2020-10-27 01:20:29,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:29,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:30,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:30,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 01:20:30,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:30,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1035 [2020-10-27 01:20:30,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:30,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:20:30,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:30,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 01:20:30,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:30,760 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2020-10-27 01:20:31,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:31,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:31,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:31,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:31,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:31,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:31,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:20:31,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:31,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:31,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:31,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:31,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:31,453 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:31,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738980625] [2020-10-27 01:20:31,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:31,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:20:31,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798767100] [2020-10-27 01:20:31,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:20:31,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:31,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:20:31,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:20:31,455 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand 22 states. [2020-10-27 01:20:32,430 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2020-10-27 01:20:32,585 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-10-27 01:20:33,044 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-10-27 01:20:33,734 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 82 [2020-10-27 01:20:34,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:34,497 INFO L93 Difference]: Finished difference Result 131 states and 136 transitions. [2020-10-27 01:20:34,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:20:34,497 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 57 [2020-10-27 01:20:34,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:34,499 INFO L225 Difference]: With dead ends: 131 [2020-10-27 01:20:34,499 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 01:20:34,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=203, Invalid=1959, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:20:34,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 01:20:34,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 109. [2020-10-27 01:20:34,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-27 01:20:34,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 114 transitions. [2020-10-27 01:20:34,509 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 114 transitions. Word has length 57 [2020-10-27 01:20:34,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:34,509 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 114 transitions. [2020-10-27 01:20:34,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:20:34,510 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 114 transitions. [2020-10-27 01:20:34,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 01:20:34,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:34,510 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:34,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:20:34,511 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:34,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:34,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1233978258, now seen corresponding path program 11 times [2020-10-27 01:20:34,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:34,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26688599] [2020-10-27 01:20:34,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:34,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:34,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:35,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:35,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 01:20:35,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:35,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 938 [2020-10-27 01:20:35,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:35,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:20:35,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:35,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 01:20:35,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:36,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:36,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:36,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:36,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:36,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:36,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:20:36,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:36,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:36,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:36,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:36,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:36,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26688599] [2020-10-27 01:20:36,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:36,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:20:36,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322235545] [2020-10-27 01:20:36,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:20:36,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:36,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:20:36,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:20:36,866 INFO L87 Difference]: Start difference. First operand 109 states and 114 transitions. Second operand 22 states. [2020-10-27 01:20:37,853 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-10-27 01:20:38,020 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2020-10-27 01:20:38,673 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2020-10-27 01:20:39,044 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-27 01:20:39,283 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 83 [2020-10-27 01:20:40,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:40,090 INFO L93 Difference]: Finished difference Result 139 states and 145 transitions. [2020-10-27 01:20:40,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:20:40,091 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 57 [2020-10-27 01:20:40,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:40,092 INFO L225 Difference]: With dead ends: 139 [2020-10-27 01:20:40,092 INFO L226 Difference]: Without dead ends: 133 [2020-10-27 01:20:40,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=203, Invalid=1959, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:20:40,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-27 01:20:40,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 119. [2020-10-27 01:20:40,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-27 01:20:40,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 125 transitions. [2020-10-27 01:20:40,104 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 125 transitions. Word has length 57 [2020-10-27 01:20:40,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:40,104 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 125 transitions. [2020-10-27 01:20:40,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:20:40,105 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 125 transitions. [2020-10-27 01:20:40,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 01:20:40,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:40,105 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:40,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:20:40,106 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:40,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:40,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1955258514, now seen corresponding path program 16 times [2020-10-27 01:20:40,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:40,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237766376] [2020-10-27 01:20:40,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:40,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:40,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:42,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:42,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:20:42,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:42,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1900 [2020-10-27 01:20:42,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:42,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:20:42,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:42,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 01:20:42,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:42,732 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-10-27 01:20:43,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:43,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:43,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:43,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:43,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:43,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:20:43,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:43,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:43,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:43,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:43,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:43,356 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:43,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237766376] [2020-10-27 01:20:43,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:43,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:20:43,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713696060] [2020-10-27 01:20:43,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:20:43,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:43,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:20:43,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:20:43,358 INFO L87 Difference]: Start difference. First operand 119 states and 125 transitions. Second operand 22 states. [2020-10-27 01:20:44,135 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 67 [2020-10-27 01:20:45,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:45,072 INFO L93 Difference]: Finished difference Result 153 states and 160 transitions. [2020-10-27 01:20:45,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:20:45,072 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 59 [2020-10-27 01:20:45,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:45,074 INFO L225 Difference]: With dead ends: 153 [2020-10-27 01:20:45,074 INFO L226 Difference]: Without dead ends: 147 [2020-10-27 01:20:45,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:20:45,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-27 01:20:45,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 123. [2020-10-27 01:20:45,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-27 01:20:45,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 129 transitions. [2020-10-27 01:20:45,089 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 129 transitions. Word has length 59 [2020-10-27 01:20:45,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:45,089 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 129 transitions. [2020-10-27 01:20:45,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:20:45,090 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 129 transitions. [2020-10-27 01:20:45,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 01:20:45,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:45,090 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:45,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:20:45,091 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:45,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:45,091 INFO L82 PathProgramCache]: Analyzing trace with hash 763493133, now seen corresponding path program 17 times [2020-10-27 01:20:45,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:45,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405629434] [2020-10-27 01:20:45,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:45,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:45,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:46,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:46,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 01:20:46,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:46,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1310 [2020-10-27 01:20:46,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:46,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:20:46,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:46,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 01:20:46,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:47,097 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-27 01:20:47,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:47,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:47,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:47,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:47,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:47,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:47,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:20:47,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:47,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:47,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:47,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:47,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:47,781 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:47,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405629434] [2020-10-27 01:20:47,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:47,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:20:47,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538529620] [2020-10-27 01:20:47,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:20:47,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:47,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:20:47,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:20:47,783 INFO L87 Difference]: Start difference. First operand 123 states and 129 transitions. Second operand 22 states. [2020-10-27 01:20:48,631 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-27 01:20:49,038 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2020-10-27 01:20:49,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:49,957 INFO L93 Difference]: Finished difference Result 155 states and 161 transitions. [2020-10-27 01:20:49,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:20:49,957 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2020-10-27 01:20:49,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:49,959 INFO L225 Difference]: With dead ends: 155 [2020-10-27 01:20:49,959 INFO L226 Difference]: Without dead ends: 133 [2020-10-27 01:20:49,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:20:49,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-27 01:20:49,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 117. [2020-10-27 01:20:49,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 01:20:49,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 122 transitions. [2020-10-27 01:20:49,970 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 122 transitions. Word has length 61 [2020-10-27 01:20:49,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:49,971 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 122 transitions. [2020-10-27 01:20:49,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:20:49,971 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 122 transitions. [2020-10-27 01:20:49,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 01:20:49,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:49,972 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:49,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:20:49,972 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:49,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:49,972 INFO L82 PathProgramCache]: Analyzing trace with hash -274771448, now seen corresponding path program 12 times [2020-10-27 01:20:49,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:49,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495901623] [2020-10-27 01:20:49,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:50,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:51,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:51,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 01:20:51,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:51,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1387 [2020-10-27 01:20:51,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:51,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:20:51,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:51,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 01:20:51,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:52,123 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2020-10-27 01:20:52,269 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-27 01:20:52,442 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-27 01:20:52,599 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-10-27 01:20:53,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:53,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:53,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:53,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:53,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:53,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:53,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:20:53,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:53,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:53,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:53,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:53,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:53,171 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:53,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495901623] [2020-10-27 01:20:53,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:53,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:20:53,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487189865] [2020-10-27 01:20:53,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:20:53,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:53,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:20:53,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:20:53,175 INFO L87 Difference]: Start difference. First operand 117 states and 122 transitions. Second operand 22 states. [2020-10-27 01:20:53,672 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-27 01:20:54,047 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-27 01:20:54,471 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 72 [2020-10-27 01:20:55,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:55,333 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2020-10-27 01:20:55,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:20:55,334 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2020-10-27 01:20:55,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:55,335 INFO L225 Difference]: With dead ends: 141 [2020-10-27 01:20:55,335 INFO L226 Difference]: Without dead ends: 119 [2020-10-27 01:20:55,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:20:55,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-27 01:20:55,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2020-10-27 01:20:55,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-27 01:20:55,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2020-10-27 01:20:55,346 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 61 [2020-10-27 01:20:55,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:55,346 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2020-10-27 01:20:55,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:20:55,346 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2020-10-27 01:20:55,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 01:20:55,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:55,347 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:55,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:20:55,347 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:55,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:55,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1067091764, now seen corresponding path program 18 times [2020-10-27 01:20:55,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:55,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681947992] [2020-10-27 01:20:55,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:55,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:56,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:56,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 01:20:56,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:56,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1431 [2020-10-27 01:20:56,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:56,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:20:56,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:56,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 01:20:56,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:57,454 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-10-27 01:20:57,698 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2020-10-27 01:20:58,106 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 79 [2020-10-27 01:20:58,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:58,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:58,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:58,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:58,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:58,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:58,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:20:58,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:58,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:58,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:58,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:58,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:20:58,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681947992] [2020-10-27 01:20:58,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:58,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:20:58,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113822826] [2020-10-27 01:20:58,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:20:58,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:58,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:20:58,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:20:58,806 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand 24 states. [2020-10-27 01:20:59,945 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-10-27 01:21:01,155 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-27 01:21:01,684 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 93 [2020-10-27 01:21:02,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:21:02,370 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2020-10-27 01:21:02,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 01:21:02,370 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 63 [2020-10-27 01:21:02,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:21:02,372 INFO L225 Difference]: With dead ends: 139 [2020-10-27 01:21:02,372 INFO L226 Difference]: Without dead ends: 133 [2020-10-27 01:21:02,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=252, Invalid=2610, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 01:21:02,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-27 01:21:02,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 121. [2020-10-27 01:21:02,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 01:21:02,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2020-10-27 01:21:02,385 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 63 [2020-10-27 01:21:02,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:21:02,386 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2020-10-27 01:21:02,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:21:02,386 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2020-10-27 01:21:02,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 01:21:02,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:02,386 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:21:02,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:21:02,387 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:02,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:02,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1153532919, now seen corresponding path program 13 times [2020-10-27 01:21:02,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:02,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077132627] [2020-10-27 01:21:02,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:02,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:02,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:03,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:03,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 01:21:03,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:03,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1256 [2020-10-27 01:21:03,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:03,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:21:03,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:21:03,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 01:21:03,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:04,607 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2020-10-27 01:21:04,778 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2020-10-27 01:21:05,133 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 75 [2020-10-27 01:21:05,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:21:05,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:05,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:05,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:05,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:21:05,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:05,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:21:05,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:05,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:05,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:05,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:05,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:21:05,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077132627] [2020-10-27 01:21:05,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:21:05,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:21:05,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919178422] [2020-10-27 01:21:05,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:21:05,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:21:05,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:21:05,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:21:05,874 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand 24 states. [2020-10-27 01:21:07,960 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2020-10-27 01:21:08,204 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2020-10-27 01:21:08,903 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 94 [2020-10-27 01:21:09,221 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 88 [2020-10-27 01:21:09,496 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2020-10-27 01:21:10,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:21:10,298 INFO L93 Difference]: Finished difference Result 151 states and 157 transitions. [2020-10-27 01:21:10,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 01:21:10,299 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 63 [2020-10-27 01:21:10,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:21:10,300 INFO L225 Difference]: With dead ends: 151 [2020-10-27 01:21:10,300 INFO L226 Difference]: Without dead ends: 145 [2020-10-27 01:21:10,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=240, Invalid=2516, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:21:10,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-27 01:21:10,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 131. [2020-10-27 01:21:10,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-27 01:21:10,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 137 transitions. [2020-10-27 01:21:10,316 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 137 transitions. Word has length 63 [2020-10-27 01:21:10,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:21:10,317 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 137 transitions. [2020-10-27 01:21:10,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:21:10,317 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 137 transitions. [2020-10-27 01:21:10,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 01:21:10,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:10,318 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:21:10,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:21:10,318 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:10,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:10,318 INFO L82 PathProgramCache]: Analyzing trace with hash -317231929, now seen corresponding path program 19 times [2020-10-27 01:21:10,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:10,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907381436] [2020-10-27 01:21:10,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:10,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:12,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:12,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 01:21:12,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:12,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2256 [2020-10-27 01:21:12,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:12,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 01:21:12,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:21:12,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 01:21:12,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:13,256 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-27 01:21:13,496 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-27 01:21:13,666 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-10-27 01:21:13,867 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2020-10-27 01:21:14,055 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2020-10-27 01:21:14,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:21:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:14,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:14,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:14,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:21:14,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:14,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:21:14,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:14,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:14,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:14,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:14,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:14,638 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:21:14,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907381436] [2020-10-27 01:21:14,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:21:14,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:21:14,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751129157] [2020-10-27 01:21:14,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:21:14,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:21:14,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:21:14,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:21:14,640 INFO L87 Difference]: Start difference. First operand 131 states and 137 transitions. Second operand 25 states. [2020-10-27 01:21:16,232 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 82 [2020-10-27 01:21:17,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:21:17,131 INFO L93 Difference]: Finished difference Result 153 states and 159 transitions. [2020-10-27 01:21:17,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:21:17,132 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 65 [2020-10-27 01:21:17,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:21:17,133 INFO L225 Difference]: With dead ends: 153 [2020-10-27 01:21:17,133 INFO L226 Difference]: Without dead ends: 147 [2020-10-27 01:21:17,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=188, Invalid=1792, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:21:17,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-27 01:21:17,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 133. [2020-10-27 01:21:17,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-27 01:21:17,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 139 transitions. [2020-10-27 01:21:17,151 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 139 transitions. Word has length 65 [2020-10-27 01:21:17,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:21:17,151 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 139 transitions. [2020-10-27 01:21:17,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:21:17,151 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 139 transitions. [2020-10-27 01:21:17,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 01:21:17,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:17,152 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:21:17,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:21:17,153 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:17,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:17,153 INFO L82 PathProgramCache]: Analyzing trace with hash -925712668, now seen corresponding path program 14 times [2020-10-27 01:21:17,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:17,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001746658] [2020-10-27 01:21:17,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:17,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:17,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:18,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:18,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 01:21:18,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:18,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1482 [2020-10-27 01:21:18,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:18,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 01:21:18,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:21:18,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 01:21:18,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:19,250 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-27 01:21:19,500 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-10-27 01:21:19,667 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-10-27 01:21:19,844 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2020-10-27 01:21:20,017 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2020-10-27 01:21:20,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:21:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:20,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:20,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:20,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:21:20,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:20,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:21:20,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:20,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:20,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:20,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:20,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:21:20,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001746658] [2020-10-27 01:21:20,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:21:20,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:21:20,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465723485] [2020-10-27 01:21:20,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:21:20,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:21:20,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:21:20,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:21:20,568 INFO L87 Difference]: Start difference. First operand 133 states and 139 transitions. Second operand 25 states. [2020-10-27 01:21:22,347 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 83 [2020-10-27 01:21:23,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:21:23,220 INFO L93 Difference]: Finished difference Result 155 states and 161 transitions. [2020-10-27 01:21:23,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:21:23,221 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 65 [2020-10-27 01:21:23,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:21:23,222 INFO L225 Difference]: With dead ends: 155 [2020-10-27 01:21:23,223 INFO L226 Difference]: Without dead ends: 149 [2020-10-27 01:21:23,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=188, Invalid=1792, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:21:23,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-27 01:21:23,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 135. [2020-10-27 01:21:23,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-27 01:21:23,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 141 transitions. [2020-10-27 01:21:23,240 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 141 transitions. Word has length 65 [2020-10-27 01:21:23,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:21:23,240 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 141 transitions. [2020-10-27 01:21:23,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:21:23,240 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 141 transitions. [2020-10-27 01:21:23,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 01:21:23,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:23,241 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:21:23,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:21:23,241 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:23,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:23,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1256436222, now seen corresponding path program 20 times [2020-10-27 01:21:23,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:23,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974603583] [2020-10-27 01:21:23,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:23,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:25,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:25,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 01:21:25,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:25,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1922 [2020-10-27 01:21:25,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:25,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:21:25,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:21:25,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 01:21:25,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:25,751 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-27 01:21:26,061 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-27 01:21:26,201 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-27 01:21:26,423 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2020-10-27 01:21:26,588 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-10-27 01:21:26,740 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2020-10-27 01:21:27,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:21:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:27,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:27,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:27,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:21:27,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:27,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:21:27,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:27,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:27,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:27,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:27,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:27,421 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:21:27,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974603583] [2020-10-27 01:21:27,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:21:27,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:21:27,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441522302] [2020-10-27 01:21:27,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:21:27,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:21:27,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:21:27,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:21:27,423 INFO L87 Difference]: Start difference. First operand 135 states and 141 transitions. Second operand 25 states. [2020-10-27 01:21:28,358 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 78 [2020-10-27 01:21:29,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:21:29,519 INFO L93 Difference]: Finished difference Result 169 states and 176 transitions. [2020-10-27 01:21:29,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:21:29,520 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 67 [2020-10-27 01:21:29,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:21:29,521 INFO L225 Difference]: With dead ends: 169 [2020-10-27 01:21:29,521 INFO L226 Difference]: Without dead ends: 163 [2020-10-27 01:21:29,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=107, Invalid=1083, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:21:29,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-27 01:21:29,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 139. [2020-10-27 01:21:29,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-27 01:21:29,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 145 transitions. [2020-10-27 01:21:29,541 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 145 transitions. Word has length 67 [2020-10-27 01:21:29,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:21:29,542 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 145 transitions. [2020-10-27 01:21:29,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:21:29,542 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 145 transitions. [2020-10-27 01:21:29,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 01:21:29,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:29,543 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:21:29,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:21:29,543 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:29,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:29,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1888629635, now seen corresponding path program 21 times [2020-10-27 01:21:29,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:29,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353750270] [2020-10-27 01:21:29,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:29,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:29,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:31,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:31,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 01:21:31,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:31,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1629 [2020-10-27 01:21:31,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:31,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:21:31,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:21:31,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 01:21:31,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:31,657 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-10-27 01:21:32,073 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-27 01:21:32,418 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2020-10-27 01:21:32,574 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-10-27 01:21:32,729 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-10-27 01:21:33,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:21:33,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:33,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:33,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:33,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:21:33,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:33,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:21:33,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:33,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:33,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:33,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:33,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:33,516 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 14 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:21:33,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353750270] [2020-10-27 01:21:33,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:21:33,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:21:33,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545373943] [2020-10-27 01:21:33,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:21:33,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:21:33,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:21:33,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:21:33,518 INFO L87 Difference]: Start difference. First operand 139 states and 145 transitions. Second operand 25 states. [2020-10-27 01:21:34,219 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-10-27 01:21:34,665 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 67 [2020-10-27 01:21:35,166 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 79 [2020-10-27 01:21:35,382 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-27 01:21:35,693 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 83 [2020-10-27 01:21:37,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:21:37,114 INFO L93 Difference]: Finished difference Result 171 states and 177 transitions. [2020-10-27 01:21:37,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:21:37,115 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 69 [2020-10-27 01:21:37,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:21:37,117 INFO L225 Difference]: With dead ends: 171 [2020-10-27 01:21:37,117 INFO L226 Difference]: Without dead ends: 147 [2020-10-27 01:21:37,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=132, Invalid=1590, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:21:37,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-27 01:21:37,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 131. [2020-10-27 01:21:37,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-27 01:21:37,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 136 transitions. [2020-10-27 01:21:37,134 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 136 transitions. Word has length 69 [2020-10-27 01:21:37,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:21:37,134 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 136 transitions. [2020-10-27 01:21:37,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:21:37,134 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 136 transitions. [2020-10-27 01:21:37,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 01:21:37,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:37,135 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:21:37,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:21:37,135 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:37,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:37,136 INFO L82 PathProgramCache]: Analyzing trace with hash -893984127, now seen corresponding path program 22 times [2020-10-27 01:21:37,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:37,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201440166] [2020-10-27 01:21:37,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:37,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:37,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:39,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:39,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 01:21:39,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:39,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1883 [2020-10-27 01:21:39,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:39,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 01:21:39,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:21:39,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 01:21:39,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:39,808 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-10-27 01:21:40,107 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-10-27 01:21:40,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:21:40,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:40,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:40,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:40,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:21:40,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:40,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:21:40,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:40,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:40,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:40,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:40,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:40,928 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:21:40,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201440166] [2020-10-27 01:21:40,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:21:40,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:21:40,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695223417] [2020-10-27 01:21:40,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:21:40,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:21:40,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:21:40,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:21:40,930 INFO L87 Difference]: Start difference. First operand 131 states and 136 transitions. Second operand 25 states. [2020-10-27 01:21:41,768 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-10-27 01:21:41,921 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-10-27 01:21:42,357 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-27 01:21:42,518 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-27 01:21:43,097 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 78 [2020-10-27 01:21:43,350 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-27 01:21:43,594 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-10-27 01:21:44,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:21:44,207 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2020-10-27 01:21:44,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:21:44,208 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 69 [2020-10-27 01:21:44,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:21:44,209 INFO L225 Difference]: With dead ends: 141 [2020-10-27 01:21:44,210 INFO L226 Difference]: Without dead ends: 135 [2020-10-27 01:21:44,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=210, Invalid=2046, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 01:21:44,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-27 01:21:44,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2020-10-27 01:21:44,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-27 01:21:44,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 138 transitions. [2020-10-27 01:21:44,227 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 138 transitions. Word has length 69 [2020-10-27 01:21:44,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:21:44,228 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 138 transitions. [2020-10-27 01:21:44,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:21:44,228 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 138 transitions. [2020-10-27 01:21:44,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 01:21:44,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:44,229 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:21:44,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:21:44,229 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:44,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:44,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1810688934, now seen corresponding path program 15 times [2020-10-27 01:21:44,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:44,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879125443] [2020-10-27 01:21:44,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:44,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:45,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:45,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 01:21:45,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:45,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1458 [2020-10-27 01:21:45,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:45,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:21:45,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:21:45,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 01:21:45,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:46,579 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-27 01:21:46,950 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2020-10-27 01:21:47,104 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-10-27 01:21:47,256 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-10-27 01:21:47,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:21:47,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:47,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:47,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:47,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:21:47,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:47,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:21:47,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:47,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:47,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:47,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:47,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:48,009 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 14 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:21:48,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879125443] [2020-10-27 01:21:48,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:21:48,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:21:48,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432059490] [2020-10-27 01:21:48,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:21:48,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:21:48,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:21:48,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:21:48,011 INFO L87 Difference]: Start difference. First operand 133 states and 138 transitions. Second operand 25 states. [2020-10-27 01:21:48,658 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-10-27 01:21:49,094 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 67 [2020-10-27 01:21:49,608 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 79 [2020-10-27 01:21:49,828 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-27 01:21:50,147 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 83 [2020-10-27 01:21:51,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:21:51,287 INFO L93 Difference]: Finished difference Result 157 states and 162 transitions. [2020-10-27 01:21:51,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:21:51,287 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 69 [2020-10-27 01:21:51,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:21:51,288 INFO L225 Difference]: With dead ends: 157 [2020-10-27 01:21:51,288 INFO L226 Difference]: Without dead ends: 133 [2020-10-27 01:21:51,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=132, Invalid=1590, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:21:51,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-27 01:21:51,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 125. [2020-10-27 01:21:51,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-27 01:21:51,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2020-10-27 01:21:51,302 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 69 [2020-10-27 01:21:51,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:21:51,302 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2020-10-27 01:21:51,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:21:51,302 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2020-10-27 01:21:51,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 01:21:51,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:51,303 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:21:51,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:21:51,303 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:51,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:51,304 INFO L82 PathProgramCache]: Analyzing trace with hash -419725504, now seen corresponding path program 16 times [2020-10-27 01:21:51,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:51,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213275606] [2020-10-27 01:21:51,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:51,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:51,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:52,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:52,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 01:21:52,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:52,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1569 [2020-10-27 01:21:52,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:52,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 01:21:52,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:21:52,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 01:21:52,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:53,508 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-27 01:21:53,789 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-10-27 01:21:54,136 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-27 01:21:54,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:21:54,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:54,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:54,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:54,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:21:54,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:54,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:21:54,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:54,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:54,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:54,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:54,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 22 [2020-10-27 01:21:54,993 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:21:54,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213275606] [2020-10-27 01:21:54,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:21:54,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:21:54,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910501788] [2020-10-27 01:21:54,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:21:54,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:21:54,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:21:54,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:21:54,995 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand 25 states. [2020-10-27 01:21:55,948 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-10-27 01:21:56,128 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2020-10-27 01:21:56,578 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-27 01:21:56,743 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-27 01:21:57,323 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 79 [2020-10-27 01:21:57,585 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-27 01:21:57,824 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-10-27 01:21:58,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:21:58,477 INFO L93 Difference]: Finished difference Result 133 states and 137 transitions. [2020-10-27 01:21:58,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:21:58,478 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 69 [2020-10-27 01:21:58,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:21:58,479 INFO L225 Difference]: With dead ends: 133 [2020-10-27 01:21:58,479 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 01:21:58,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=210, Invalid=2046, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 01:21:58,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 01:21:58,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-10-27 01:21:58,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-27 01:21:58,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2020-10-27 01:21:58,492 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 69 [2020-10-27 01:21:58,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:21:58,493 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2020-10-27 01:21:58,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:21:58,493 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2020-10-27 01:21:58,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 01:21:58,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:58,493 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:21:58,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:21:58,494 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:58,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:58,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1464517316, now seen corresponding path program 23 times [2020-10-27 01:21:58,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:58,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903921821] [2020-10-27 01:21:58,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:58,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:58,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:00,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:00,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 01:22:00,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:00,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1907 [2020-10-27 01:22:00,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:00,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 01:22:00,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:22:00,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 01:22:00,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:01,079 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-27 01:22:01,280 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-10-27 01:22:01,636 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2020-10-27 01:22:02,062 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 90 [2020-10-27 01:22:02,245 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-27 01:22:02,533 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-27 01:22:03,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:22:03,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:03,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:03,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:03,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:22:03,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:03,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:22:03,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:03,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:22:03,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:03,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:22:03,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:22:03,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903921821] [2020-10-27 01:22:03,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:22:03,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:22:03,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755124763] [2020-10-27 01:22:03,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:22:03,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:22:03,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:22:03,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:22:03,217 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand 27 states. [2020-10-27 01:22:04,024 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-27 01:22:04,699 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-27 01:22:04,864 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-27 01:22:05,434 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-27 01:22:05,603 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 01:22:05,957 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-27 01:22:06,246 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-10-27 01:22:06,541 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 96 [2020-10-27 01:22:06,837 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 99 [2020-10-27 01:22:07,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:22:07,564 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2020-10-27 01:22:07,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:22:07,565 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 71 [2020-10-27 01:22:07,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:22:07,566 INFO L225 Difference]: With dead ends: 135 [2020-10-27 01:22:07,566 INFO L226 Difference]: Without dead ends: 129 [2020-10-27 01:22:07,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=237, Invalid=2625, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 01:22:07,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-27 01:22:07,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2020-10-27 01:22:07,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-27 01:22:07,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2020-10-27 01:22:07,580 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 71 [2020-10-27 01:22:07,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:22:07,580 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2020-10-27 01:22:07,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:22:07,580 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2020-10-27 01:22:07,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 01:22:07,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:22:07,581 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:22:07,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:22:07,581 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:22:07,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:22:07,582 INFO L82 PathProgramCache]: Analyzing trace with hash -111423397, now seen corresponding path program 17 times [2020-10-27 01:22:07,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:22:07,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491356229] [2020-10-27 01:22:07,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:22:07,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:07,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:09,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:09,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 01:22:09,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:09,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1969 [2020-10-27 01:22:09,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:09,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 01:22:09,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:22:09,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 01:22:09,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:10,098 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-27 01:22:10,227 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-27 01:22:10,416 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-10-27 01:22:10,729 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2020-10-27 01:22:11,156 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2020-10-27 01:22:11,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:22:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:11,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:11,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:11,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:22:11,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:11,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:22:11,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:11,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:22:11,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:11,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:22:11,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:12,013 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:22:12,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491356229] [2020-10-27 01:22:12,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:22:12,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:22:12,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305147032] [2020-10-27 01:22:12,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:22:12,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:22:12,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:22:12,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:22:12,015 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand 27 states. [2020-10-27 01:22:13,028 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2020-10-27 01:22:13,603 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-27 01:22:13,793 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 01:22:14,425 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 01:22:14,644 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-27 01:22:14,854 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-27 01:22:15,101 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-27 01:22:15,391 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-10-27 01:22:15,745 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 97 [2020-10-27 01:22:16,062 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 100 [2020-10-27 01:22:16,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:22:16,842 INFO L93 Difference]: Finished difference Result 137 states and 141 transitions. [2020-10-27 01:22:16,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:22:16,843 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 71 [2020-10-27 01:22:16,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:22:16,845 INFO L225 Difference]: With dead ends: 137 [2020-10-27 01:22:16,846 INFO L226 Difference]: Without dead ends: 131 [2020-10-27 01:22:16,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=237, Invalid=2625, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 01:22:16,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-27 01:22:16,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2020-10-27 01:22:16,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-27 01:22:16,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2020-10-27 01:22:16,865 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 71 [2020-10-27 01:22:16,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:22:16,865 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2020-10-27 01:22:16,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:22:16,865 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2020-10-27 01:22:16,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 01:22:16,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:22:16,866 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:22:16,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 01:22:16,867 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:22:16,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:22:16,867 INFO L82 PathProgramCache]: Analyzing trace with hash 8901943, now seen corresponding path program 24 times [2020-10-27 01:22:16,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:22:16,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346442034] [2020-10-27 01:22:16,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:22:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:17,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:19,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:19,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 01:22:19,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:19,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2262 [2020-10-27 01:22:19,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:19,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 01:22:19,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:22:19,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 01:22:19,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:19,864 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-27 01:22:20,183 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-10-27 01:22:20,475 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2020-10-27 01:22:20,626 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-27 01:22:20,888 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2020-10-27 01:22:21,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:22:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:21,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:21,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:21,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:22:21,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:21,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:22:21,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:21,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:22:21,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:21,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:22:21,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:22:21,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346442034] [2020-10-27 01:22:21,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:22:21,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:22:21,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485020236] [2020-10-27 01:22:21,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:22:21,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:22:21,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:22:21,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:22:21,969 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand 28 states. [2020-10-27 01:22:24,142 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 102 [2020-10-27 01:22:25,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:22:25,195 INFO L93 Difference]: Finished difference Result 167 states and 172 transitions. [2020-10-27 01:22:25,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 01:22:25,196 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 73 [2020-10-27 01:22:25,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:22:25,197 INFO L225 Difference]: With dead ends: 167 [2020-10-27 01:22:25,198 INFO L226 Difference]: Without dead ends: 161 [2020-10-27 01:22:25,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=215, Invalid=2335, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:22:25,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-27 01:22:25,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 141. [2020-10-27 01:22:25,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-27 01:22:25,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 146 transitions. [2020-10-27 01:22:25,212 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 146 transitions. Word has length 73 [2020-10-27 01:22:25,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:22:25,212 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 146 transitions. [2020-10-27 01:22:25,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:22:25,212 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 146 transitions. [2020-10-27 01:22:25,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 01:22:25,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:22:25,213 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:22:25,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 01:22:25,213 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:22:25,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:22:25,214 INFO L82 PathProgramCache]: Analyzing trace with hash -185841994, now seen corresponding path program 18 times [2020-10-27 01:22:25,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:22:25,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374121075] [2020-10-27 01:22:25,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:22:25,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:25,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:27,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:27,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 01:22:27,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:27,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2273 [2020-10-27 01:22:27,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:27,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 01:22:27,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:22:27,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 01:22:27,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:28,014 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-27 01:22:28,222 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-27 01:22:28,490 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-27 01:22:28,761 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-10-27 01:22:28,910 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-27 01:22:29,138 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2020-10-27 01:22:30,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:22:30,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:30,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:30,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:30,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:22:30,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:30,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:22:30,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:30,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:22:30,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:30,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:22:30,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:30,325 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:22:30,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374121075] [2020-10-27 01:22:30,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:22:30,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:22:30,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521167590] [2020-10-27 01:22:30,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:22:30,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:22:30,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:22:30,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:22:30,326 INFO L87 Difference]: Start difference. First operand 141 states and 146 transitions. Second operand 28 states. [2020-10-27 01:22:32,919 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 103 [2020-10-27 01:22:34,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:22:34,032 INFO L93 Difference]: Finished difference Result 175 states and 181 transitions. [2020-10-27 01:22:34,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 01:22:34,033 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 73 [2020-10-27 01:22:34,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:22:34,035 INFO L225 Difference]: With dead ends: 175 [2020-10-27 01:22:34,035 INFO L226 Difference]: Without dead ends: 169 [2020-10-27 01:22:34,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=215, Invalid=2335, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:22:34,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-27 01:22:34,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 151. [2020-10-27 01:22:34,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-27 01:22:34,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 157 transitions. [2020-10-27 01:22:34,051 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 157 transitions. Word has length 73 [2020-10-27 01:22:34,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:22:34,051 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 157 transitions. [2020-10-27 01:22:34,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:22:34,052 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 157 transitions. [2020-10-27 01:22:34,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 01:22:34,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:22:34,053 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:22:34,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 01:22:34,053 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:22:34,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:22:34,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1374397838, now seen corresponding path program 25 times [2020-10-27 01:22:34,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:22:34,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566090558] [2020-10-27 01:22:34,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:22:34,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:34,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:36,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:36,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 01:22:36,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:36,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2103 [2020-10-27 01:22:36,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:36,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:22:36,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:22:36,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 01:22:36,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:36,916 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-10-27 01:22:37,112 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-27 01:22:37,374 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2020-10-27 01:22:37,516 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-27 01:22:37,847 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-10-27 01:22:38,059 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-10-27 01:22:38,472 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-27 01:22:38,949 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 85 [2020-10-27 01:22:39,420 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-10-27 01:22:40,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:22:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:40,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:40,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:40,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:22:40,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:40,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:22:40,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:40,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:22:40,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:40,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:22:40,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:22:40,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566090558] [2020-10-27 01:22:40,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:22:40,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:22:40,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348042025] [2020-10-27 01:22:40,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:22:40,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:22:40,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:22:40,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=697, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:22:40,468 INFO L87 Difference]: Start difference. First operand 151 states and 157 transitions. Second operand 28 states. [2020-10-27 01:22:41,976 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-27 01:22:42,189 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-27 01:22:42,602 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-27 01:22:42,881 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-27 01:22:43,389 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-27 01:22:43,762 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-10-27 01:22:44,564 WARN L193 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 112 [2020-10-27 01:22:44,943 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-10-27 01:22:46,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:22:46,440 INFO L93 Difference]: Finished difference Result 193 states and 200 transitions. [2020-10-27 01:22:46,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:22:46,441 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 75 [2020-10-27 01:22:46,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:22:46,442 INFO L225 Difference]: With dead ends: 193 [2020-10-27 01:22:46,443 INFO L226 Difference]: Without dead ends: 187 [2020-10-27 01:22:46,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=173, Invalid=2479, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 01:22:46,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-27 01:22:46,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 155. [2020-10-27 01:22:46,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-27 01:22:46,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 161 transitions. [2020-10-27 01:22:46,466 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 161 transitions. Word has length 75 [2020-10-27 01:22:46,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:22:46,466 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 161 transitions. [2020-10-27 01:22:46,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:22:46,466 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 161 transitions. [2020-10-27 01:22:46,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 01:22:46,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:22:46,467 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:22:46,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 01:22:46,467 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:22:46,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:22:46,468 INFO L82 PathProgramCache]: Analyzing trace with hash 714374381, now seen corresponding path program 26 times [2020-10-27 01:22:46,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:22:46,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647202565] [2020-10-27 01:22:46,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:22:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:46,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:48,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:48,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 01:22:48,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:48,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2074 [2020-10-27 01:22:48,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:48,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:22:48,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:22:48,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 01:22:48,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:49,134 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-10-27 01:22:49,315 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-27 01:22:49,586 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-10-27 01:22:49,924 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-10-27 01:22:50,070 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-27 01:22:50,324 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2020-10-27 01:22:50,508 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2020-10-27 01:22:50,756 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2020-10-27 01:22:51,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:22:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:51,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:51,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:51,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:22:51,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:51,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:22:51,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:51,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:22:51,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:22:51,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:22:51,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:51,848 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:22:51,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647202565] [2020-10-27 01:22:51,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:22:51,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:22:51,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296888898] [2020-10-27 01:22:51,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:22:51,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:22:51,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:22:51,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=695, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:22:51,850 INFO L87 Difference]: Start difference. First operand 155 states and 161 transitions. Second operand 28 states. [2020-10-27 01:22:53,060 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-27 01:22:53,266 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-27 01:22:53,573 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-27 01:22:53,791 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 01:22:54,138 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-27 01:22:54,372 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-27 01:22:54,763 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 93 [2020-10-27 01:22:56,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:22:56,342 INFO L93 Difference]: Finished difference Result 195 states and 201 transitions. [2020-10-27 01:22:56,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:22:56,343 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 77 [2020-10-27 01:22:56,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:22:56,344 INFO L225 Difference]: With dead ends: 195 [2020-10-27 01:22:56,345 INFO L226 Difference]: Without dead ends: 169 [2020-10-27 01:22:56,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=159, Invalid=2193, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:22:56,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-27 01:22:56,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 149. [2020-10-27 01:22:56,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-27 01:22:56,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 154 transitions. [2020-10-27 01:22:56,366 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 154 transitions. Word has length 77 [2020-10-27 01:22:56,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:22:56,366 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 154 transitions. [2020-10-27 01:22:56,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:22:56,367 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 154 transitions. [2020-10-27 01:22:56,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 01:22:56,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:22:56,367 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:22:56,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 01:22:56,368 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:22:56,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:22:56,368 INFO L82 PathProgramCache]: Analyzing trace with hash -2053086420, now seen corresponding path program 19 times [2020-10-27 01:22:56,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:22:56,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845518228] [2020-10-27 01:22:56,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:22:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:22:56,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:22:58,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:22:58,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 01:22:58,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:22:58,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2414 [2020-10-27 01:22:58,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:22:58,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:22:58,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:22:58,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 01:22:58,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:22:59,569 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-10-27 01:22:59,877 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-10-27 01:23:00,021 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-27 01:23:00,268 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-10-27 01:23:00,414 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-27 01:23:00,664 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 82 [2020-10-27 01:23:00,854 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-10-27 01:23:01,095 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2020-10-27 01:23:02,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:23:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:23:02,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:23:02,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:23:02,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:23:02,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:23:02,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:23:02,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:23:02,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:23:02,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:23:02,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:23:02,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:23:02,184 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:23:02,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845518228] [2020-10-27 01:23:02,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:23:02,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:23:02,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145717210] [2020-10-27 01:23:02,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:23:02,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:23:02,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:23:02,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=695, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:23:02,186 INFO L87 Difference]: Start difference. First operand 149 states and 154 transitions. Second operand 28 states. [2020-10-27 01:23:03,413 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-27 01:23:03,619 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-27 01:23:03,950 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-27 01:23:04,172 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 01:23:04,535 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-27 01:23:04,784 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-27 01:23:05,194 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 93 [2020-10-27 01:23:06,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:23:06,479 INFO L93 Difference]: Finished difference Result 177 states and 182 transitions. [2020-10-27 01:23:06,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:23:06,480 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 77 [2020-10-27 01:23:06,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:23:06,481 INFO L225 Difference]: With dead ends: 177 [2020-10-27 01:23:06,482 INFO L226 Difference]: Without dead ends: 151 [2020-10-27 01:23:06,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=159, Invalid=2193, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:23:06,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-27 01:23:06,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 143. [2020-10-27 01:23:06,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-27 01:23:06,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 147 transitions. [2020-10-27 01:23:06,499 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 147 transitions. Word has length 77 [2020-10-27 01:23:06,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:23:06,499 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 147 transitions. [2020-10-27 01:23:06,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:23:06,500 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 147 transitions. [2020-10-27 01:23:06,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 01:23:06,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:23:06,500 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:23:06,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 01:23:06,501 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:23:06,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:23:06,501 INFO L82 PathProgramCache]: Analyzing trace with hash 748445868, now seen corresponding path program 27 times [2020-10-27 01:23:06,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:23:06,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941952519] [2020-10-27 01:23:06,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:23:06,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:23:06,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking...