/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:40:17,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:40:17,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:40:17,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:40:17,456 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:40:17,463 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:40:17,465 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:40:17,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:40:17,473 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:40:17,481 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:40:17,482 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:40:17,484 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:40:17,484 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:40:17,487 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:40:17,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:40:17,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:40:17,493 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:40:17,497 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:40:17,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:40:17,513 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:40:17,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:40:17,517 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:40:17,519 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:40:17,521 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:40:17,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:40:17,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:40:17,532 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:40:17,533 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:40:17,534 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:40:17,537 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:40:17,537 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:40:17,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:40:17,540 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:40:17,540 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:40:17,541 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:40:17,542 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:40:17,542 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:40:17,543 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:40:17,543 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:40:17,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:40:17,545 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:40:17,553 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 14:40:17,605 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:40:17,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:40:17,611 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:40:17,611 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:40:17,611 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:40:17,612 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:40:17,612 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:40:17,612 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:40:17,612 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:40:17,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:40:17,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:40:17,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:40:17,614 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:40:17,614 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:40:17,614 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:40:17,615 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:40:17,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:40:17,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:40:17,615 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:40:17,615 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:40:17,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:40:17,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:40:17,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:40:17,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:40:17,617 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:40:17,617 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:40:17,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:40:17,617 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:40:17,617 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:40:17,617 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:40:18,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:40:18,055 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:40:18,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:40:18,059 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:40:18,060 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:40:18,061 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-2.i [2020-10-28 14:40:18,155 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d164a2d5d/bf8d35ec932a40cb89129692e1a67a94/FLAG3f1c58529 [2020-10-28 14:40:18,970 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:40:18,971 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-2.i [2020-10-28 14:40:18,995 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d164a2d5d/bf8d35ec932a40cb89129692e1a67a94/FLAG3f1c58529 [2020-10-28 14:40:19,267 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d164a2d5d/bf8d35ec932a40cb89129692e1a67a94 [2020-10-28 14:40:19,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:40:19,281 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:40:19,286 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:40:19,287 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:40:19,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:40:19,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:40:19" (1/1) ... [2020-10-28 14:40:19,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a0090e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:19, skipping insertion in model container [2020-10-28 14:40:19,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:40:19" (1/1) ... [2020-10-28 14:40:19,307 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:40:19,379 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:40:19,848 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:40:19,866 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:40:19,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:40:20,021 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:40:20,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:20 WrapperNode [2020-10-28 14:40:20,022 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:40:20,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:40:20,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:40:20,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:40:20,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:20" (1/1) ... [2020-10-28 14:40:20,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:20" (1/1) ... [2020-10-28 14:40:20,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:20" (1/1) ... [2020-10-28 14:40:20,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:20" (1/1) ... [2020-10-28 14:40:20,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:20" (1/1) ... [2020-10-28 14:40:20,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:20" (1/1) ... [2020-10-28 14:40:20,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:20" (1/1) ... [2020-10-28 14:40:20,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:40:20,112 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:40:20,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:40:20,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:40:20,114 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:20" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:40:20,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:40:20,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:40:20,196 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:40:20,196 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-28 14:40:20,197 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-28 14:40:20,197 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-28 14:40:20,197 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:40:20,197 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:40:20,197 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:40:20,198 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:40:20,198 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:40:20,198 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:40:20,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:40:20,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:40:20,198 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-28 14:40:20,199 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-28 14:40:20,199 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-28 14:40:20,199 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-28 14:40:20,199 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-28 14:40:20,199 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-28 14:40:20,200 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-28 14:40:20,200 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-28 14:40:20,200 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-28 14:40:20,200 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-28 14:40:20,201 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-28 14:40:20,201 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-28 14:40:20,201 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-28 14:40:20,201 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-28 14:40:20,201 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-28 14:40:20,202 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-28 14:40:20,202 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-28 14:40:20,202 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-28 14:40:20,202 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-28 14:40:20,202 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-28 14:40:20,203 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-28 14:40:20,203 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-28 14:40:20,203 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-28 14:40:20,203 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-28 14:40:20,203 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-28 14:40:20,204 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-28 14:40:20,204 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-28 14:40:20,204 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-28 14:40:20,204 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-28 14:40:20,204 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-28 14:40:20,205 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-28 14:40:20,205 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-28 14:40:20,205 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-28 14:40:20,205 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-28 14:40:20,206 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-28 14:40:20,206 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-28 14:40:20,206 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-28 14:40:20,206 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-28 14:40:20,206 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-28 14:40:20,207 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-28 14:40:20,207 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-28 14:40:20,207 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-28 14:40:20,207 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-28 14:40:20,207 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-28 14:40:20,207 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-28 14:40:20,208 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-28 14:40:20,208 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-28 14:40:20,208 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-28 14:40:20,208 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-28 14:40:20,208 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-28 14:40:20,208 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-28 14:40:20,209 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-28 14:40:20,209 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 14:40:20,209 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 14:40:20,209 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-28 14:40:20,209 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 14:40:20,210 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-28 14:40:20,210 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-28 14:40:20,210 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-28 14:40:20,210 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-28 14:40:20,210 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-28 14:40:20,210 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-28 14:40:20,211 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-28 14:40:20,211 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-28 14:40:20,211 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:40:20,211 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-28 14:40:20,211 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-28 14:40:20,211 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-28 14:40:20,212 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-28 14:40:20,212 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-28 14:40:20,212 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-28 14:40:20,212 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-28 14:40:20,212 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-28 14:40:20,212 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-28 14:40:20,213 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-28 14:40:20,213 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-28 14:40:20,213 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-28 14:40:20,213 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-28 14:40:20,213 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-28 14:40:20,213 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-28 14:40:20,213 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-28 14:40:20,214 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-28 14:40:20,214 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-28 14:40:20,214 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-28 14:40:20,214 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-28 14:40:20,214 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-28 14:40:20,214 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-28 14:40:20,215 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-28 14:40:20,215 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-28 14:40:20,215 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-28 14:40:20,215 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-28 14:40:20,215 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-28 14:40:20,215 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-28 14:40:20,216 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-28 14:40:20,216 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-28 14:40:20,216 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-28 14:40:20,216 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-28 14:40:20,216 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-28 14:40:20,216 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-28 14:40:20,216 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-28 14:40:20,217 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-28 14:40:20,217 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-28 14:40:20,217 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-28 14:40:20,217 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-28 14:40:20,217 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-28 14:40:20,217 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:40:20,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 14:40:20,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:40:20,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:40:20,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:40:20,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:40:20,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:40:20,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:40:20,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:40:20,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:40:20,825 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-28 14:40:21,174 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:40:21,175 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-28 14:40:21,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:40:21 BoogieIcfgContainer [2020-10-28 14:40:21,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:40:21,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:40:21,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:40:21,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:40:21,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:40:19" (1/3) ... [2020-10-28 14:40:21,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79626ec0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:40:21, skipping insertion in model container [2020-10-28 14:40:21,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:20" (2/3) ... [2020-10-28 14:40:21,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79626ec0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:40:21, skipping insertion in model container [2020-10-28 14:40:21,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:40:21" (3/3) ... [2020-10-28 14:40:21,187 INFO L111 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-2.i [2020-10-28 14:40:21,202 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:40:21,207 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:40:21,222 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:40:21,251 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:40:21,252 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:40:21,252 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:40:21,252 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:40:21,252 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:40:21,252 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:40:21,252 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:40:21,253 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:40:21,272 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2020-10-28 14:40:21,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:40:21,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:21,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:21,281 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:21,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:21,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1723059971, now seen corresponding path program 1 times [2020-10-28 14:40:21,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:21,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915071239] [2020-10-28 14:40:21,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:21,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:21,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:21,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:21,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:21,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:21,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:21,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:21,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:22,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:22,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:40:22,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 14:40:22,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 596 [2020-10-28 14:40:22,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:22,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:22,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:22,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:40:22,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:22,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:40:22,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:22,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:22,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:22,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:22,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:22,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:22,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:40:22,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:22,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:22,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:22,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:22,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:22,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:40:22,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:40:22,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915071239] [2020-10-28 14:40:22,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:40:22,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:40:22,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096333572] [2020-10-28 14:40:22,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:40:22,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:22,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:40:22,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:40:22,188 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 3 states. [2020-10-28 14:40:22,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:22,484 INFO L93 Difference]: Finished difference Result 115 states and 176 transitions. [2020-10-28 14:40:22,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:40:22,486 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-28 14:40:22,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:22,494 INFO L225 Difference]: With dead ends: 115 [2020-10-28 14:40:22,495 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 14:40:22,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:40:22,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 14:40:22,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-28 14:40:22,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 14:40:22,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2020-10-28 14:40:22,544 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 22 [2020-10-28 14:40:22,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:22,545 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2020-10-28 14:40:22,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:40:22,545 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2020-10-28 14:40:22,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:40:22,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:22,547 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:22,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:40:22,547 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:22,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:22,548 INFO L82 PathProgramCache]: Analyzing trace with hash 80260039, now seen corresponding path program 1 times [2020-10-28 14:40:22,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:22,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135362666] [2020-10-28 14:40:22,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:22,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:22,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:22,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:22,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:22,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:40:22,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:40:22,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-28 14:40:22,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:22,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:22,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:40:22,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:40:22,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:40:22,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:40:22,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:22,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:22,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:22,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:22,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:22,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:22,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:40:22,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:22,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:22,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:22,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:22,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:22,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:40:22,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:40:22,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135362666] [2020-10-28 14:40:22,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:40:22,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:40:22,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789906140] [2020-10-28 14:40:22,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:40:22,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:22,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:40:22,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:40:22,897 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand 4 states. [2020-10-28 14:40:23,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:23,156 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2020-10-28 14:40:23,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:40:23,157 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-28 14:40:23,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:23,160 INFO L225 Difference]: With dead ends: 79 [2020-10-28 14:40:23,160 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 14:40:23,161 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 [2020-10-28 14:40:23,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 14:40:23,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-28 14:40:23,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 14:40:23,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2020-10-28 14:40:23,173 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 27 [2020-10-28 14:40:23,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:23,173 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2020-10-28 14:40:23,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:40:23,173 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2020-10-28 14:40:23,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 14:40:23,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:23,175 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:23,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:40:23,176 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:23,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:23,176 INFO L82 PathProgramCache]: Analyzing trace with hash 510744340, now seen corresponding path program 1 times [2020-10-28 14:40:23,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:23,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445741172] [2020-10-28 14:40:23,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:23,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:23,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:23,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:23,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:23,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:23,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:40:23,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:40:23,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 519 [2020-10-28 14:40:23,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:23,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:23,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:40:23,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 14:40:23,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:40:23,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:40:23,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:23,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:23,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:23,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:23,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:23,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:23,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:40:23,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:23,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:23,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:23,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:23,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:23,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:40:23,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:40:23,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445741172] [2020-10-28 14:40:23,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:40:23,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:40:23,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188436123] [2020-10-28 14:40:23,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:40:23,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:23,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:40:23,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:40:23,817 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand 4 states. [2020-10-28 14:40:24,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:24,093 INFO L93 Difference]: Finished difference Result 97 states and 135 transitions. [2020-10-28 14:40:24,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:40:24,094 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-28 14:40:24,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:24,095 INFO L225 Difference]: With dead ends: 97 [2020-10-28 14:40:24,095 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 14:40:24,099 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 [2020-10-28 14:40:24,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 14:40:24,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-28 14:40:24,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 14:40:24,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 81 transitions. [2020-10-28 14:40:24,115 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 81 transitions. Word has length 33 [2020-10-28 14:40:24,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:24,115 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 81 transitions. [2020-10-28 14:40:24,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:40:24,115 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 81 transitions. [2020-10-28 14:40:24,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 14:40:24,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:24,120 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:24,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:40:24,120 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:24,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:24,121 INFO L82 PathProgramCache]: Analyzing trace with hash 729599058, now seen corresponding path program 1 times [2020-10-28 14:40:24,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:24,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327374125] [2020-10-28 14:40:24,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:24,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:24,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:24,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:40:24,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:24,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-28 14:40:24,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:24,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:24,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:40:24,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 14:40:24,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:40:24,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:40:24,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:24,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:24,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:24,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:24,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:24,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:24,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:40:24,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:24,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:24,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:24,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:24,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:24,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:40:24,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:40:24,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327374125] [2020-10-28 14:40:24,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:40:24,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:40:24,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364504688] [2020-10-28 14:40:24,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:40:24,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:24,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:40:24,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:40:24,396 INFO L87 Difference]: Start difference. First operand 59 states and 81 transitions. Second operand 6 states. [2020-10-28 14:40:24,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:24,737 INFO L93 Difference]: Finished difference Result 85 states and 112 transitions. [2020-10-28 14:40:24,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:40:24,738 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-10-28 14:40:24,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:24,741 INFO L225 Difference]: With dead ends: 85 [2020-10-28 14:40:24,741 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 14:40:24,742 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 [2020-10-28 14:40:24,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 14:40:24,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-10-28 14:40:24,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 14:40:24,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 93 transitions. [2020-10-28 14:40:24,752 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 93 transitions. Word has length 33 [2020-10-28 14:40:24,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:24,752 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 93 transitions. [2020-10-28 14:40:24,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:40:24,752 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 93 transitions. [2020-10-28 14:40:24,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:40:24,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:24,754 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:24,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:40:24,754 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:24,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:24,755 INFO L82 PathProgramCache]: Analyzing trace with hash 585622541, now seen corresponding path program 1 times [2020-10-28 14:40:24,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:24,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556462690] [2020-10-28 14:40:24,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:24,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:24,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:24,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:40:24,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:24,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-28 14:40:24,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:24,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:24,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:40:24,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 14:40:24,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:40:24,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:24,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:24,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:24,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:24,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:24,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:24,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:24,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:40:24,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:24,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:24,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:24,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:24,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:24,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:24,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:40:24,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556462690] [2020-10-28 14:40:24,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:40:24,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:40:24,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574657221] [2020-10-28 14:40:25,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:40:25,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:25,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:40:25,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:40:25,001 INFO L87 Difference]: Start difference. First operand 68 states and 93 transitions. Second operand 6 states. [2020-10-28 14:40:25,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:25,336 INFO L93 Difference]: Finished difference Result 87 states and 114 transitions. [2020-10-28 14:40:25,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:40:25,337 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-28 14:40:25,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:25,338 INFO L225 Difference]: With dead ends: 87 [2020-10-28 14:40:25,338 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 14:40:25,339 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 [2020-10-28 14:40:25,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 14:40:25,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 66. [2020-10-28 14:40:25,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-28 14:40:25,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 90 transitions. [2020-10-28 14:40:25,347 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 90 transitions. Word has length 35 [2020-10-28 14:40:25,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:25,347 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 90 transitions. [2020-10-28 14:40:25,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:40:25,348 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 90 transitions. [2020-10-28 14:40:25,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:40:25,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:25,349 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:25,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:40:25,349 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:25,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:25,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1777671693, now seen corresponding path program 1 times [2020-10-28 14:40:25,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:25,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540884678] [2020-10-28 14:40:25,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:25,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:25,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:25,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:40:25,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:25,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-28 14:40:25,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:25,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:25,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:40:25,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 14:40:25,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:40:25,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:25,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:25,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:25,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:25,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:25,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:25,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:25,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:40:25,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:25,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:25,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:25,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:25,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:25,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:40:25,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:40:25,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540884678] [2020-10-28 14:40:25,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:40:25,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:40:25,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876682654] [2020-10-28 14:40:25,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:40:25,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:25,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:40:25,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:40:25,577 INFO L87 Difference]: Start difference. First operand 66 states and 90 transitions. Second operand 6 states. [2020-10-28 14:40:25,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:25,991 INFO L93 Difference]: Finished difference Result 87 states and 114 transitions. [2020-10-28 14:40:25,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:40:25,992 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-28 14:40:25,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:25,993 INFO L225 Difference]: With dead ends: 87 [2020-10-28 14:40:25,993 INFO L226 Difference]: Without dead ends: 74 [2020-10-28 14:40:25,994 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 [2020-10-28 14:40:25,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-28 14:40:26,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-10-28 14:40:26,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-28 14:40:26,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 86 transitions. [2020-10-28 14:40:26,002 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 86 transitions. Word has length 35 [2020-10-28 14:40:26,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:26,002 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 86 transitions. [2020-10-28 14:40:26,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:40:26,002 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 86 transitions. [2020-10-28 14:40:26,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:40:26,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:26,004 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:26,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:40:26,005 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:26,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:26,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1980453703, now seen corresponding path program 1 times [2020-10-28 14:40:26,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:26,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649671439] [2020-10-28 14:40:26,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:26,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:26,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:26,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:26,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:40:26,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:40:26,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 420 [2020-10-28 14:40:26,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:26,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:26,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:40:26,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:40:26,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:40:26,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:40:26,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:26,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:26,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:26,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:26,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:26,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:26,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:40:26,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:26,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:26,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:26,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:26,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:26,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:40:26,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649671439] [2020-10-28 14:40:26,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:26,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:40:26,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970135327] [2020-10-28 14:40:26,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:40:26,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:26,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:40:26,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:40:26,705 INFO L87 Difference]: Start difference. First operand 63 states and 86 transitions. Second operand 9 states. [2020-10-28 14:40:27,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:27,363 INFO L93 Difference]: Finished difference Result 89 states and 116 transitions. [2020-10-28 14:40:27,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:40:27,364 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-28 14:40:27,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:27,367 INFO L225 Difference]: With dead ends: 89 [2020-10-28 14:40:27,367 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 14:40:27,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:40:27,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 14:40:27,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2020-10-28 14:40:27,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 14:40:27,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 97 transitions. [2020-10-28 14:40:27,376 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 97 transitions. Word has length 37 [2020-10-28 14:40:27,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:27,382 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 97 transitions. [2020-10-28 14:40:27,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:40:27,382 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 97 transitions. [2020-10-28 14:40:27,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:40:27,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:27,387 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:27,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:40:27,387 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:27,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:27,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1180142727, now seen corresponding path program 1 times [2020-10-28 14:40:27,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:27,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636575447] [2020-10-28 14:40:27,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:27,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:27,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:27,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:27,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:40:27,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:40:27,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 522 [2020-10-28 14:40:27,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:27,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:27,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:40:27,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 14:40:27,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:40:27,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:40:28,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:28,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:28,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:28,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:28,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:28,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:40:28,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:28,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:28,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:28,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:28,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:28,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:40:28,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:40:28,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636575447] [2020-10-28 14:40:28,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:28,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:40:28,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971450446] [2020-10-28 14:40:28,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:40:28,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:28,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:40:28,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:40:28,182 INFO L87 Difference]: Start difference. First operand 72 states and 97 transitions. Second operand 10 states. [2020-10-28 14:40:28,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:28,886 INFO L93 Difference]: Finished difference Result 98 states and 128 transitions. [2020-10-28 14:40:28,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:40:28,887 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-28 14:40:28,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:28,888 INFO L225 Difference]: With dead ends: 98 [2020-10-28 14:40:28,888 INFO L226 Difference]: Without dead ends: 92 [2020-10-28 14:40:28,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:40:28,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-28 14:40:28,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 76. [2020-10-28 14:40:28,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 14:40:28,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 102 transitions. [2020-10-28 14:40:28,910 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 102 transitions. Word has length 37 [2020-10-28 14:40:28,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:28,912 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 102 transitions. [2020-10-28 14:40:28,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:40:28,913 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 102 transitions. [2020-10-28 14:40:28,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:40:28,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:28,914 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:28,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:40:28,914 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:28,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:28,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1024899404, now seen corresponding path program 1 times [2020-10-28 14:40:28,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:28,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000301779] [2020-10-28 14:40:28,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:28,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:28,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:29,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:29,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:40:29,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:29,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-10-28 14:40:29,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:29,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:29,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:40:29,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:40:29,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:40:29,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:40:29,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:29,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:29,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:29,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:29,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:29,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:29,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:40:29,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:29,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:29,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:29,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:29,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:29,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:40:29,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:40:29,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000301779] [2020-10-28 14:40:29,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:29,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:40:29,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980002208] [2020-10-28 14:40:29,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:40:29,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:29,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:40:29,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:40:29,584 INFO L87 Difference]: Start difference. First operand 76 states and 102 transitions. Second operand 10 states. [2020-10-28 14:40:30,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:30,484 INFO L93 Difference]: Finished difference Result 97 states and 126 transitions. [2020-10-28 14:40:30,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:40:30,484 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-28 14:40:30,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:30,485 INFO L225 Difference]: With dead ends: 97 [2020-10-28 14:40:30,485 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 14:40:30,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:40:30,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 14:40:30,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-28 14:40:30,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 14:40:30,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 107 transitions. [2020-10-28 14:40:30,496 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 107 transitions. Word has length 39 [2020-10-28 14:40:30,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:30,497 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 107 transitions. [2020-10-28 14:40:30,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:40:30,498 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 107 transitions. [2020-10-28 14:40:30,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:40:30,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:30,501 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:30,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:40:30,502 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:30,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:30,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1860219409, now seen corresponding path program 2 times [2020-10-28 14:40:30,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:30,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690639392] [2020-10-28 14:40:30,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:30,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:30,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:30,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:30,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:40:30,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:30,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-28 14:40:30,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:30,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:30,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:40:30,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:40:30,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:40:30,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:30,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:30,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:30,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:30,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:30,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:30,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:40:30,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:30,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:30,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:30,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:30,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:30,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:31,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:40:31,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690639392] [2020-10-28 14:40:31,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:31,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:40:31,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913375715] [2020-10-28 14:40:31,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:40:31,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:31,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:40:31,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:40:31,004 INFO L87 Difference]: Start difference. First operand 80 states and 107 transitions. Second operand 10 states. [2020-10-28 14:40:31,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:31,780 INFO L93 Difference]: Finished difference Result 99 states and 128 transitions. [2020-10-28 14:40:31,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:40:31,781 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-28 14:40:31,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:31,782 INFO L225 Difference]: With dead ends: 99 [2020-10-28 14:40:31,782 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 14:40:31,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:40:31,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 14:40:31,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-10-28 14:40:31,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 14:40:31,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 101 transitions. [2020-10-28 14:40:31,798 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 101 transitions. Word has length 41 [2020-10-28 14:40:31,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:31,799 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 101 transitions. [2020-10-28 14:40:31,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:40:31,799 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 101 transitions. [2020-10-28 14:40:31,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:40:31,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:31,800 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:31,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:40:31,804 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:31,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:31,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1865203217, now seen corresponding path program 1 times [2020-10-28 14:40:31,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:31,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835858718] [2020-10-28 14:40:31,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:31,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:31,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:31,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:32,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:32,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:40:32,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:40:32,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 430 [2020-10-28 14:40:32,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:32,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:32,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:40:32,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:40:32,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:40:32,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:32,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:32,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:32,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:32,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:32,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:32,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:32,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:40:32,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:32,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:32,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:32,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:32,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:32,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:40:32,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835858718] [2020-10-28 14:40:32,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:32,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:40:32,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129424909] [2020-10-28 14:40:32,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:40:32,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:32,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:40:32,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:40:32,508 INFO L87 Difference]: Start difference. First operand 76 states and 101 transitions. Second operand 10 states. [2020-10-28 14:40:33,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:33,200 INFO L93 Difference]: Finished difference Result 97 states and 125 transitions. [2020-10-28 14:40:33,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:40:33,201 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-28 14:40:33,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:33,202 INFO L225 Difference]: With dead ends: 97 [2020-10-28 14:40:33,202 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 14:40:33,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:40:33,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 14:40:33,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 71. [2020-10-28 14:40:33,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-28 14:40:33,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2020-10-28 14:40:33,208 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 41 [2020-10-28 14:40:33,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:33,208 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2020-10-28 14:40:33,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:40:33,208 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2020-10-28 14:40:33,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:40:33,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:33,209 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:33,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:40:33,210 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:33,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:33,210 INFO L82 PathProgramCache]: Analyzing trace with hash 791151008, now seen corresponding path program 2 times [2020-10-28 14:40:33,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:33,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211527147] [2020-10-28 14:40:33,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:33,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:33,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:33,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:33,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:40:33,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:33,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-28 14:40:33,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:33,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:33,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:40:33,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:40:33,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:40:33,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:33,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:33,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:33,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:33,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:33,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:33,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:33,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:40:33,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:33,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:33,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:33,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:33,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:33,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:33,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:40:33,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211527147] [2020-10-28 14:40:33,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:33,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:40:33,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486117450] [2020-10-28 14:40:33,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:40:33,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:33,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:40:33,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:40:33,687 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand 11 states. [2020-10-28 14:40:34,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:34,278 INFO L93 Difference]: Finished difference Result 95 states and 123 transitions. [2020-10-28 14:40:34,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:40:34,279 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-10-28 14:40:34,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:34,280 INFO L225 Difference]: With dead ends: 95 [2020-10-28 14:40:34,280 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 14:40:34,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:40:34,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 14:40:34,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2020-10-28 14:40:34,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 14:40:34,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 108 transitions. [2020-10-28 14:40:34,286 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 108 transitions. Word has length 41 [2020-10-28 14:40:34,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:34,286 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 108 transitions. [2020-10-28 14:40:34,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:40:34,286 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 108 transitions. [2020-10-28 14:40:34,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:40:34,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:34,287 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:34,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:40:34,288 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:34,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:34,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1041918048, now seen corresponding path program 1 times [2020-10-28 14:40:34,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:34,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311268680] [2020-10-28 14:40:34,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:34,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:34,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:34,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:34,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:40:34,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:34,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 228 [2020-10-28 14:40:34,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:34,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:34,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:40:34,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:40:34,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:40:34,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:35,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:35,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:35,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:35,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:35,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:35,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:40:35,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:35,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:35,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:35,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:35,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:35,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:40:35,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311268680] [2020-10-28 14:40:35,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:35,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:40:35,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310079142] [2020-10-28 14:40:35,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:40:35,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:35,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:40:35,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:40:35,090 INFO L87 Difference]: Start difference. First operand 82 states and 108 transitions. Second operand 11 states. [2020-10-28 14:40:35,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:35,763 INFO L93 Difference]: Finished difference Result 92 states and 119 transitions. [2020-10-28 14:40:35,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:40:35,764 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-10-28 14:40:35,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:35,765 INFO L225 Difference]: With dead ends: 92 [2020-10-28 14:40:35,766 INFO L226 Difference]: Without dead ends: 84 [2020-10-28 14:40:35,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:40:35,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-28 14:40:35,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-28 14:40:35,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 14:40:35,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 110 transitions. [2020-10-28 14:40:35,773 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 110 transitions. Word has length 41 [2020-10-28 14:40:35,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:35,774 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 110 transitions. [2020-10-28 14:40:35,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:40:35,774 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 110 transitions. [2020-10-28 14:40:35,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 14:40:35,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:35,775 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:35,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:40:35,775 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:35,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:35,776 INFO L82 PathProgramCache]: Analyzing trace with hash -392495653, now seen corresponding path program 3 times [2020-10-28 14:40:35,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:35,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645328039] [2020-10-28 14:40:35,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:35,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:35,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:36,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:36,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:40:36,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:36,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 440 [2020-10-28 14:40:36,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:36,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:36,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:40:36,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:40:36,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:40:36,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:40:36,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:36,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:36,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:36,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:36,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:36,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:40:36,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:36,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:36,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:36,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:36,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:36,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:36,797 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:40:36,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645328039] [2020-10-28 14:40:36,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:36,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:40:36,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885927239] [2020-10-28 14:40:36,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:40:36,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:36,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:40:36,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:40:36,800 INFO L87 Difference]: Start difference. First operand 84 states and 110 transitions. Second operand 12 states. [2020-10-28 14:40:37,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:37,897 INFO L93 Difference]: Finished difference Result 116 states and 146 transitions. [2020-10-28 14:40:37,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:40:37,898 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-28 14:40:37,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:37,899 INFO L225 Difference]: With dead ends: 116 [2020-10-28 14:40:37,901 INFO L226 Difference]: Without dead ends: 110 [2020-10-28 14:40:37,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:40:37,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-28 14:40:37,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2020-10-28 14:40:37,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-28 14:40:37,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 129 transitions. [2020-10-28 14:40:37,909 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 129 transitions. Word has length 43 [2020-10-28 14:40:37,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:37,910 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 129 transitions. [2020-10-28 14:40:37,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:40:37,910 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 129 transitions. [2020-10-28 14:40:37,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 14:40:37,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:37,911 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:37,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:40:37,911 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:37,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:37,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1568212315, now seen corresponding path program 1 times [2020-10-28 14:40:37,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:37,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973459371] [2020-10-28 14:40:37,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:37,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:38,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:38,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:40:38,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:38,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 404 [2020-10-28 14:40:38,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:38,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:38,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:40:38,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:40:38,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:40:38,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:38,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:38,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:38,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:38,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:38,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:38,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:38,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:40:38,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:38,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:38,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:38,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:38,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:38,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:40:38,799 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:40:38,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973459371] [2020-10-28 14:40:38,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:38,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:40:38,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179998972] [2020-10-28 14:40:38,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:40:38,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:38,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:40:38,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:40:38,802 INFO L87 Difference]: Start difference. First operand 100 states and 129 transitions. Second operand 12 states. [2020-10-28 14:40:39,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:39,956 INFO L93 Difference]: Finished difference Result 127 states and 160 transitions. [2020-10-28 14:40:39,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:40:39,957 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-28 14:40:39,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:39,958 INFO L225 Difference]: With dead ends: 127 [2020-10-28 14:40:39,958 INFO L226 Difference]: Without dead ends: 119 [2020-10-28 14:40:39,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:40:39,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-28 14:40:39,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2020-10-28 14:40:39,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-28 14:40:39,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 140 transitions. [2020-10-28 14:40:39,971 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 140 transitions. Word has length 43 [2020-10-28 14:40:39,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:39,972 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 140 transitions. [2020-10-28 14:40:39,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:40:39,972 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 140 transitions. [2020-10-28 14:40:39,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 14:40:39,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:39,973 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:39,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:40:39,973 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:39,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:39,974 INFO L82 PathProgramCache]: Analyzing trace with hash 289396566, now seen corresponding path program 4 times [2020-10-28 14:40:39,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:39,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156571425] [2020-10-28 14:40:39,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:39,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:40,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:40,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:40,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 14:40:40,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:40,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-10-28 14:40:40,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:40,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:40,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:40:40,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:40:40,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:40:40,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:40,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:40,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:40,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:40,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:40,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:40,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:40:40,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:40,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:40,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:40,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:40,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:40,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:40:40,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156571425] [2020-10-28 14:40:40,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:40,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:40:40,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717515260] [2020-10-28 14:40:40,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:40:40,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:40,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:40:40,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:40:40,954 INFO L87 Difference]: Start difference. First operand 109 states and 140 transitions. Second operand 13 states. [2020-10-28 14:40:42,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:42,510 INFO L93 Difference]: Finished difference Result 131 states and 164 transitions. [2020-10-28 14:40:42,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:40:42,512 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-10-28 14:40:42,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:42,513 INFO L225 Difference]: With dead ends: 131 [2020-10-28 14:40:42,513 INFO L226 Difference]: Without dead ends: 125 [2020-10-28 14:40:42,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:40:42,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-28 14:40:42,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2020-10-28 14:40:42,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-28 14:40:42,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 147 transitions. [2020-10-28 14:40:42,522 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 147 transitions. Word has length 45 [2020-10-28 14:40:42,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:42,523 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 147 transitions. [2020-10-28 14:40:42,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:40:42,523 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 147 transitions. [2020-10-28 14:40:42,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:40:42,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:42,524 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:42,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:40:42,524 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:42,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:42,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1542177263, now seen corresponding path program 5 times [2020-10-28 14:40:42,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:42,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771637100] [2020-10-28 14:40:42,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:42,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:42,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:42,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:42,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 14:40:42,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:42,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 414 [2020-10-28 14:40:42,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:42,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:42,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:40:42,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:40:42,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:40:42,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:43,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:43,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:43,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:43,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:43,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:43,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:43,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:40:43,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:43,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:43,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:43,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:43,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:43,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:40:43,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771637100] [2020-10-28 14:40:43,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:43,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:40:43,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750213671] [2020-10-28 14:40:43,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:40:43,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:43,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:40:43,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:40:43,647 INFO L87 Difference]: Start difference. First operand 115 states and 147 transitions. Second operand 13 states. [2020-10-28 14:40:44,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:44,893 INFO L93 Difference]: Finished difference Result 133 states and 166 transitions. [2020-10-28 14:40:44,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:40:44,894 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-10-28 14:40:44,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:44,895 INFO L225 Difference]: With dead ends: 133 [2020-10-28 14:40:44,896 INFO L226 Difference]: Without dead ends: 119 [2020-10-28 14:40:44,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:40:44,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-28 14:40:44,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 101. [2020-10-28 14:40:44,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-28 14:40:44,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 130 transitions. [2020-10-28 14:40:44,904 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 130 transitions. Word has length 47 [2020-10-28 14:40:44,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:44,904 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 130 transitions. [2020-10-28 14:40:44,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:40:44,904 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 130 transitions. [2020-10-28 14:40:44,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:40:44,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:44,905 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:44,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:40:44,905 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:44,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:44,906 INFO L82 PathProgramCache]: Analyzing trace with hash -844600303, now seen corresponding path program 2 times [2020-10-28 14:40:44,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:44,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475969485] [2020-10-28 14:40:44,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:44,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:45,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:45,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:45,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:46,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:47,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:47,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 14:40:47,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:40:47,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2277 [2020-10-28 14:40:47,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:47,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:47,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:40:47,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:40:47,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:40:47,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:47,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:47,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:47,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:47,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:47,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:47,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:40:47,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:47,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:47,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:47,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:47,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:47,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:40:47,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475969485] [2020-10-28 14:40:47,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:47,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:40:47,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159124320] [2020-10-28 14:40:47,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:40:47,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:47,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:40:47,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:40:47,836 INFO L87 Difference]: Start difference. First operand 101 states and 130 transitions. Second operand 13 states. [2020-10-28 14:40:48,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:48,985 INFO L93 Difference]: Finished difference Result 119 states and 149 transitions. [2020-10-28 14:40:48,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:40:48,986 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-10-28 14:40:48,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:48,987 INFO L225 Difference]: With dead ends: 119 [2020-10-28 14:40:48,987 INFO L226 Difference]: Without dead ends: 102 [2020-10-28 14:40:48,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:40:48,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-28 14:40:48,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2020-10-28 14:40:48,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 14:40:48,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2020-10-28 14:40:48,995 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 47 [2020-10-28 14:40:48,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:48,995 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2020-10-28 14:40:48,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:40:48,995 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2020-10-28 14:40:48,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:40:48,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:48,996 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:48,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:40:48,996 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:48,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:48,997 INFO L82 PathProgramCache]: Analyzing trace with hash -490813054, now seen corresponding path program 6 times [2020-10-28 14:40:48,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:48,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701478373] [2020-10-28 14:40:48,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:49,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:49,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:49,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 14:40:49,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:49,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 468 [2020-10-28 14:40:49,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:49,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:49,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:40:49,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:40:49,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:40:49,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:50,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:50,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:50,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:50,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:50,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:50,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:40:50,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:50,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:50,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:50,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:50,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:50,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:40:50,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701478373] [2020-10-28 14:40:50,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:50,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:40:50,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798687756] [2020-10-28 14:40:50,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:40:50,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:50,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:40:50,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:40:50,163 INFO L87 Difference]: Start difference. First operand 96 states and 123 transitions. Second operand 14 states. [2020-10-28 14:40:51,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:51,346 INFO L93 Difference]: Finished difference Result 115 states and 144 transitions. [2020-10-28 14:40:51,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:40:51,347 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-10-28 14:40:51,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:51,349 INFO L225 Difference]: With dead ends: 115 [2020-10-28 14:40:51,349 INFO L226 Difference]: Without dead ends: 109 [2020-10-28 14:40:51,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:40:51,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-28 14:40:51,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-28 14:40:51,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-28 14:40:51,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 138 transitions. [2020-10-28 14:40:51,356 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 138 transitions. Word has length 47 [2020-10-28 14:40:51,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:51,357 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 138 transitions. [2020-10-28 14:40:51,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:40:51,357 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 138 transitions. [2020-10-28 14:40:51,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:40:51,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:51,358 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:51,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:40:51,358 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:51,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:51,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1064964354, now seen corresponding path program 1 times [2020-10-28 14:40:51,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:51,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875330521] [2020-10-28 14:40:51,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:51,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:51,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:51,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:51,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 14:40:51,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:51,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 430 [2020-10-28 14:40:51,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:51,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:51,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:40:51,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:40:51,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:40:51,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:52,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:52,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:52,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:52,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:52,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:52,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:52,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:40:52,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:52,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:52,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:52,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:52,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:52,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:40:52,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875330521] [2020-10-28 14:40:52,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:52,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:40:52,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766685036] [2020-10-28 14:40:52,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:40:52,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:52,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:40:52,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:40:52,348 INFO L87 Difference]: Start difference. First operand 109 states and 138 transitions. Second operand 14 states. [2020-10-28 14:40:53,105 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-10-28 14:40:53,455 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-10-28 14:40:53,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:53,926 INFO L93 Difference]: Finished difference Result 119 states and 149 transitions. [2020-10-28 14:40:53,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:40:53,927 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-10-28 14:40:53,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:53,928 INFO L225 Difference]: With dead ends: 119 [2020-10-28 14:40:53,928 INFO L226 Difference]: Without dead ends: 111 [2020-10-28 14:40:53,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:40:53,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-28 14:40:53,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-10-28 14:40:53,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-28 14:40:53,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 140 transitions. [2020-10-28 14:40:53,936 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 140 transitions. Word has length 47 [2020-10-28 14:40:53,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:53,936 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 140 transitions. [2020-10-28 14:40:53,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:40:53,936 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 140 transitions. [2020-10-28 14:40:53,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 14:40:53,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:53,937 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:53,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:40:53,938 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:53,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:53,938 INFO L82 PathProgramCache]: Analyzing trace with hash 295654717, now seen corresponding path program 7 times [2020-10-28 14:40:53,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:53,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162438424] [2020-10-28 14:40:53,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:54,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:54,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:54,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:40:54,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:54,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 510 [2020-10-28 14:40:54,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:54,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:54,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:40:54,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:40:54,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:40:54,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:54,816 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-10-28 14:40:55,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:55,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:55,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:55,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:55,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:55,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:40:55,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:55,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:55,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:55,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:55,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:55,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:55,304 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:40:55,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162438424] [2020-10-28 14:40:55,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:55,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:40:55,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695307058] [2020-10-28 14:40:55,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:40:55,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:55,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:40:55,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:40:55,309 INFO L87 Difference]: Start difference. First operand 111 states and 140 transitions. Second operand 15 states. [2020-10-28 14:40:56,313 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-28 14:40:57,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:57,077 INFO L93 Difference]: Finished difference Result 158 states and 193 transitions. [2020-10-28 14:40:57,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:40:57,078 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-10-28 14:40:57,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:57,080 INFO L225 Difference]: With dead ends: 158 [2020-10-28 14:40:57,080 INFO L226 Difference]: Without dead ends: 152 [2020-10-28 14:40:57,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:40:57,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-28 14:40:57,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 134. [2020-10-28 14:40:57,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-28 14:40:57,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 167 transitions. [2020-10-28 14:40:57,090 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 167 transitions. Word has length 49 [2020-10-28 14:40:57,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:57,090 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 167 transitions. [2020-10-28 14:40:57,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:40:57,090 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 167 transitions. [2020-10-28 14:40:57,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 14:40:57,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:57,091 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:57,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:40:57,092 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:57,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:57,092 INFO L82 PathProgramCache]: Analyzing trace with hash -2103026307, now seen corresponding path program 2 times [2020-10-28 14:40:57,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:57,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457790798] [2020-10-28 14:40:57,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:57,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:57,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:57,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:57,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:40:57,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:57,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 466 [2020-10-28 14:40:57,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:57,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:57,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:40:57,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:40:57,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:40:57,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:58,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:58,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:58,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:58,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:58,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:58,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:58,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:40:58,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:58,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:58,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:58,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:58,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:58,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:58,265 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:40:58,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457790798] [2020-10-28 14:40:58,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:58,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:40:58,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006310978] [2020-10-28 14:40:58,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:40:58,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:58,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:40:58,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:40:58,267 INFO L87 Difference]: Start difference. First operand 134 states and 167 transitions. Second operand 15 states. [2020-10-28 14:40:59,069 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-10-28 14:40:59,251 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2020-10-28 14:40:59,641 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-28 14:41:00,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:00,478 INFO L93 Difference]: Finished difference Result 165 states and 202 transitions. [2020-10-28 14:41:00,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:41:00,482 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-10-28 14:41:00,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:00,484 INFO L225 Difference]: With dead ends: 165 [2020-10-28 14:41:00,484 INFO L226 Difference]: Without dead ends: 157 [2020-10-28 14:41:00,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:41:00,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-28 14:41:00,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 143. [2020-10-28 14:41:00,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-28 14:41:00,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 178 transitions. [2020-10-28 14:41:00,509 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 178 transitions. Word has length 49 [2020-10-28 14:41:00,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:00,512 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 178 transitions. [2020-10-28 14:41:00,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:41:00,512 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 178 transitions. [2020-10-28 14:41:00,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 14:41:00,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:00,513 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:00,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:41:00,517 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:00,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:00,518 INFO L82 PathProgramCache]: Analyzing trace with hash 176938552, now seen corresponding path program 8 times [2020-10-28 14:41:00,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:00,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114944573] [2020-10-28 14:41:00,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:00,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:00,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:01,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:01,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 14:41:01,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:01,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 622 [2020-10-28 14:41:01,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:01,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:01,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:41:01,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:41:01,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:41:01,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:01,646 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-10-28 14:41:01,798 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2020-10-28 14:41:01,946 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2020-10-28 14:41:02,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:02,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:02,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:02,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:02,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:02,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:02,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:41:02,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:02,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:02,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:02,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:02,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:02,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:41:02,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114944573] [2020-10-28 14:41:02,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:02,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:41:02,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148975625] [2020-10-28 14:41:02,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:41:02,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:02,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:41:02,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:41:02,341 INFO L87 Difference]: Start difference. First operand 143 states and 178 transitions. Second operand 16 states. [2020-10-28 14:41:03,147 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-10-28 14:41:04,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:04,084 INFO L93 Difference]: Finished difference Result 175 states and 213 transitions. [2020-10-28 14:41:04,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:41:04,086 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-10-28 14:41:04,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:04,088 INFO L225 Difference]: With dead ends: 175 [2020-10-28 14:41:04,088 INFO L226 Difference]: Without dead ends: 169 [2020-10-28 14:41:04,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:41:04,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-28 14:41:04,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 151. [2020-10-28 14:41:04,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-28 14:41:04,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 187 transitions. [2020-10-28 14:41:04,100 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 187 transitions. Word has length 51 [2020-10-28 14:41:04,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:04,100 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 187 transitions. [2020-10-28 14:41:04,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:41:04,100 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 187 transitions. [2020-10-28 14:41:04,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 14:41:04,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:04,101 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:04,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:41:04,102 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:04,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:04,102 INFO L82 PathProgramCache]: Analyzing trace with hash 2054820979, now seen corresponding path program 9 times [2020-10-28 14:41:04,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:04,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245443893] [2020-10-28 14:41:04,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:04,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:04,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:04,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:04,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 14:41:04,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:04,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 532 [2020-10-28 14:41:04,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:04,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:04,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:41:04,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:41:04,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:41:04,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:05,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:05,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:05,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:05,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:05,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:05,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:05,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:41:05,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:05,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:05,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:05,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:05,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:05,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:05,573 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:41:05,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245443893] [2020-10-28 14:41:05,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:05,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:41:05,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985323805] [2020-10-28 14:41:05,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:41:05,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:05,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:41:05,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:41:05,575 INFO L87 Difference]: Start difference. First operand 151 states and 187 transitions. Second operand 16 states. [2020-10-28 14:41:06,453 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-10-28 14:41:07,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:07,374 INFO L93 Difference]: Finished difference Result 177 states and 215 transitions. [2020-10-28 14:41:07,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:41:07,376 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-10-28 14:41:07,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:07,378 INFO L225 Difference]: With dead ends: 177 [2020-10-28 14:41:07,379 INFO L226 Difference]: Without dead ends: 161 [2020-10-28 14:41:07,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:41:07,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-28 14:41:07,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 132. [2020-10-28 14:41:07,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-28 14:41:07,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 165 transitions. [2020-10-28 14:41:07,388 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 165 transitions. Word has length 53 [2020-10-28 14:41:07,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:07,388 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 165 transitions. [2020-10-28 14:41:07,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:41:07,388 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 165 transitions. [2020-10-28 14:41:07,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 14:41:07,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:07,389 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:07,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:41:07,390 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:07,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:07,390 INFO L82 PathProgramCache]: Analyzing trace with hash -691536781, now seen corresponding path program 3 times [2020-10-28 14:41:07,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:07,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231863282] [2020-10-28 14:41:07,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:07,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:07,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:07,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:07,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:08,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:08,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:09,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:12,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:12,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 14:41:12,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 14:41:12,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 14:41:12,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:12,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:12,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:41:12,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:41:12,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:41:12,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:12,906 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-10-28 14:41:13,068 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2020-10-28 14:41:13,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:13,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:13,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:13,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:13,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:13,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:13,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:41:13,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:13,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:13,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:13,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:13,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:13,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:41:13,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231863282] [2020-10-28 14:41:13,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:13,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:41:13,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191295345] [2020-10-28 14:41:13,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:41:13,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:13,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:41:13,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:41:13,536 INFO L87 Difference]: Start difference. First operand 132 states and 165 transitions. Second operand 16 states. [2020-10-28 14:41:14,342 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-28 14:41:14,567 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-10-28 14:41:14,839 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-10-28 14:41:15,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:15,697 INFO L93 Difference]: Finished difference Result 154 states and 188 transitions. [2020-10-28 14:41:15,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:41:15,699 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-10-28 14:41:15,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:15,700 INFO L225 Difference]: With dead ends: 154 [2020-10-28 14:41:15,700 INFO L226 Difference]: Without dead ends: 135 [2020-10-28 14:41:15,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:41:15,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-28 14:41:15,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 127. [2020-10-28 14:41:15,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-28 14:41:15,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 157 transitions. [2020-10-28 14:41:15,709 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 157 transitions. Word has length 53 [2020-10-28 14:41:15,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:15,710 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 157 transitions. [2020-10-28 14:41:15,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:41:15,710 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 157 transitions. [2020-10-28 14:41:15,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 14:41:15,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:15,711 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:15,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:41:15,711 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:15,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:15,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1196456028, now seen corresponding path program 10 times [2020-10-28 14:41:15,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:15,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351748901] [2020-10-28 14:41:15,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:15,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:16,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:16,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 14:41:16,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:16,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 614 [2020-10-28 14:41:16,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:16,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:16,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:41:16,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:41:16,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:41:16,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:16,741 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2020-10-28 14:41:16,936 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-28 14:41:17,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:17,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:17,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:17,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:17,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:17,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:17,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:41:17,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:17,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:17,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:17,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:17,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:17,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:17,437 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:41:17,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351748901] [2020-10-28 14:41:17,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:17,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:41:17,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619963823] [2020-10-28 14:41:17,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:41:17,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:17,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:41:17,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:41:17,439 INFO L87 Difference]: Start difference. First operand 127 states and 157 transitions. Second operand 17 states. [2020-10-28 14:41:18,498 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-28 14:41:18,716 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-10-28 14:41:19,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:19,285 INFO L93 Difference]: Finished difference Result 148 states and 180 transitions. [2020-10-28 14:41:19,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:41:19,286 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2020-10-28 14:41:19,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:19,288 INFO L225 Difference]: With dead ends: 148 [2020-10-28 14:41:19,288 INFO L226 Difference]: Without dead ends: 142 [2020-10-28 14:41:19,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:41:19,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-28 14:41:19,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-10-28 14:41:19,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-28 14:41:19,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 174 transitions. [2020-10-28 14:41:19,297 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 174 transitions. Word has length 53 [2020-10-28 14:41:19,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:19,297 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 174 transitions. [2020-10-28 14:41:19,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:41:19,297 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 174 transitions. [2020-10-28 14:41:19,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 14:41:19,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:19,298 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:19,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:41:19,299 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:19,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:19,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1704095716, now seen corresponding path program 2 times [2020-10-28 14:41:19,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:19,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018333154] [2020-10-28 14:41:19,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:19,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:19,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:19,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 14:41:19,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:19,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 548 [2020-10-28 14:41:19,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:19,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:19,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:41:19,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:41:19,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:41:19,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:20,301 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-10-28 14:41:20,496 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-28 14:41:20,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:20,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:20,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:20,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:20,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:20,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:20,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:41:20,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:20,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:20,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:20,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:20,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:20,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:41:21,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018333154] [2020-10-28 14:41:21,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:21,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:41:21,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426068652] [2020-10-28 14:41:21,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:41:21,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:21,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:41:21,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:41:21,014 INFO L87 Difference]: Start difference. First operand 142 states and 174 transitions. Second operand 17 states. [2020-10-28 14:41:22,130 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-10-28 14:41:22,377 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-28 14:41:22,642 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2020-10-28 14:41:23,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:23,280 INFO L93 Difference]: Finished difference Result 152 states and 185 transitions. [2020-10-28 14:41:23,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:41:23,281 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2020-10-28 14:41:23,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:23,283 INFO L225 Difference]: With dead ends: 152 [2020-10-28 14:41:23,283 INFO L226 Difference]: Without dead ends: 144 [2020-10-28 14:41:23,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:41:23,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-28 14:41:23,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-10-28 14:41:23,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-28 14:41:23,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 176 transitions. [2020-10-28 14:41:23,292 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 176 transitions. Word has length 53 [2020-10-28 14:41:23,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:23,292 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 176 transitions. [2020-10-28 14:41:23,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:41:23,292 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 176 transitions. [2020-10-28 14:41:23,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 14:41:23,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:23,293 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:23,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:41:23,294 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:23,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:23,294 INFO L82 PathProgramCache]: Analyzing trace with hash 777589471, now seen corresponding path program 11 times [2020-10-28 14:41:23,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:23,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287348493] [2020-10-28 14:41:23,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:23,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:23,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:23,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 14:41:23,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:23,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 528 [2020-10-28 14:41:23,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:23,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:23,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:41:23,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:41:23,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:41:23,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:24,261 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-10-28 14:41:24,524 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-28 14:41:24,737 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-28 14:41:24,948 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-10-28 14:41:25,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:25,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:25,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:25,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:25,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:25,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:25,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:41:25,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:25,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:25,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:25,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:25,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:25,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:25,474 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:41:25,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287348493] [2020-10-28 14:41:25,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:25,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:41:25,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312423090] [2020-10-28 14:41:25,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:41:25,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:25,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:41:25,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:41:25,476 INFO L87 Difference]: Start difference. First operand 144 states and 176 transitions. Second operand 18 states. [2020-10-28 14:41:26,427 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-28 14:41:26,648 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-10-28 14:41:27,105 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-28 14:41:27,383 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-28 14:41:27,592 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-28 14:41:27,992 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2020-10-28 14:41:29,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:29,088 INFO L93 Difference]: Finished difference Result 208 states and 248 transitions. [2020-10-28 14:41:29,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:41:29,090 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2020-10-28 14:41:29,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:29,092 INFO L225 Difference]: With dead ends: 208 [2020-10-28 14:41:29,092 INFO L226 Difference]: Without dead ends: 202 [2020-10-28 14:41:29,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:41:29,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-28 14:41:29,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 174. [2020-10-28 14:41:29,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-28 14:41:29,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 211 transitions. [2020-10-28 14:41:29,104 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 211 transitions. Word has length 55 [2020-10-28 14:41:29,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:29,104 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 211 transitions. [2020-10-28 14:41:29,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:41:29,105 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 211 transitions. [2020-10-28 14:41:29,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 14:41:29,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:29,106 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:29,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:41:29,106 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:29,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:29,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1859920929, now seen corresponding path program 3 times [2020-10-28 14:41:29,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:29,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023496336] [2020-10-28 14:41:29,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:29,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:29,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:29,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 14:41:29,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:29,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 586 [2020-10-28 14:41:29,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:29,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:29,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:41:29,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:41:29,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:41:29,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:30,108 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-10-28 14:41:30,236 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-10-28 14:41:30,410 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-10-28 14:41:31,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:31,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:31,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:31,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:31,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:31,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:41:31,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:31,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:31,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:31,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:31,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:31,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:31,125 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:41:31,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023496336] [2020-10-28 14:41:31,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:31,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:41:31,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572008222] [2020-10-28 14:41:31,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:41:31,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:31,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:41:31,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:41:31,127 INFO L87 Difference]: Start difference. First operand 174 states and 211 transitions. Second operand 18 states. [2020-10-28 14:41:32,451 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-10-28 14:41:32,720 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-10-28 14:41:32,912 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-10-28 14:41:33,282 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2020-10-28 14:41:34,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:34,406 INFO L93 Difference]: Finished difference Result 209 states and 250 transitions. [2020-10-28 14:41:34,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:41:34,407 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2020-10-28 14:41:34,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:34,409 INFO L225 Difference]: With dead ends: 209 [2020-10-28 14:41:34,409 INFO L226 Difference]: Without dead ends: 201 [2020-10-28 14:41:34,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:41:34,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-28 14:41:34,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 183. [2020-10-28 14:41:34,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-28 14:41:34,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 222 transitions. [2020-10-28 14:41:34,421 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 222 transitions. Word has length 55 [2020-10-28 14:41:34,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:34,421 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 222 transitions. [2020-10-28 14:41:34,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:41:34,422 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 222 transitions. [2020-10-28 14:41:34,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 14:41:34,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:34,423 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:34,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 14:41:34,423 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:34,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:34,423 INFO L82 PathProgramCache]: Analyzing trace with hash -540230822, now seen corresponding path program 12 times [2020-10-28 14:41:34,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:34,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233058076] [2020-10-28 14:41:34,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:34,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:35,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:35,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 14:41:35,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:35,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 927 [2020-10-28 14:41:35,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:35,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:35,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:41:35,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:41:35,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 14:41:35,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:35,872 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-10-28 14:41:36,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:36,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:36,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:36,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:36,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:36,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:36,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:41:36,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:36,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:36,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:36,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:36,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:36,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:36,508 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:41:36,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233058076] [2020-10-28 14:41:36,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:36,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:41:36,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043222133] [2020-10-28 14:41:36,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:41:36,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:36,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:41:36,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:41:36,510 INFO L87 Difference]: Start difference. First operand 183 states and 222 transitions. Second operand 19 states. [2020-10-28 14:41:37,713 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-10-28 14:41:37,958 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-28 14:41:38,305 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-10-28 14:41:39,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:39,664 INFO L93 Difference]: Finished difference Result 227 states and 270 transitions. [2020-10-28 14:41:39,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:41:39,665 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 57 [2020-10-28 14:41:39,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:39,667 INFO L225 Difference]: With dead ends: 227 [2020-10-28 14:41:39,667 INFO L226 Difference]: Without dead ends: 221 [2020-10-28 14:41:39,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:41:39,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-28 14:41:39,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 193. [2020-10-28 14:41:39,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-28 14:41:39,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 233 transitions. [2020-10-28 14:41:39,682 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 233 transitions. Word has length 57 [2020-10-28 14:41:39,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:39,682 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 233 transitions. [2020-10-28 14:41:39,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:41:39,682 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 233 transitions. [2020-10-28 14:41:39,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 14:41:39,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:39,684 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:39,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 14:41:39,684 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:39,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:39,684 INFO L82 PathProgramCache]: Analyzing trace with hash 49819925, now seen corresponding path program 13 times [2020-10-28 14:41:39,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:39,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200521053] [2020-10-28 14:41:39,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:39,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:39,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:40,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:40,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 14:41:40,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:40,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 695 [2020-10-28 14:41:40,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:40,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:40,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:41:40,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:41:40,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:41:40,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:40,790 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-10-28 14:41:40,966 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-10-28 14:41:41,214 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-28 14:41:41,394 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-10-28 14:41:41,562 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-28 14:41:42,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:42,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:42,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:42,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:42,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:42,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:41:42,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:42,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:42,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:42,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:42,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:42,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:42,139 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:41:42,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200521053] [2020-10-28 14:41:42,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:42,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:41:42,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159703064] [2020-10-28 14:41:42,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:41:42,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:42,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:41:42,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:41:42,142 INFO L87 Difference]: Start difference. First operand 193 states and 233 transitions. Second operand 19 states. [2020-10-28 14:41:43,391 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-28 14:41:44,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:44,639 INFO L93 Difference]: Finished difference Result 229 states and 272 transitions. [2020-10-28 14:41:44,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:41:44,640 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 59 [2020-10-28 14:41:44,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:44,642 INFO L225 Difference]: With dead ends: 229 [2020-10-28 14:41:44,642 INFO L226 Difference]: Without dead ends: 211 [2020-10-28 14:41:44,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:41:44,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-28 14:41:44,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 169. [2020-10-28 14:41:44,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-28 14:41:44,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 206 transitions. [2020-10-28 14:41:44,654 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 206 transitions. Word has length 59 [2020-10-28 14:41:44,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:44,654 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 206 transitions. [2020-10-28 14:41:44,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:41:44,655 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 206 transitions. [2020-10-28 14:41:44,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 14:41:44,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:44,656 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:44,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 14:41:44,656 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:44,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:44,656 INFO L82 PathProgramCache]: Analyzing trace with hash -898018539, now seen corresponding path program 4 times [2020-10-28 14:41:44,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:44,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081210345] [2020-10-28 14:41:44,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:44,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:44,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:44,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:45,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:45,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:46,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:46,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:47,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:47,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:49,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:49,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 14:41:49,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 14:41:49,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 14:41:49,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:49,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:49,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:41:49,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:41:49,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:41:49,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:50,086 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-10-28 14:41:50,361 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-28 14:41:50,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:51,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:51,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:51,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:51,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:51,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:41:51,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:51,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:51,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:51,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:51,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:51,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:51,029 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:41:51,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081210345] [2020-10-28 14:41:51,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:51,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:41:51,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624803211] [2020-10-28 14:41:51,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:41:51,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:51,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:41:51,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:41:51,031 INFO L87 Difference]: Start difference. First operand 169 states and 206 transitions. Second operand 19 states. [2020-10-28 14:41:52,317 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-10-28 14:41:52,894 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-10-28 14:41:54,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:54,061 INFO L93 Difference]: Finished difference Result 195 states and 233 transitions. [2020-10-28 14:41:54,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:41:54,063 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 59 [2020-10-28 14:41:54,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:54,064 INFO L225 Difference]: With dead ends: 195 [2020-10-28 14:41:54,064 INFO L226 Difference]: Without dead ends: 174 [2020-10-28 14:41:54,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:41:54,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-28 14:41:54,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 164. [2020-10-28 14:41:54,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-28 14:41:54,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 197 transitions. [2020-10-28 14:41:54,076 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 197 transitions. Word has length 59 [2020-10-28 14:41:54,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:54,076 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 197 transitions. [2020-10-28 14:41:54,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:41:54,077 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 197 transitions. [2020-10-28 14:41:54,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 14:41:54,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:54,078 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:54,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 14:41:54,078 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:54,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:54,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1986159610, now seen corresponding path program 14 times [2020-10-28 14:41:54,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:54,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451315034] [2020-10-28 14:41:54,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:54,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:54,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:54,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 14:41:54,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:54,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 562 [2020-10-28 14:41:54,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:54,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:54,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 14:41:54,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:41:54,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 14:41:54,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:55,023 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-10-28 14:41:55,195 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-10-28 14:41:55,425 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2020-10-28 14:41:55,732 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-10-28 14:41:56,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:56,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:56,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:56,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:56,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:56,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:56,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:41:56,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:56,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:56,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:56,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:56,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:56,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:56,440 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:41:56,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451315034] [2020-10-28 14:41:56,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:56,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:41:56,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286772241] [2020-10-28 14:41:56,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:41:56,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:56,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:41:56,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:41:56,442 INFO L87 Difference]: Start difference. First operand 164 states and 197 transitions. Second operand 20 states. [2020-10-28 14:41:58,037 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2020-10-28 14:41:58,319 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2020-10-28 14:41:59,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:59,095 INFO L93 Difference]: Finished difference Result 187 states and 222 transitions. [2020-10-28 14:41:59,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:41:59,096 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-10-28 14:41:59,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:59,098 INFO L225 Difference]: With dead ends: 187 [2020-10-28 14:41:59,098 INFO L226 Difference]: Without dead ends: 181 [2020-10-28 14:41:59,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:41:59,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-28 14:41:59,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2020-10-28 14:41:59,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-28 14:41:59,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 216 transitions. [2020-10-28 14:41:59,111 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 216 transitions. Word has length 59 [2020-10-28 14:41:59,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:59,111 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 216 transitions. [2020-10-28 14:41:59,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:41:59,112 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 216 transitions. [2020-10-28 14:41:59,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 14:41:59,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:59,113 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:59,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 14:41:59,113 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:59,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:59,114 INFO L82 PathProgramCache]: Analyzing trace with hash -375200506, now seen corresponding path program 3 times [2020-10-28 14:41:59,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:59,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630862916] [2020-10-28 14:41:59,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:59,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:59,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:00,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:00,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 14:42:00,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:00,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 964 [2020-10-28 14:42:00,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:00,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:00,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 14:42:00,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:42:00,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:42:00,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:42:00,515 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-10-28 14:42:00,816 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-10-28 14:42:01,036 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-28 14:42:01,359 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-10-28 14:42:01,612 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-10-28 14:42:01,853 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-28 14:42:02,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:02,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:02,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:02,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:02,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:02,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:02,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:42:02,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:02,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:02,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:02,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:02,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:02,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:02,457 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:42:02,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630862916] [2020-10-28 14:42:02,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:02,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:42:02,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859886888] [2020-10-28 14:42:02,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:42:02,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:02,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:42:02,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:42:02,459 INFO L87 Difference]: Start difference. First operand 181 states and 216 transitions. Second operand 20 states. [2020-10-28 14:42:03,828 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-28 14:42:04,121 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-28 14:42:04,330 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-28 14:42:04,709 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-28 14:42:05,011 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-28 14:42:05,426 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 73 [2020-10-28 14:42:05,778 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2020-10-28 14:42:06,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:06,750 INFO L93 Difference]: Finished difference Result 210 states and 248 transitions. [2020-10-28 14:42:06,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 14:42:06,751 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-10-28 14:42:06,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:06,753 INFO L225 Difference]: With dead ends: 210 [2020-10-28 14:42:06,753 INFO L226 Difference]: Without dead ends: 202 [2020-10-28 14:42:06,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 14:42:06,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-28 14:42:06,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 192. [2020-10-28 14:42:06,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-28 14:42:06,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 229 transitions. [2020-10-28 14:42:06,766 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 229 transitions. Word has length 59 [2020-10-28 14:42:06,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:06,767 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 229 transitions. [2020-10-28 14:42:06,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:42:06,767 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 229 transitions. [2020-10-28 14:42:06,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 14:42:06,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:06,768 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:06,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 14:42:06,768 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:06,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:06,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2081658561, now seen corresponding path program 15 times [2020-10-28 14:42:06,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:06,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049916074] [2020-10-28 14:42:06,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:06,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:07,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:07,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 14:42:07,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:07,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 881 [2020-10-28 14:42:07,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:07,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:07,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 14:42:07,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:42:07,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 14:42:07,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:08,094 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-28 14:42:08,313 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-28 14:42:08,623 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-28 14:42:09,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:09,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:09,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:09,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:09,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:09,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:09,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:42:09,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:09,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:09,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:09,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:09,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:09,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:09,596 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:42:09,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049916074] [2020-10-28 14:42:09,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:09,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 14:42:09,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727593767] [2020-10-28 14:42:09,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 14:42:09,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:09,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 14:42:09,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:42:09,599 INFO L87 Difference]: Start difference. First operand 192 states and 229 transitions. Second operand 21 states. [2020-10-28 14:42:11,081 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-28 14:42:11,395 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2020-10-28 14:42:11,615 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-28 14:42:11,950 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-28 14:42:12,265 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-28 14:42:12,512 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-28 14:42:13,042 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2020-10-28 14:42:14,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:14,564 INFO L93 Difference]: Finished difference Result 273 states and 320 transitions. [2020-10-28 14:42:14,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:42:14,566 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2020-10-28 14:42:14,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:14,568 INFO L225 Difference]: With dead ends: 273 [2020-10-28 14:42:14,569 INFO L226 Difference]: Without dead ends: 267 [2020-10-28 14:42:14,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 14:42:14,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-28 14:42:14,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 227. [2020-10-28 14:42:14,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-28 14:42:14,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 270 transitions. [2020-10-28 14:42:14,586 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 270 transitions. Word has length 61 [2020-10-28 14:42:14,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:14,587 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 270 transitions. [2020-10-28 14:42:14,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 14:42:14,587 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 270 transitions. [2020-10-28 14:42:14,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 14:42:14,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:14,588 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:14,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 14:42:14,589 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:14,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:14,589 INFO L82 PathProgramCache]: Analyzing trace with hash 618193025, now seen corresponding path program 4 times [2020-10-28 14:42:14,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:14,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945511680] [2020-10-28 14:42:14,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:14,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:14,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:15,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:15,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 14:42:15,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:15,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 960 [2020-10-28 14:42:15,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:15,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:15,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 14:42:15,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:42:15,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 14:42:15,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:42:16,081 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-28 14:42:16,214 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2020-10-28 14:42:16,420 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-28 14:42:16,586 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-10-28 14:42:16,830 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-10-28 14:42:17,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:17,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:17,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:17,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:17,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:17,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:42:17,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:17,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:17,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:17,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:17,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:17,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:42:17,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945511680] [2020-10-28 14:42:17,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:17,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 14:42:17,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586958869] [2020-10-28 14:42:17,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 14:42:17,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:17,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 14:42:17,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:42:17,854 INFO L87 Difference]: Start difference. First operand 227 states and 270 transitions. Second operand 21 states. [2020-10-28 14:42:19,177 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-10-28 14:42:19,421 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-10-28 14:42:19,946 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-10-28 14:42:20,280 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-10-28 14:42:20,884 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2020-10-28 14:42:21,277 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2020-10-28 14:42:21,545 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-28 14:42:22,083 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2020-10-28 14:42:23,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:23,683 INFO L93 Difference]: Finished difference Result 257 states and 302 transitions. [2020-10-28 14:42:23,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:42:23,684 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2020-10-28 14:42:23,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:23,686 INFO L225 Difference]: With dead ends: 257 [2020-10-28 14:42:23,687 INFO L226 Difference]: Without dead ends: 249 [2020-10-28 14:42:23,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=157, Invalid=1483, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 14:42:23,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-28 14:42:23,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 229. [2020-10-28 14:42:23,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-28 14:42:23,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 272 transitions. [2020-10-28 14:42:23,705 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 272 transitions. Word has length 61 [2020-10-28 14:42:23,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:23,706 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 272 transitions. [2020-10-28 14:42:23,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 14:42:23,706 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 272 transitions. [2020-10-28 14:42:23,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 14:42:23,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:23,707 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:23,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 14:42:23,707 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:23,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:23,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1460285764, now seen corresponding path program 16 times [2020-10-28 14:42:23,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:23,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145048776] [2020-10-28 14:42:23,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:23,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:23,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:24,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:24,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 14:42:24,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:24,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 876 [2020-10-28 14:42:24,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:24,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:24,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:42:24,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:42:24,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 14:42:24,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:25,070 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-10-28 14:42:25,360 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-10-28 14:42:25,558 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-10-28 14:42:25,862 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-10-28 14:42:26,087 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-28 14:42:26,297 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-10-28 14:42:27,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:27,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:27,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:27,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:27,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:27,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:27,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:42:27,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:27,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:27,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:27,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:27,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:27,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:27,168 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:42:27,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145048776] [2020-10-28 14:42:27,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:27,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 14:42:27,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427116711] [2020-10-28 14:42:27,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 14:42:27,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:27,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 14:42:27,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:42:27,171 INFO L87 Difference]: Start difference. First operand 229 states and 272 transitions. Second operand 22 states. [2020-10-28 14:42:28,861 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-10-28 14:42:30,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:30,549 INFO L93 Difference]: Finished difference Result 285 states and 333 transitions. [2020-10-28 14:42:30,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:42:30,551 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 63 [2020-10-28 14:42:30,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:30,553 INFO L225 Difference]: With dead ends: 285 [2020-10-28 14:42:30,553 INFO L226 Difference]: Without dead ends: 279 [2020-10-28 14:42:30,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:42:30,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-28 14:42:30,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 239. [2020-10-28 14:42:30,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-28 14:42:30,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 283 transitions. [2020-10-28 14:42:30,574 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 283 transitions. Word has length 63 [2020-10-28 14:42:30,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:30,574 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 283 transitions. [2020-10-28 14:42:30,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 14:42:30,575 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 283 transitions. [2020-10-28 14:42:30,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 14:42:30,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:30,576 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:30,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 14:42:30,576 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:30,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:30,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1805320877, now seen corresponding path program 4 times [2020-10-28 14:42:30,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:30,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580053595] [2020-10-28 14:42:30,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:30,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:31,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:31,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 14:42:31,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:31,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1149 [2020-10-28 14:42:31,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:31,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:31,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:42:31,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:42:31,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 14:42:31,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:32,289 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2020-10-28 14:42:32,420 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2020-10-28 14:42:32,613 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-10-28 14:42:32,952 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-28 14:42:33,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:33,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:33,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:33,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:33,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:33,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:42:33,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:33,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:33,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:33,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:33,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:33,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 14:42:33,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580053595] [2020-10-28 14:42:33,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:33,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 14:42:33,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508103346] [2020-10-28 14:42:33,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 14:42:33,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:33,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 14:42:33,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:42:33,859 INFO L87 Difference]: Start difference. First operand 239 states and 283 transitions. Second operand 21 states. [2020-10-28 14:42:35,169 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-10-28 14:42:35,442 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-10-28 14:42:35,639 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-10-28 14:42:35,989 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-28 14:42:36,315 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-28 14:42:36,648 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-28 14:42:37,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:37,505 INFO L93 Difference]: Finished difference Result 263 states and 309 transitions. [2020-10-28 14:42:37,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:42:37,506 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 63 [2020-10-28 14:42:37,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:37,508 INFO L225 Difference]: With dead ends: 263 [2020-10-28 14:42:37,508 INFO L226 Difference]: Without dead ends: 255 [2020-10-28 14:42:37,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 14:42:37,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-28 14:42:37,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 241. [2020-10-28 14:42:37,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-28 14:42:37,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 285 transitions. [2020-10-28 14:42:37,529 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 285 transitions. Word has length 63 [2020-10-28 14:42:37,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:37,530 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 285 transitions. [2020-10-28 14:42:37,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 14:42:37,530 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 285 transitions. [2020-10-28 14:42:37,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 14:42:37,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:37,531 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:37,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 14:42:37,531 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:37,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:37,532 INFO L82 PathProgramCache]: Analyzing trace with hash 640283639, now seen corresponding path program 17 times [2020-10-28 14:42:37,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:37,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618390598] [2020-10-28 14:42:37,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:37,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:38,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:38,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 14:42:38,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:38,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 763 [2020-10-28 14:42:38,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:38,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:38,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:42:38,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:42:38,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 14:42:38,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:38,866 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-28 14:42:39,168 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-10-28 14:42:39,330 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-28 14:42:39,585 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-28 14:42:39,819 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-10-28 14:42:40,038 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-10-28 14:42:40,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:40,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:40,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:40,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:40,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:40,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:42:40,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:40,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:40,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:40,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:40,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:40,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:42:40,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618390598] [2020-10-28 14:42:40,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:40,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 14:42:40,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396539615] [2020-10-28 14:42:40,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 14:42:40,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:40,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 14:42:40,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:42:40,970 INFO L87 Difference]: Start difference. First operand 241 states and 285 transitions. Second operand 22 states. [2020-10-28 14:42:42,055 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2020-10-28 14:42:42,611 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-28 14:42:42,904 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-28 14:42:43,298 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-28 14:42:43,666 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-28 14:42:44,126 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2020-10-28 14:42:45,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:45,903 INFO L93 Difference]: Finished difference Result 289 states and 337 transitions. [2020-10-28 14:42:45,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:42:45,904 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 65 [2020-10-28 14:42:45,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:45,907 INFO L225 Difference]: With dead ends: 289 [2020-10-28 14:42:45,907 INFO L226 Difference]: Without dead ends: 269 [2020-10-28 14:42:45,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:42:45,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-28 14:42:45,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 212. [2020-10-28 14:42:45,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-28 14:42:45,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 253 transitions. [2020-10-28 14:42:45,924 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 253 transitions. Word has length 65 [2020-10-28 14:42:45,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:45,924 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 253 transitions. [2020-10-28 14:42:45,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 14:42:45,924 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 253 transitions. [2020-10-28 14:42:45,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 14:42:45,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:45,926 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:45,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 14:42:45,926 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:45,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:45,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1492635639, now seen corresponding path program 5 times [2020-10-28 14:42:45,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:45,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258355755] [2020-10-28 14:42:45,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:45,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:45,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:46,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:46,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:46,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:47,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:47,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:49,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:49,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:49,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:50,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:50,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:50,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:50,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 14:42:50,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 14:42:50,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 14:42:50,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:50,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:50,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:42:50,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:42:50,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 14:42:50,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:51,504 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-28 14:42:51,632 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2020-10-28 14:42:51,849 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-28 14:42:52,023 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-28 14:42:52,272 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-28 14:42:52,501 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-10-28 14:42:52,729 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-28 14:42:53,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:53,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:53,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:53,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:53,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:53,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:53,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:42:53,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:53,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:53,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:53,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:53,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:53,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:53,628 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:42:53,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258355755] [2020-10-28 14:42:53,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:53,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 14:42:53,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319644418] [2020-10-28 14:42:53,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 14:42:53,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:53,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 14:42:53,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:42:53,630 INFO L87 Difference]: Start difference. First operand 212 states and 253 transitions. Second operand 22 states. [2020-10-28 14:42:54,968 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-10-28 14:42:55,598 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-28 14:42:55,918 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-28 14:42:56,397 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2020-10-28 14:42:56,766 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-28 14:42:57,241 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2020-10-28 14:42:58,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:58,875 INFO L93 Difference]: Finished difference Result 242 states and 284 transitions. [2020-10-28 14:42:58,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:42:58,876 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 65 [2020-10-28 14:42:58,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:58,878 INFO L225 Difference]: With dead ends: 242 [2020-10-28 14:42:58,878 INFO L226 Difference]: Without dead ends: 219 [2020-10-28 14:42:58,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 14:42:58,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-28 14:42:58,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 207. [2020-10-28 14:42:58,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-28 14:42:58,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 243 transitions. [2020-10-28 14:42:58,893 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 243 transitions. Word has length 65 [2020-10-28 14:42:58,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:58,893 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 243 transitions. [2020-10-28 14:42:58,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 14:42:58,894 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 243 transitions. [2020-10-28 14:42:58,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 14:42:58,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:58,895 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:58,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 14:42:58,895 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:58,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:58,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1725929816, now seen corresponding path program 18 times [2020-10-28 14:42:58,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:58,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597113381] [2020-10-28 14:42:58,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:59,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:00,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:00,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 14:43:00,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:00,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1066 [2020-10-28 14:43:00,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:00,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:00,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 14:43:00,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:43:00,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 14:43:00,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:00,419 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-10-28 14:43:00,716 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-10-28 14:43:01,053 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-28 14:43:01,503 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-28 14:43:02,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:43:02,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:02,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:02,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:02,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:43:02,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:02,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:43:02,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:02,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:02,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:43:02,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:02,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:43:02,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:02,574 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:43:02,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597113381] [2020-10-28 14:43:02,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:43:02,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 14:43:02,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970425031] [2020-10-28 14:43:02,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 14:43:02,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:43:02,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 14:43:02,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:43:02,577 INFO L87 Difference]: Start difference. First operand 207 states and 243 transitions. Second operand 23 states. [2020-10-28 14:43:04,547 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-10-28 14:43:05,176 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 77 [2020-10-28 14:43:05,653 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 83 [2020-10-28 14:43:06,096 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 86 [2020-10-28 14:43:07,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:43:07,375 INFO L93 Difference]: Finished difference Result 232 states and 270 transitions. [2020-10-28 14:43:07,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:43:07,376 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2020-10-28 14:43:07,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:43:07,377 INFO L225 Difference]: With dead ends: 232 [2020-10-28 14:43:07,377 INFO L226 Difference]: Without dead ends: 226 [2020-10-28 14:43:07,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 14:43:07,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-28 14:43:07,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2020-10-28 14:43:07,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-28 14:43:07,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 264 transitions. [2020-10-28 14:43:07,395 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 264 transitions. Word has length 65 [2020-10-28 14:43:07,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:43:07,395 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 264 transitions. [2020-10-28 14:43:07,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 14:43:07,395 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 264 transitions. [2020-10-28 14:43:07,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 14:43:07,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:43:07,396 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:43:07,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 14:43:07,397 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:43:07,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:43:07,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1881223064, now seen corresponding path program 5 times [2020-10-28 14:43:07,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:43:07,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776680149] [2020-10-28 14:43:07,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:43:07,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:07,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:08,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:08,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 14:43:08,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:08,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1187 [2020-10-28 14:43:08,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:08,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:08,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 14:43:08,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:43:08,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 14:43:08,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:09,096 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-28 14:43:09,217 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-10-28 14:43:09,498 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-28 14:43:09,724 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-10-28 14:43:09,964 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-28 14:43:10,403 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-10-28 14:43:11,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:43:11,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:11,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:11,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:11,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:43:11,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:11,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:43:11,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:11,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:11,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:43:11,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:11,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:43:11,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:11,360 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:43:11,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776680149] [2020-10-28 14:43:11,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:43:11,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 14:43:11,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334335130] [2020-10-28 14:43:11,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 14:43:11,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:43:11,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 14:43:11,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:43:11,362 INFO L87 Difference]: Start difference. First operand 226 states and 264 transitions. Second operand 23 states. [2020-10-28 14:43:13,597 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 78 [2020-10-28 14:43:14,080 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 81 [2020-10-28 14:43:15,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:43:15,134 INFO L93 Difference]: Finished difference Result 236 states and 275 transitions. [2020-10-28 14:43:15,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:43:15,135 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2020-10-28 14:43:15,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:43:15,137 INFO L225 Difference]: With dead ends: 236 [2020-10-28 14:43:15,137 INFO L226 Difference]: Without dead ends: 228 [2020-10-28 14:43:15,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:43:15,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-28 14:43:15,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2020-10-28 14:43:15,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-28 14:43:15,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 266 transitions. [2020-10-28 14:43:15,154 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 266 transitions. Word has length 65 [2020-10-28 14:43:15,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:43:15,154 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 266 transitions. [2020-10-28 14:43:15,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 14:43:15,155 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 266 transitions. [2020-10-28 14:43:15,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 14:43:15,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:43:15,156 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:43:15,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 14:43:15,156 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:43:15,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:43:15,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1240579869, now seen corresponding path program 19 times [2020-10-28 14:43:15,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:43:15,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720188465] [2020-10-28 14:43:15,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:43:15,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:15,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:16,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:16,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 14:43:16,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:16,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1029 [2020-10-28 14:43:16,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:16,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:16,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 14:43:16,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:43:16,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 14:43:16,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:16,705 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-10-28 14:43:17,002 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-28 14:43:17,229 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-28 14:43:17,546 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-10-28 14:43:17,767 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-10-28 14:43:18,115 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2020-10-28 14:43:18,385 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-28 14:43:18,700 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-28 14:43:19,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:43:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:19,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:19,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:19,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:43:19,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:19,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:43:19,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:19,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:19,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:43:19,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:19,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:43:19,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:19,687 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:43:19,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720188465] [2020-10-28 14:43:19,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:43:19,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 14:43:19,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592668410] [2020-10-28 14:43:19,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 14:43:19,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:43:19,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 14:43:19,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:43:19,689 INFO L87 Difference]: Start difference. First operand 228 states and 266 transitions. Second operand 24 states. [2020-10-28 14:43:21,740 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2020-10-28 14:43:22,187 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 67 [2020-10-28 14:43:22,468 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-28 14:43:22,888 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-28 14:43:23,287 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-28 14:43:23,596 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-28 14:43:24,280 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 95 [2020-10-28 14:43:26,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:43:26,180 INFO L93 Difference]: Finished difference Result 332 states and 382 transitions. [2020-10-28 14:43:26,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 14:43:26,181 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2020-10-28 14:43:26,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:43:26,183 INFO L225 Difference]: With dead ends: 332 [2020-10-28 14:43:26,184 INFO L226 Difference]: Without dead ends: 326 [2020-10-28 14:43:26,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=164, Invalid=1642, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:43:26,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-10-28 14:43:26,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 272. [2020-10-28 14:43:26,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-28 14:43:26,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 317 transitions. [2020-10-28 14:43:26,208 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 317 transitions. Word has length 67 [2020-10-28 14:43:26,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:43:26,208 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 317 transitions. [2020-10-28 14:43:26,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 14:43:26,209 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 317 transitions. [2020-10-28 14:43:26,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 14:43:26,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:43:26,210 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:43:26,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 14:43:26,210 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:43:26,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:43:26,211 INFO L82 PathProgramCache]: Analyzing trace with hash 933284707, now seen corresponding path program 5 times [2020-10-28 14:43:26,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:43:26,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354809567] [2020-10-28 14:43:26,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:43:26,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:26,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:27,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:27,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 14:43:27,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:27,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1058 [2020-10-28 14:43:27,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:27,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:27,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 14:43:27,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:43:27,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 14:43:27,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:27,922 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-28 14:43:28,321 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-28 14:43:28,462 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-10-28 14:43:28,788 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-10-28 14:43:28,944 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-10-28 14:43:29,220 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-10-28 14:43:29,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:43:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:29,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:29,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:29,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:43:29,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:29,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:43:29,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:29,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:29,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:43:29,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:29,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:43:29,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:43:29,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354809567] [2020-10-28 14:43:29,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:43:29,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 14:43:29,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130887754] [2020-10-28 14:43:29,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 14:43:29,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:43:29,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 14:43:29,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:43:29,904 INFO L87 Difference]: Start difference. First operand 272 states and 317 transitions. Second operand 24 states. [2020-10-28 14:43:31,751 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-28 14:43:32,478 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 75 [2020-10-28 14:43:33,022 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 71 [2020-10-28 14:43:33,244 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-10-28 14:43:33,849 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 82 [2020-10-28 14:43:35,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:43:35,531 INFO L93 Difference]: Finished difference Result 315 states and 364 transitions. [2020-10-28 14:43:35,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 14:43:35,533 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2020-10-28 14:43:35,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:43:35,534 INFO L225 Difference]: With dead ends: 315 [2020-10-28 14:43:35,535 INFO L226 Difference]: Without dead ends: 307 [2020-10-28 14:43:35,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=154, Invalid=1486, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 14:43:35,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-28 14:43:35,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 281. [2020-10-28 14:43:35,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-10-28 14:43:35,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 328 transitions. [2020-10-28 14:43:35,561 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 328 transitions. Word has length 67 [2020-10-28 14:43:35,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:43:35,561 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 328 transitions. [2020-10-28 14:43:35,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 14:43:35,561 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 328 transitions. [2020-10-28 14:43:35,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 14:43:35,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:43:35,562 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:43:35,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 14:43:35,563 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:43:35,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:43:35,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1324251230, now seen corresponding path program 20 times [2020-10-28 14:43:35,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:43:35,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558692615] [2020-10-28 14:43:35,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:43:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:35,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:36,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:36,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 14:43:36,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:36,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1280 [2020-10-28 14:43:36,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:36,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:36,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 14:43:36,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:43:36,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 14:43:36,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:37,571 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-28 14:43:37,724 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2020-10-28 14:43:37,902 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-28 14:43:38,067 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-10-28 14:43:38,474 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-10-28 14:43:38,712 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-10-28 14:43:39,098 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2020-10-28 14:43:39,382 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-28 14:43:39,653 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-28 14:43:40,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:43:40,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:40,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:40,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:40,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:43:40,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:40,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:43:40,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:40,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:40,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:43:40,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:40,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:43:40,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:40,830 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:43:40,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558692615] [2020-10-28 14:43:40,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:43:40,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 14:43:40,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495287421] [2020-10-28 14:43:40,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 14:43:40,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:43:40,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 14:43:40,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:43:40,831 INFO L87 Difference]: Start difference. First operand 281 states and 328 transitions. Second operand 25 states. [2020-10-28 14:43:42,685 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-10-28 14:43:43,044 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-28 14:43:43,526 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-28 14:43:43,944 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-28 14:43:44,542 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2020-10-28 14:43:46,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:43:46,866 INFO L93 Difference]: Finished difference Result 355 states and 408 transitions. [2020-10-28 14:43:46,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 14:43:46,867 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 69 [2020-10-28 14:43:46,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:43:46,870 INFO L225 Difference]: With dead ends: 355 [2020-10-28 14:43:46,870 INFO L226 Difference]: Without dead ends: 349 [2020-10-28 14:43:46,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=122, Invalid=1360, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 14:43:46,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-10-28 14:43:46,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 295. [2020-10-28 14:43:46,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-10-28 14:43:46,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 343 transitions. [2020-10-28 14:43:46,901 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 343 transitions. Word has length 69 [2020-10-28 14:43:46,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:43:46,902 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 343 transitions. [2020-10-28 14:43:46,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 14:43:46,902 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 343 transitions. [2020-10-28 14:43:46,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 14:43:46,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:43:46,903 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:43:46,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 14:43:46,903 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:43:46,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:43:46,904 INFO L82 PathProgramCache]: Analyzing trace with hash 815709465, now seen corresponding path program 21 times [2020-10-28 14:43:46,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:43:46,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048303622] [2020-10-28 14:43:46,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:43:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:47,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:48,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:48,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 14:43:48,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:48,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1315 [2020-10-28 14:43:48,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:48,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:48,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 14:43:48,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:43:48,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 14:43:48,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:48,789 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-10-28 14:43:49,103 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-10-28 14:43:49,293 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-10-28 14:43:49,567 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-10-28 14:43:49,783 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-10-28 14:43:50,084 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2020-10-28 14:43:50,365 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2020-10-28 14:43:50,640 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-10-28 14:43:51,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:43:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:51,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:51,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:51,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:43:51,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:51,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:43:51,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:51,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:51,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:43:51,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:51,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:43:51,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 14 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:43:51,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048303622] [2020-10-28 14:43:51,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:43:51,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 14:43:51,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798082443] [2020-10-28 14:43:51,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 14:43:51,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:43:51,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 14:43:51,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:43:51,788 INFO L87 Difference]: Start difference. First operand 295 states and 343 transitions. Second operand 25 states. [2020-10-28 14:43:53,638 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2020-10-28 14:43:54,000 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-28 14:43:54,478 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-28 14:43:54,885 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-28 14:43:55,465 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2020-10-28 14:43:57,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:43:57,710 INFO L93 Difference]: Finished difference Result 357 states and 410 transitions. [2020-10-28 14:43:57,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 14:43:57,712 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 71 [2020-10-28 14:43:57,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:43:57,714 INFO L225 Difference]: With dead ends: 357 [2020-10-28 14:43:57,714 INFO L226 Difference]: Without dead ends: 335 [2020-10-28 14:43:57,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=122, Invalid=1360, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 14:43:57,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-28 14:43:57,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 261. [2020-10-28 14:43:57,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-28 14:43:57,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 306 transitions. [2020-10-28 14:43:57,739 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 306 transitions. Word has length 71 [2020-10-28 14:43:57,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:43:57,739 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 306 transitions. [2020-10-28 14:43:57,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 14:43:57,739 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 306 transitions. [2020-10-28 14:43:57,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 14:43:57,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:43:57,740 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:43:57,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 14:43:57,741 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:43:57,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:43:57,741 INFO L82 PathProgramCache]: Analyzing trace with hash 779277081, now seen corresponding path program 6 times [2020-10-28 14:43:57,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:43:57,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770533378] [2020-10-28 14:43:57,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:43:57,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:57,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:58,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:58,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:58,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:58,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:58,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking...