/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/simple_search_value-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:40:27,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:40:27,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:40:27,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:40:27,567 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:40:27,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:40:27,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:40:27,572 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:40:27,574 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:40:27,575 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:40:27,583 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:40:27,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:40:27,586 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:40:27,587 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:40:27,588 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:40:27,589 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:40:27,590 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:40:27,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:40:27,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:40:27,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:40:27,597 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:40:27,599 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:40:27,600 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:40:27,601 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:40:27,604 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:40:27,604 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:40:27,605 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:40:27,606 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:40:27,606 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:40:27,607 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:40:27,607 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:40:27,608 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:40:27,609 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:40:27,610 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:40:27,611 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:40:27,612 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:40:27,612 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:40:27,613 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:40:27,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:40:27,614 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:40:27,615 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:40:27,616 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 14:40:27,658 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:40:27,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:40:27,661 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:40:27,662 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:40:27,662 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:40:27,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:40:27,662 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:40:27,663 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:40:27,663 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:40:27,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:40:27,664 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:40:27,664 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:40:27,665 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:40:27,665 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:40:27,665 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:40:27,665 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:40:27,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:40:27,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:40:27,666 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:40:27,666 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:40:27,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:40:27,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:40:27,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:40:27,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:40:27,667 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:40:27,667 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:40:27,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:40:27,668 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:40:27,668 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:40:27,668 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:40:28,118 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:40:28,142 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:40:28,145 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:40:28,147 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:40:28,147 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:40:28,148 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/simple_search_value-1.i [2020-10-28 14:40:28,221 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fc34a5b7f/6d90a7cfb49e40e0b255d0672bc7e6e0/FLAG450c430ae [2020-10-28 14:40:28,937 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:40:28,937 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/simple_search_value-1.i [2020-10-28 14:40:28,963 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fc34a5b7f/6d90a7cfb49e40e0b255d0672bc7e6e0/FLAG450c430ae [2020-10-28 14:40:29,156 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fc34a5b7f/6d90a7cfb49e40e0b255d0672bc7e6e0 [2020-10-28 14:40:29,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:40:29,174 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:40:29,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:40:29,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:40:29,182 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:40:29,183 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:40:29" (1/1) ... [2020-10-28 14:40:29,193 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8d4b309 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:29, skipping insertion in model container [2020-10-28 14:40:29,193 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:40:29" (1/1) ... [2020-10-28 14:40:29,202 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:40:29,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:40:29,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:40:29,713 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:40:29,784 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:40:29,849 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:40:29,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:29 WrapperNode [2020-10-28 14:40:29,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:40:29,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:40:29,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:40:29,851 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:40:29,865 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:29" (1/1) ... [2020-10-28 14:40:29,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:29" (1/1) ... [2020-10-28 14:40:29,880 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:29" (1/1) ... [2020-10-28 14:40:29,881 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:29" (1/1) ... [2020-10-28 14:40:29,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:29" (1/1) ... [2020-10-28 14:40:29,909 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:29" (1/1) ... [2020-10-28 14:40:29,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:29" (1/1) ... [2020-10-28 14:40:29,919 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:40:29,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:40:29,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:40:29,920 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:40:29,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:29" (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 14:40:29,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:40:29,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:40:29,997 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:40:29,997 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-28 14:40:29,998 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-28 14:40:29,998 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-28 14:40:29,998 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:40:29,998 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:40:29,998 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:40:29,998 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:40:29,999 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:40:29,999 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:40:29,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:40:29,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:40:29,999 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-28 14:40:29,999 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-28 14:40:30,000 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-28 14:40:30,000 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-28 14:40:30,000 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-28 14:40:30,000 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-28 14:40:30,000 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-28 14:40:30,000 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-28 14:40:30,001 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-28 14:40:30,001 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-28 14:40:30,001 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-28 14:40:30,001 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-28 14:40:30,001 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-28 14:40:30,001 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-28 14:40:30,001 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-28 14:40:30,002 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-28 14:40:30,002 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-28 14:40:30,002 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-28 14:40:30,002 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-28 14:40:30,002 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-28 14:40:30,002 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-28 14:40:30,002 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-28 14:40:30,003 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-28 14:40:30,003 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-28 14:40:30,003 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-28 14:40:30,003 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-28 14:40:30,003 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-28 14:40:30,003 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-28 14:40:30,004 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-28 14:40:30,004 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-28 14:40:30,004 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-28 14:40:30,004 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-28 14:40:30,004 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-28 14:40:30,004 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-28 14:40:30,030 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-28 14:40:30,030 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-28 14:40:30,031 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-28 14:40:30,031 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-28 14:40:30,032 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-28 14:40:30,035 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-28 14:40:30,035 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-28 14:40:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-28 14:40:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-28 14:40:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-28 14:40:30,039 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-28 14:40:30,039 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-28 14:40:30,039 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-28 14:40:30,039 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-28 14:40:30,039 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-28 14:40:30,039 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-28 14:40:30,039 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-28 14:40:30,040 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-28 14:40:30,040 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 14:40:30,040 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 14:40:30,040 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-28 14:40:30,040 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 14:40:30,041 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-28 14:40:30,041 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-28 14:40:30,042 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-28 14:40:30,043 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-28 14:40:30,043 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-28 14:40:30,046 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-28 14:40:30,046 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-28 14:40:30,046 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-28 14:40:30,046 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:40:30,047 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-28 14:40:30,047 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-28 14:40:30,047 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-28 14:40:30,047 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-28 14:40:30,048 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-28 14:40:30,048 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-28 14:40:30,048 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-28 14:40:30,048 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-28 14:40:30,048 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-28 14:40:30,048 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-28 14:40:30,048 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-28 14:40:30,048 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-28 14:40:30,049 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-28 14:40:30,049 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-28 14:40:30,049 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-28 14:40:30,049 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-28 14:40:30,049 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-28 14:40:30,049 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-28 14:40:30,049 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-28 14:40:30,050 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-28 14:40:30,050 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-28 14:40:30,050 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-28 14:40:30,050 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-28 14:40:30,050 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-28 14:40:30,050 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-28 14:40:30,050 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-28 14:40:30,051 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-28 14:40:30,051 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-28 14:40:30,051 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-28 14:40:30,051 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-28 14:40:30,051 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-28 14:40:30,051 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-28 14:40:30,051 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-28 14:40:30,052 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-28 14:40:30,052 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-28 14:40:30,052 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-28 14:40:30,052 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-28 14:40:30,052 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-28 14:40:30,053 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-28 14:40:30,054 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-28 14:40:30,054 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:40:30,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 14:40:30,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:40:30,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:40:30,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:40:30,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:40:30,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:40:30,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:40:30,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:40:30,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:40:30,478 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-28 14:40:30,650 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:40:30,650 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 14:40:30,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:40:30 BoogieIcfgContainer [2020-10-28 14:40:30,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:40:30,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:40:30,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:40:30,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:40:30,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:40:29" (1/3) ... [2020-10-28 14:40:30,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43e4bdc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:40:30, skipping insertion in model container [2020-10-28 14:40:30,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:29" (2/3) ... [2020-10-28 14:40:30,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43e4bdc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:40:30, skipping insertion in model container [2020-10-28 14:40:30,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:40:30" (3/3) ... [2020-10-28 14:40:30,662 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_search_value-1.i [2020-10-28 14:40:30,674 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:40:30,679 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:40:30,692 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:40:30,717 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:40:30,718 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:40:30,718 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:40:30,718 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:40:30,718 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:40:30,718 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:40:30,718 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:40:30,719 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:40:30,735 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-28 14:40:30,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 14:40:30,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:30,741 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:30,741 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:30,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:30,748 INFO L82 PathProgramCache]: Analyzing trace with hash -297690078, now seen corresponding path program 1 times [2020-10-28 14:40:30,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:30,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312210737] [2020-10-28 14:40:30,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:30,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:30,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:31,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:31,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:31,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 14:40:31,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:40:31,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 516 [2020-10-28 14:40:31,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:31,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:31,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:31,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:40:31,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:31,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:40:31,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:31,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:31,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:31,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:31,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:31,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:40:31,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:31,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:31,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:31,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:31,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:31,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:40:31,528 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 14:40:31,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312210737] [2020-10-28 14:40:31,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:40:31,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:40:31,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325512609] [2020-10-28 14:40:31,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:40:31,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:31,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:40:31,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:40:31,554 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-10-28 14:40:31,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:31,679 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2020-10-28 14:40:31,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:40:31,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-28 14:40:31,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:31,689 INFO L225 Difference]: With dead ends: 52 [2020-10-28 14:40:31,689 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 14:40:31,692 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 14:40:31,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 14:40:31,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-28 14:40:31,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 14:40:31,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-28 14:40:31,738 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 15 [2020-10-28 14:40:31,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:31,739 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-28 14:40:31,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:40:31,739 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-28 14:40:31,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 14:40:31,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:31,741 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:31,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:40:31,741 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:31,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:31,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1834434861, now seen corresponding path program 1 times [2020-10-28 14:40:31,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:31,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141941859] [2020-10-28 14:40:31,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:31,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:31,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:31,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:31,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:31,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:32,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:32,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 14:40:32,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:40:32,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 480 [2020-10-28 14:40:32,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:32,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:32,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:40:32,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:40:32,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:40:32,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:32,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:32,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:32,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:32,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:32,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:32,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:32,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:40:32,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:32,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:32,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:32,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:32,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:32,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:32,371 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 14:40:32,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141941859] [2020-10-28 14:40:32,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:40:32,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:40:32,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592186401] [2020-10-28 14:40:32,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:40:32,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:32,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:40:32,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:40:32,380 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 5 states. [2020-10-28 14:40:32,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:32,556 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2020-10-28 14:40:32,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:40:32,559 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-28 14:40:32,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:32,563 INFO L225 Difference]: With dead ends: 40 [2020-10-28 14:40:32,563 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 14:40:32,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:40:32,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 14:40:32,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2020-10-28 14:40:32,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 14:40:32,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-28 14:40:32,576 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 17 [2020-10-28 14:40:32,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:32,577 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-28 14:40:32,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:40:32,577 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-28 14:40:32,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:40:32,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:32,578 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 14:40:32,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:40:32,579 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:32,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:32,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1285728602, now seen corresponding path program 1 times [2020-10-28 14:40:32,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:32,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226594352] [2020-10-28 14:40:32,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:32,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:32,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:32,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:32,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:32,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:32,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:32,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:33,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:33,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:40:33,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:40:33,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1069 [2020-10-28 14:40:33,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:33,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:33,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:40:33,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 14:40:33,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:40:33,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:33,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:33,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:33,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:33,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:33,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:33,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:33,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:40:33,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:33,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:33,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:33,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:33,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:33,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:40:33,764 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 14:40:33,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226594352] [2020-10-28 14:40:33,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:40:33,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:40:33,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214666282] [2020-10-28 14:40:33,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:40:33,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:33,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:40:33,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:40:33,767 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 5 states. [2020-10-28 14:40:33,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:33,903 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-10-28 14:40:33,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:40:33,904 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-28 14:40:33,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:33,906 INFO L225 Difference]: With dead ends: 42 [2020-10-28 14:40:33,906 INFO L226 Difference]: Without dead ends: 32 [2020-10-28 14:40:33,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:40:33,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-28 14:40:33,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-28 14:40:33,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 14:40:33,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-10-28 14:40:33,915 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 22 [2020-10-28 14:40:33,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:33,916 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-10-28 14:40:33,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:40:33,916 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-10-28 14:40:33,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:40:33,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:33,917 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 14:40:33,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:40:33,917 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:33,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:33,918 INFO L82 PathProgramCache]: Analyzing trace with hash 489278760, now seen corresponding path program 1 times [2020-10-28 14:40:33,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:33,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931114587] [2020-10-28 14:40:33,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:33,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:33,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:33,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:33,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:34,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:34,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:40:34,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:40:34,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-28 14:40:34,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:34,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:34,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:40:34,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:40:34,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 14:40:34,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:34,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:34,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:34,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:34,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:34,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:34,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:40:34,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:34,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:34,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:34,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:34,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:34,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:34,185 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 14:40:34,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931114587] [2020-10-28 14:40:34,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:40:34,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:40:34,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367924128] [2020-10-28 14:40:34,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:40:34,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:34,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:40:34,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:40:34,187 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 5 states. [2020-10-28 14:40:34,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:34,304 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-10-28 14:40:34,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:40:34,305 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-28 14:40:34,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:34,306 INFO L225 Difference]: With dead ends: 58 [2020-10-28 14:40:34,306 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 14:40:34,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:40:34,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 14:40:34,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-28 14:40:34,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 14:40:34,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-10-28 14:40:34,313 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 22 [2020-10-28 14:40:34,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:34,314 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-10-28 14:40:34,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:40:34,314 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-10-28 14:40:34,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:40:34,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:34,315 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] [2020-10-28 14:40:34,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:40:34,315 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:34,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:34,316 INFO L82 PathProgramCache]: Analyzing trace with hash 996308539, now seen corresponding path program 1 times [2020-10-28 14:40:34,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:34,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393596654] [2020-10-28 14:40:34,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:34,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:34,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:34,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:34,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:35,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:35,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:40:35,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:40:35,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1093 [2020-10-28 14:40:35,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:35,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:35,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:40:35,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:40:35,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:40:35,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:35,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:35,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:35,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:35,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:35,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:35,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:40:35,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:35,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:35,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:35,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:35,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:35,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:40:35,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393596654] [2020-10-28 14:40:35,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:35,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 14:40:35,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208293896] [2020-10-28 14:40:35,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:40:35,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:35,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:40:35,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:40:35,509 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 6 states. [2020-10-28 14:40:35,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:35,656 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2020-10-28 14:40:35,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:40:35,657 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-28 14:40:35,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:35,658 INFO L225 Difference]: With dead ends: 64 [2020-10-28 14:40:35,658 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 14:40:35,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:40:35,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 14:40:35,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-28 14:40:35,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 14:40:35,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-28 14:40:35,666 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 27 [2020-10-28 14:40:35,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:35,666 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-28 14:40:35,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:40:35,666 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-28 14:40:35,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:40:35,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:35,667 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] [2020-10-28 14:40:35,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:40:35,668 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:35,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:35,668 INFO L82 PathProgramCache]: Analyzing trace with hash 980663498, now seen corresponding path program 2 times [2020-10-28 14:40:35,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:35,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116044220] [2020-10-28 14:40:35,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:35,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:35,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:35,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:35,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:37,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:37,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:40:37,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:40:37,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1700 [2020-10-28 14:40:37,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:37,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:37,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:40:37,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:40:37,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 14:40:37,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:37,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:37,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:37,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:37,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:37,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:37,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:40:37,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:37,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:37,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:37,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:37,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:37,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:37,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:40:37,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116044220] [2020-10-28 14:40:37,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:37,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:40:37,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213265354] [2020-10-28 14:40:37,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:40:37,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:37,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:40:37,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:40:37,486 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 7 states. [2020-10-28 14:40:37,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:37,643 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-10-28 14:40:37,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:40:37,644 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-28 14:40:37,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:37,644 INFO L225 Difference]: With dead ends: 69 [2020-10-28 14:40:37,645 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 14:40:37,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:40:37,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 14:40:37,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-10-28 14:40:37,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 14:40:37,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-10-28 14:40:37,652 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 32 [2020-10-28 14:40:37,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:37,652 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-10-28 14:40:37,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:40:37,652 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-10-28 14:40:37,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:40:37,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:37,654 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:40:37,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:40:37,654 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:37,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:37,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1698903963, now seen corresponding path program 3 times [2020-10-28 14:40:37,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:37,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114545863] [2020-10-28 14:40:37,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:37,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:37,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:37,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:37,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:38,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:39,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:39,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:40:39,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:40:39,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1604 [2020-10-28 14:40:39,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:39,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:39,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:40:39,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:40:39,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:40:39,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:39,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:39,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:39,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:39,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:39,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:39,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:40:39,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:39,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:39,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:39,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:39,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:39,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:39,395 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:40:39,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114545863] [2020-10-28 14:40:39,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:39,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:40:39,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426069126] [2020-10-28 14:40:39,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:40:39,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:39,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:40:39,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:40:39,398 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 8 states. [2020-10-28 14:40:39,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:39,607 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2020-10-28 14:40:39,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:40:39,607 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-28 14:40:39,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:39,609 INFO L225 Difference]: With dead ends: 74 [2020-10-28 14:40:39,609 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 14:40:39,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:40:39,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 14:40:39,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-10-28 14:40:39,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 14:40:39,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-10-28 14:40:39,620 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 37 [2020-10-28 14:40:39,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:39,621 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-10-28 14:40:39,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:40:39,621 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-10-28 14:40:39,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:40:39,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:39,625 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:40:39,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:40:39,625 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:39,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:39,626 INFO L82 PathProgramCache]: Analyzing trace with hash 934598506, now seen corresponding path program 4 times [2020-10-28 14:40:39,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:39,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101209163] [2020-10-28 14:40:39,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:39,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:39,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:39,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:40,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:43,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:43,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:40:43,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:40:43,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3376 [2020-10-28 14:40:43,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:43,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:43,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:40:43,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:40:43,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:40:43,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:43,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:43,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:43,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:43,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:43,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:43,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:40:43,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:43,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:43,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:43,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:43,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:43,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:43,160 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:40:43,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101209163] [2020-10-28 14:40:43,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:43,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:40:43,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239699767] [2020-10-28 14:40:43,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:40:43,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:43,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:40:43,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:40:43,164 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 9 states. [2020-10-28 14:40:43,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:43,410 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-10-28 14:40:43,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:40:43,411 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-28 14:40:43,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:43,412 INFO L225 Difference]: With dead ends: 79 [2020-10-28 14:40:43,412 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 14:40:43,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:40:43,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 14:40:43,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-10-28 14:40:43,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 14:40:43,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-10-28 14:40:43,424 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 42 [2020-10-28 14:40:43,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:43,425 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-10-28 14:40:43,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:40:43,427 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-10-28 14:40:43,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:40:43,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:43,428 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:40:43,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:40:43,429 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:43,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:43,430 INFO L82 PathProgramCache]: Analyzing trace with hash -139869957, now seen corresponding path program 5 times [2020-10-28 14:40:43,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:43,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626417385] [2020-10-28 14:40:43,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:43,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:43,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:43,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:44,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:47,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:47,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 14:40:47,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:40:47,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3609 [2020-10-28 14:40:47,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:47,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:47,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:40:47,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:40:47,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:40:47,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:47,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:47,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:47,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:47,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:47,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:47,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:40:47,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:47,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:47,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:47,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:47,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:47,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:40:47,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626417385] [2020-10-28 14:40:47,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:47,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:40:47,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653542600] [2020-10-28 14:40:47,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:40:47,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:47,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:40:47,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:40:47,233 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 10 states. [2020-10-28 14:40:47,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:47,508 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2020-10-28 14:40:47,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:40:47,509 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2020-10-28 14:40:47,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:47,510 INFO L225 Difference]: With dead ends: 84 [2020-10-28 14:40:47,510 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 14:40:47,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:40:47,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 14:40:47,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-10-28 14:40:47,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 14:40:47,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2020-10-28 14:40:47,528 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 47 [2020-10-28 14:40:47,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:47,528 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2020-10-28 14:40:47,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:40:47,528 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2020-10-28 14:40:47,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 14:40:47,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:47,534 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:40:47,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:40:47,534 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:47,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:47,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1597167094, now seen corresponding path program 6 times [2020-10-28 14:40:47,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:47,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046668728] [2020-10-28 14:40:47,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:47,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:47,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:47,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:48,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:49,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:51,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:51,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 14:40:51,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:40:51,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3941 [2020-10-28 14:40:51,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:51,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:51,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:40:51,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:40:51,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:40:51,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:51,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:51,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:51,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:51,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:51,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:51,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:40:51,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:51,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:51,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:51,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:51,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:51,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:40:51,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046668728] [2020-10-28 14:40:51,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:51,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:40:51,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390301147] [2020-10-28 14:40:51,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:40:51,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:51,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:40:51,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:40:51,654 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 11 states. [2020-10-28 14:40:51,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:51,866 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2020-10-28 14:40:51,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:40:51,866 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-28 14:40:51,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:51,867 INFO L225 Difference]: With dead ends: 89 [2020-10-28 14:40:51,868 INFO L226 Difference]: Without dead ends: 66 [2020-10-28 14:40:51,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:40:51,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-28 14:40:51,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-10-28 14:40:51,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-28 14:40:51,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2020-10-28 14:40:51,881 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 52 [2020-10-28 14:40:51,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:51,882 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2020-10-28 14:40:51,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:40:51,883 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2020-10-28 14:40:51,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 14:40:51,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:51,888 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:51,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:40:51,888 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:51,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:51,889 INFO L82 PathProgramCache]: Analyzing trace with hash 2080117339, now seen corresponding path program 7 times [2020-10-28 14:40:51,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:51,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999425254] [2020-10-28 14:40:51,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:51,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:52,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:52,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:53,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:56,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:56,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 14:40:56,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:40:56,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 14:40:56,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:56,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:56,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:40:56,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:40:56,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 14:40:56,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:40:57,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:57,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:57,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:57,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:57,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:57,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:57,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:40:57,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:57,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:57,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:57,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:57,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:57,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:57,071 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 7 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:40:57,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999425254] [2020-10-28 14:40:57,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:57,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:40:57,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67712980] [2020-10-28 14:40:57,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:40:57,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:57,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:40:57,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:40:57,075 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 12 states. [2020-10-28 14:40:57,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:57,345 INFO L93 Difference]: Finished difference Result 94 states and 107 transitions. [2020-10-28 14:40:57,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:40:57,346 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-10-28 14:40:57,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:57,348 INFO L225 Difference]: With dead ends: 94 [2020-10-28 14:40:57,348 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 14:40:57,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:40:57,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 14:40:57,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-10-28 14:40:57,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 14:40:57,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2020-10-28 14:40:57,362 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 57 [2020-10-28 14:40:57,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:57,362 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2020-10-28 14:40:57,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:40:57,362 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2020-10-28 14:40:57,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 14:40:57,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:57,365 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:57,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:40:57,365 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:57,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:57,366 INFO L82 PathProgramCache]: Analyzing trace with hash -602491734, now seen corresponding path program 8 times [2020-10-28 14:40:57,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:57,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478135457] [2020-10-28 14:40:57,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:57,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:57,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:58,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:59,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:00,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:00,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 14:41:00,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:41:00,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2988 [2020-10-28 14:41:00,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:00,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:00,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:41:00,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:41:00,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 14:41:00,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:00,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:00,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:00,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:00,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:00,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:00,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:00,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:41:00,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:00,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:00,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:00,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:00,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:00,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:00,550 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 8 proven. 156 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:41:00,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478135457] [2020-10-28 14:41:00,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:00,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:41:00,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015821267] [2020-10-28 14:41:00,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:41:00,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:00,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:41:00,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:41:00,553 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand 13 states. [2020-10-28 14:41:00,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:00,846 INFO L93 Difference]: Finished difference Result 99 states and 112 transitions. [2020-10-28 14:41:00,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:41:00,847 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 62 [2020-10-28 14:41:00,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:00,848 INFO L225 Difference]: With dead ends: 99 [2020-10-28 14:41:00,848 INFO L226 Difference]: Without dead ends: 76 [2020-10-28 14:41:00,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:41:00,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-28 14:41:00,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2020-10-28 14:41:00,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 14:41:00,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2020-10-28 14:41:00,856 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 62 [2020-10-28 14:41:00,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:00,856 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2020-10-28 14:41:00,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:41:00,856 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2020-10-28 14:41:00,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 14:41:00,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:00,857 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:00,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:41:00,858 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:00,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:00,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1948265403, now seen corresponding path program 9 times [2020-10-28 14:41:00,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:00,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969476110] [2020-10-28 14:41:00,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:00,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:01,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:02,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:03,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:04,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:04,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 14:41:04,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:41:04,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3590 [2020-10-28 14:41:04,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:04,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:04,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:41:04,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:41:04,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 14:41:04,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:04,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:04,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:04,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:04,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:04,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:04,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:04,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:41:04,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:04,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:04,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:04,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:04,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:04,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:41:04,672 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 9 proven. 198 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:41:04,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969476110] [2020-10-28 14:41:04,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:04,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:41:04,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150632223] [2020-10-28 14:41:04,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:41:04,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:04,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:41:04,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:41:04,676 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand 14 states. [2020-10-28 14:41:04,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:04,978 INFO L93 Difference]: Finished difference Result 104 states and 117 transitions. [2020-10-28 14:41:04,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:41:04,979 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-10-28 14:41:04,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:04,981 INFO L225 Difference]: With dead ends: 104 [2020-10-28 14:41:04,981 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 14:41:04,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:41:04,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 14:41:04,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2020-10-28 14:41:04,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 14:41:04,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2020-10-28 14:41:04,988 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 67 [2020-10-28 14:41:04,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:04,988 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2020-10-28 14:41:04,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:41:04,989 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2020-10-28 14:41:04,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 14:41:04,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:04,990 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:04,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:41:04,990 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:04,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:04,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1486129334, now seen corresponding path program 10 times [2020-10-28 14:41:04,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:04,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392091860] [2020-10-28 14:41:04,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:05,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:05,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:05,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:07,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:10,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:10,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 14:41:10,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:41:10,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 14:41:10,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:10,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:10,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 14:41:10,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:41:10,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 14:41:10,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:10,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:10,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:10,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:10,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:10,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:10,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:10,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:41:10,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:10,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:10,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:10,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:10,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:10,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:10,671 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 8 proven. 180 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-28 14:41:10,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392091860] [2020-10-28 14:41:10,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:10,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:41:10,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835235923] [2020-10-28 14:41:10,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:41:10,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:10,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:41:10,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:41:10,674 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand 17 states. [2020-10-28 14:41:11,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:11,123 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2020-10-28 14:41:11,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:41:11,124 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2020-10-28 14:41:11,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:11,125 INFO L225 Difference]: With dead ends: 100 [2020-10-28 14:41:11,125 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 14:41:11,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:41:11,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 14:41:11,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2020-10-28 14:41:11,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 14:41:11,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2020-10-28 14:41:11,141 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 72 [2020-10-28 14:41:11,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:11,141 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2020-10-28 14:41:11,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:41:11,141 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2020-10-28 14:41:11,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 14:41:11,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:11,142 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:11,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:41:11,143 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:11,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:11,143 INFO L82 PathProgramCache]: Analyzing trace with hash 2020263697, now seen corresponding path program 11 times [2020-10-28 14:41:11,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:11,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5424019] [2020-10-28 14:41:11,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:11,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:11,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:12,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:14,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:14,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:16,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:16,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 14:41:16,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:41:16,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 14:41:16,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:16,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:16,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 14:41:16,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:41:16,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 14:41:16,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:16,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:16,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:16,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:16,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:16,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:16,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:16,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:41:16,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:16,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:16,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:16,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:16,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:16,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:16,983 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-10-28 14:41:16,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5424019] [2020-10-28 14:41:16,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:16,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:41:16,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324439832] [2020-10-28 14:41:16,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:41:16,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:16,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:41:16,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:41:16,986 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand 17 states. [2020-10-28 14:41:17,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:17,800 INFO L93 Difference]: Finished difference Result 110 states and 125 transitions. [2020-10-28 14:41:17,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:41:17,800 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2020-10-28 14:41:17,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:17,802 INFO L225 Difference]: With dead ends: 110 [2020-10-28 14:41:17,802 INFO L226 Difference]: Without dead ends: 105 [2020-10-28 14:41:17,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:41:17,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-28 14:41:17,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2020-10-28 14:41:17,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-28 14:41:17,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2020-10-28 14:41:17,816 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 77 [2020-10-28 14:41:17,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:17,816 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2020-10-28 14:41:17,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:41:17,816 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2020-10-28 14:41:17,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 14:41:17,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:17,817 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:17,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:41:17,819 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:17,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:17,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1858520150, now seen corresponding path program 12 times [2020-10-28 14:41:17,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:17,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762069035] [2020-10-28 14:41:17,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:17,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:18,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:19,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:20,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:22,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:22,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 14:41:22,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:41:22,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 14:41:22,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:22,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:22,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 14:41:22,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:41:22,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 14:41:22,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:23,476 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-10-28 14:41:24,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:24,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:24,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:24,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:24,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:24,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:41:24,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:24,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:24,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:24,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:24,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:24,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 17 proven. 239 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-28 14:41:24,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762069035] [2020-10-28 14:41:24,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:24,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 14:41:24,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129858199] [2020-10-28 14:41:24,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 14:41:24,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:24,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 14:41:24,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:41:24,549 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand 24 states. [2020-10-28 14:41:25,037 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2020-10-28 14:41:25,226 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2020-10-28 14:41:25,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:25,759 INFO L93 Difference]: Finished difference Result 120 states and 138 transitions. [2020-10-28 14:41:25,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:41:25,760 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 82 [2020-10-28 14:41:25,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:25,762 INFO L225 Difference]: With dead ends: 120 [2020-10-28 14:41:25,762 INFO L226 Difference]: Without dead ends: 115 [2020-10-28 14:41:25,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:41:25,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-28 14:41:25,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 107. [2020-10-28 14:41:25,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-28 14:41:25,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 121 transitions. [2020-10-28 14:41:25,772 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 121 transitions. Word has length 82 [2020-10-28 14:41:25,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:25,772 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 121 transitions. [2020-10-28 14:41:25,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 14:41:25,772 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 121 transitions. [2020-10-28 14:41:25,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 14:41:25,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:25,773 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:25,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:41:25,774 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:25,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:25,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1066877263, now seen corresponding path program 13 times [2020-10-28 14:41:25,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:25,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568895027] [2020-10-28 14:41:25,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:25,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:25,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:26,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:27,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:29,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:30,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:32,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:32,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 14:41:32,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:41:32,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6550 [2020-10-28 14:41:32,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:32,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:32,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 14:41:32,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:41:32,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 14:41:32,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:33,365 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-28 14:41:33,734 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-28 14:41:33,905 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-10-28 14:41:34,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:34,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:34,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:34,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:34,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:34,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:34,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:41:34,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:34,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:34,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:34,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:34,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:34,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:34,667 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 13 proven. 262 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-28 14:41:34,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568895027] [2020-10-28 14:41:34,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:34,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 14:41:34,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909671839] [2020-10-28 14:41:34,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 14:41:34,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:34,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 14:41:34,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:41:34,670 INFO L87 Difference]: Start difference. First operand 107 states and 121 transitions. Second operand 26 states. [2020-10-28 14:41:35,253 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2020-10-28 14:41:35,511 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2020-10-28 14:41:35,789 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 64 [2020-10-28 14:41:36,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:36,401 INFO L93 Difference]: Finished difference Result 125 states and 143 transitions. [2020-10-28 14:41:36,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:41:36,402 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 87 [2020-10-28 14:41:36,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:36,402 INFO L225 Difference]: With dead ends: 125 [2020-10-28 14:41:36,402 INFO L226 Difference]: Without dead ends: 115 [2020-10-28 14:41:36,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:41:36,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-28 14:41:36,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 109. [2020-10-28 14:41:36,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-28 14:41:36,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 123 transitions. [2020-10-28 14:41:36,413 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 123 transitions. Word has length 87 [2020-10-28 14:41:36,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:36,414 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 123 transitions. [2020-10-28 14:41:36,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 14:41:36,414 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 123 transitions. [2020-10-28 14:41:36,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 14:41:36,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:36,415 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:36,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:41:36,415 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:36,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:36,416 INFO L82 PathProgramCache]: Analyzing trace with hash -386818893, now seen corresponding path program 1 times [2020-10-28 14:41:36,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:36,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996072436] [2020-10-28 14:41:36,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:36,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:36,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:37,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:38,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:39,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:41,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:41,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 14:41:41,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:41:41,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 14:41:41,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:41,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:41,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 14:41:41,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:41:41,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 14:41:41,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:42,288 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-10-28 14:41:42,673 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-28 14:41:42,980 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-28 14:41:43,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:43,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:43,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:43,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:43,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:43,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:43,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:41:43,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:43,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:43,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:43,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:43,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:43,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 7 proven. 258 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-28 14:41:43,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996072436] [2020-10-28 14:41:43,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:43,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 14:41:43,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139732039] [2020-10-28 14:41:43,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 14:41:43,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:43,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 14:41:43,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:41:43,680 INFO L87 Difference]: Start difference. First operand 109 states and 123 transitions. Second operand 25 states. [2020-10-28 14:41:44,177 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 59 [2020-10-28 14:41:44,478 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 73 [2020-10-28 14:41:44,794 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 71 [2020-10-28 14:41:45,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:45,588 INFO L93 Difference]: Finished difference Result 130 states and 149 transitions. [2020-10-28 14:41:45,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:41:45,590 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 87 [2020-10-28 14:41:45,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:45,592 INFO L225 Difference]: With dead ends: 130 [2020-10-28 14:41:45,592 INFO L226 Difference]: Without dead ends: 125 [2020-10-28 14:41:45,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:41:45,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-28 14:41:45,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 117. [2020-10-28 14:41:45,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-28 14:41:45,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 132 transitions. [2020-10-28 14:41:45,605 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 132 transitions. Word has length 87 [2020-10-28 14:41:45,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:45,605 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 132 transitions. [2020-10-28 14:41:45,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 14:41:45,606 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 132 transitions. [2020-10-28 14:41:45,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-28 14:41:45,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:45,607 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:45,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:41:45,607 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:45,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:45,607 INFO L82 PathProgramCache]: Analyzing trace with hash 287349576, now seen corresponding path program 2 times [2020-10-28 14:41:45,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:45,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604162510] [2020-10-28 14:41:45,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:45,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:45,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:46,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:46,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:48,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:50,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:50,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:50,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 14:41:50,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:41:50,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-28 14:41:50,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:50,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:50,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 14:41:50,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:41:50,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-28 14:41:50,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:51,418 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-10-28 14:41:51,638 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-28 14:41:51,896 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-10-28 14:41:52,197 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2020-10-28 14:41:52,517 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2020-10-28 14:41:53,001 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2020-10-28 14:41:53,165 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-28 14:41:53,342 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-28 14:41:53,543 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2020-10-28 14:41:54,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:54,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:54,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:54,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:54,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:54,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:41:54,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:54,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:54,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:54,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:54,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:54,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:54,151 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 30 proven. 269 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 14:41:54,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604162510] [2020-10-28 14:41:54,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:54,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 14:41:54,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850376312] [2020-10-28 14:41:54,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 14:41:54,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:54,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 14:41:54,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:41:54,154 INFO L87 Difference]: Start difference. First operand 117 states and 132 transitions. Second operand 28 states. [2020-10-28 14:41:54,898 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-28 14:41:55,349 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-28 14:41:55,571 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-28 14:41:55,919 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 84 [2020-10-28 14:41:56,192 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-28 14:41:56,471 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 75 [2020-10-28 14:41:56,833 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 93 [2020-10-28 14:41:57,250 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 100 [2020-10-28 14:41:57,617 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 86 [2020-10-28 14:41:58,054 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 93 [2020-10-28 14:41:58,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:58,856 INFO L93 Difference]: Finished difference Result 135 states and 154 transitions. [2020-10-28 14:41:58,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:41:58,856 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2020-10-28 14:41:58,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:58,858 INFO L225 Difference]: With dead ends: 135 [2020-10-28 14:41:58,858 INFO L226 Difference]: Without dead ends: 125 [2020-10-28 14:41:58,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=207, Invalid=2049, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 14:41:58,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-28 14:41:58,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 119. [2020-10-28 14:41:58,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-28 14:41:58,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 134 transitions. [2020-10-28 14:41:58,870 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 134 transitions. Word has length 92 [2020-10-28 14:41:58,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:58,871 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 134 transitions. [2020-10-28 14:41:58,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 14:41:58,871 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 134 transitions. [2020-10-28 14:41:58,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-28 14:41:58,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:58,872 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:58,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:41:58,872 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:58,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:58,873 INFO L82 PathProgramCache]: Analyzing trace with hash 967407946, now seen corresponding path program 3 times [2020-10-28 14:41:58,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:58,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834518789] [2020-10-28 14:41:58,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:58,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:59,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:00,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:02,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:03,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:03,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 14:42:03,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:42:03,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 14:42:03,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:03,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:03,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 14:42:03,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:42:03,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-28 14:42:03,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:04,665 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-10-28 14:42:05,105 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-10-28 14:42:05,832 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2020-10-28 14:42:06,048 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2020-10-28 14:42:06,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:06,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:06,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:06,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:06,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:06,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:06,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:42:06,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:06,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:06,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:06,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:06,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:06,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:06,805 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 5 proven. 299 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 14:42:06,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834518789] [2020-10-28 14:42:06,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:06,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 14:42:06,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740165791] [2020-10-28 14:42:06,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 14:42:06,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:06,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 14:42:06,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:42:06,807 INFO L87 Difference]: Start difference. First operand 119 states and 134 transitions. Second operand 29 states. [2020-10-28 14:42:07,520 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2020-10-28 14:42:08,087 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 90 [2020-10-28 14:42:08,684 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 88 [2020-10-28 14:42:09,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:09,528 INFO L93 Difference]: Finished difference Result 140 states and 160 transitions. [2020-10-28 14:42:09,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:42:09,528 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 92 [2020-10-28 14:42:09,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:09,530 INFO L225 Difference]: With dead ends: 140 [2020-10-28 14:42:09,530 INFO L226 Difference]: Without dead ends: 135 [2020-10-28 14:42:09,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=190, Invalid=1532, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 14:42:09,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-28 14:42:09,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 127. [2020-10-28 14:42:09,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-28 14:42:09,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 143 transitions. [2020-10-28 14:42:09,542 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 143 transitions. Word has length 92 [2020-10-28 14:42:09,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:09,542 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 143 transitions. [2020-10-28 14:42:09,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 14:42:09,542 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 143 transitions. [2020-10-28 14:42:09,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 14:42:09,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:09,543 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:09,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:42:09,544 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:09,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:09,544 INFO L82 PathProgramCache]: Analyzing trace with hash 111019281, now seen corresponding path program 4 times [2020-10-28 14:42:09,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:09,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413387881] [2020-10-28 14:42:09,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:09,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:10,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:10,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:14,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:14,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 14:42:14,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:42:14,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 14:42:14,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:14,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:14,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 14:42:14,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:42:14,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-28 14:42:14,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:15,199 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-10-28 14:42:15,463 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-28 14:42:15,777 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-10-28 14:42:15,922 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-28 14:42:16,155 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2020-10-28 14:42:16,318 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-10-28 14:42:16,553 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2020-10-28 14:42:16,949 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-28 14:42:17,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:17,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:17,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:17,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:17,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:17,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:42:17,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:17,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:17,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:17,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:17,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:17,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:18,009 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 21 proven. 307 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 14:42:18,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413387881] [2020-10-28 14:42:18,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:18,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 14:42:18,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797858906] [2020-10-28 14:42:18,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 14:42:18,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:18,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 14:42:18,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:42:18,011 INFO L87 Difference]: Start difference. First operand 127 states and 143 transitions. Second operand 29 states. [2020-10-28 14:42:19,267 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 87 [2020-10-28 14:42:19,660 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 89 [2020-10-28 14:42:20,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:20,732 INFO L93 Difference]: Finished difference Result 145 states and 165 transitions. [2020-10-28 14:42:20,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 14:42:20,732 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 97 [2020-10-28 14:42:20,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:20,734 INFO L225 Difference]: With dead ends: 145 [2020-10-28 14:42:20,734 INFO L226 Difference]: Without dead ends: 135 [2020-10-28 14:42:20,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=145, Invalid=1415, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 14:42:20,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-28 14:42:20,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 129. [2020-10-28 14:42:20,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-28 14:42:20,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 145 transitions. [2020-10-28 14:42:20,744 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 145 transitions. Word has length 97 [2020-10-28 14:42:20,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:20,745 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 145 transitions. [2020-10-28 14:42:20,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 14:42:20,745 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 145 transitions. [2020-10-28 14:42:20,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 14:42:20,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:20,746 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:20,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:42:20,746 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:20,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:20,746 INFO L82 PathProgramCache]: Analyzing trace with hash 791077651, now seen corresponding path program 5 times [2020-10-28 14:42:20,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:20,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403644681] [2020-10-28 14:42:20,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:20,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:21,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:23,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:24,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:26,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:26,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 14:42:26,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:42:26,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5841 [2020-10-28 14:42:26,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:26,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:26,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 14:42:26,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:42:26,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 14:42:26,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:33,917 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 57 [2020-10-28 14:42:34,517 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 72 [2020-10-28 14:42:38,206 WARN L193 SmtUtils]: Spent 3.55 s on a formula simplification. DAG size of input: 350 DAG size of output: 77 [2020-10-28 14:42:43,009 WARN L193 SmtUtils]: Spent 4.64 s on a formula simplification. DAG size of input: 415 DAG size of output: 87 [2020-10-28 14:42:48,463 WARN L193 SmtUtils]: Spent 5.22 s on a formula simplification. DAG size of input: 421 DAG size of output: 92 [2020-10-28 14:42:58,831 WARN L193 SmtUtils]: Spent 9.92 s on a formula simplification. DAG size of input: 610 DAG size of output: 125 [2020-10-28 14:43:04,124 WARN L193 SmtUtils]: Spent 5.05 s on a formula simplification. DAG size of input: 436 DAG size of output: 118 [2020-10-28 14:43:13,415 WARN L193 SmtUtils]: Spent 8.90 s on a formula simplification. DAG size of input: 642 DAG size of output: 133 [2020-10-28 14:43:19,065 WARN L193 SmtUtils]: Spent 5.41 s on a formula simplification. DAG size of input: 507 DAG size of output: 141 [2020-10-28 14:43:32,255 WARN L193 SmtUtils]: Spent 12.70 s on a formula simplification. DAG size of input: 848 DAG size of output: 232 [2020-10-28 14:43:35,111 WARN L193 SmtUtils]: Spent 2.69 s on a formula simplification. DAG size of input: 342 DAG size of output: 146 [2020-10-28 14:43:40,217 WARN L193 SmtUtils]: Spent 4.83 s on a formula simplification. DAG size of input: 508 DAG size of output: 183 [2020-10-28 14:43:43,349 WARN L193 SmtUtils]: Spent 2.92 s on a formula simplification. DAG size of input: 338 DAG size of output: 157 [2020-10-28 14:43:48,132 WARN L193 SmtUtils]: Spent 4.48 s on a formula simplification. DAG size of input: 481 DAG size of output: 197 [2020-10-28 14:43:50,654 WARN L193 SmtUtils]: Spent 2.31 s on a formula simplification. DAG size of input: 315 DAG size of output: 162 [2020-10-28 14:43:55,120 WARN L193 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 347 DAG size of output: 179 [2020-10-28 14:43:58,269 WARN L193 SmtUtils]: Spent 2.91 s on a formula simplification. DAG size of input: 320 DAG size of output: 223 [2020-10-28 14:44:00,843 WARN L193 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 281 DAG size of output: 133 [2020-10-28 14:44:01,910 WARN L193 SmtUtils]: Spent 858.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 122 [2020-10-28 14:44:02,153 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 44 [2020-10-28 14:44:02,401 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 42 [2020-10-28 14:44:03,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:03,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:03,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:03,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:03,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:03,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:44:03,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:03,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:03,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:03,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:03,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:03,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:03,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403644681] [2020-10-28 14:44:03,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:03,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 14:44:03,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679121712] [2020-10-28 14:44:03,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 14:44:03,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:03,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 14:44:03,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=986, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:44:03,952 INFO L87 Difference]: Start difference. First operand 129 states and 145 transitions. Second operand 33 states. [2020-10-28 14:44:04,825 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 95 [2020-10-28 14:44:05,759 WARN L193 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 115 [2020-10-28 14:44:07,169 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 152 DAG size of output: 148 [2020-10-28 14:44:09,398 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 237 DAG size of output: 223