/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:10:35,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:10:35,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:10:35,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:10:35,563 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:10:35,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:10:35,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:10:35,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:10:35,585 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:10:35,593 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:10:35,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:10:35,597 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:10:35,598 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:10:35,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:10:35,606 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:10:35,609 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:10:35,611 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:10:35,617 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:10:35,626 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:10:35,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:10:35,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:10:35,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:10:35,642 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:10:35,643 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:10:35,651 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:10:35,652 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:10:35,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:10:35,654 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:10:35,654 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:10:35,656 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:10:35,656 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:10:35,657 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:10:35,658 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:10:35,659 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:10:35,661 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:10:35,661 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:10:35,662 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:10:35,662 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:10:35,663 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:10:35,664 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:10:35,665 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:10:35,666 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 [2020-10-26 23:10:35,696 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:10:35,696 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:10:35,698 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:10:35,699 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:10:35,699 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:10:35,699 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:10:35,699 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:10:35,700 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:10:35,700 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:10:35,700 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:10:35,700 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:10:35,700 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:10:35,701 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:10:35,701 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:10:35,701 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:10:35,701 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:10:35,701 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:10:35,702 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:10:35,702 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:10:35,702 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:10:35,702 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:10:35,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:10:35,703 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:10:35,703 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:10:35,703 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:10:35,703 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:10:35,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:10:35,704 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:10:35,704 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:10:35,704 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:10:36,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:10:36,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:10:36,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:10:36,225 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:10:36,226 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:10:36,227 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label29.c [2020-10-26 23:10:36,339 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af57b2f3f/6a9077b194584be983d0db58f274c9cb/FLAG7595d4335 [2020-10-26 23:10:37,591 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:10:37,592 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label29.c [2020-10-26 23:10:37,632 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af57b2f3f/6a9077b194584be983d0db58f274c9cb/FLAG7595d4335 [2020-10-26 23:10:37,977 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af57b2f3f/6a9077b194584be983d0db58f274c9cb [2020-10-26 23:10:37,981 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:10:37,988 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:10:37,990 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:10:37,990 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:10:37,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:10:38,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:10:37" (1/1) ... [2020-10-26 23:10:38,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62d463e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:10:38, skipping insertion in model container [2020-10-26 23:10:38,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:10:37" (1/1) ... [2020-10-26 23:10:38,017 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:10:38,183 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:10:39,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:10:40,001 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:10:40,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:10:40,834 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:10:40,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:10:40 WrapperNode [2020-10-26 23:10:40,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:10:40,836 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:10:40,836 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:10:40,837 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:10:40,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:10:40" (1/1) ... [2020-10-26 23:10:40,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:10:40" (1/1) ... [2020-10-26 23:10:40,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:10:40" (1/1) ... [2020-10-26 23:10:40,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:10:40" (1/1) ... [2020-10-26 23:10:41,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:10:40" (1/1) ... [2020-10-26 23:10:41,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:10:40" (1/1) ... [2020-10-26 23:10:41,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:10:40" (1/1) ... [2020-10-26 23:10:41,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:10:41,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:10:41,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:10:41,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:10:41,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:10:40" (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 [2020-10-26 23:10:41,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:10:41,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:10:41,550 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:10:41,551 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:10:41,551 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:10:41,552 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 23:10:41,552 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 23:10:41,552 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:10:41,552 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:10:41,553 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:10:41,554 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 23:10:41,554 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 23:10:41,554 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:10:41,554 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:10:41,555 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:10:41,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:10:41,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:10:41,556 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:10:41,556 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:10:41,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:10:41,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:10:41,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:10:41,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:10:41,557 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:10:41,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:10:52,071 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:10:52,073 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:10:52,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:10:52 BoogieIcfgContainer [2020-10-26 23:10:52,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:10:52,084 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:10:52,084 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:10:52,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:10:52,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:10:37" (1/3) ... [2020-10-26 23:10:52,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dc84701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:10:52, skipping insertion in model container [2020-10-26 23:10:52,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:10:40" (2/3) ... [2020-10-26 23:10:52,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dc84701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:10:52, skipping insertion in model container [2020-10-26 23:10:52,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:10:52" (3/3) ... [2020-10-26 23:10:52,095 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label29.c [2020-10-26 23:10:52,109 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:10:52,117 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:10:52,132 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:10:52,186 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:10:52,187 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:10:52,187 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:10:52,187 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:10:52,187 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:10:52,187 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:10:52,188 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:10:52,188 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:10:52,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-26 23:10:52,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 23:10:52,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:10:52,258 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] [2020-10-26 23:10:52,258 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:10:52,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:10:52,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1514465110, now seen corresponding path program 1 times [2020-10-26 23:10:52,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:10:52,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047566599] [2020-10-26 23:10:52,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:10:52,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:52,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:53,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:53,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 23:10:53,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:10:53,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 492 [2020-10-26 23:10:53,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:53,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:10:53,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:10:53,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 23:10:53,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:10:53,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:10:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:53,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:53,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:53,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:10:53,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:10:53,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-26 23:10:53,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:53,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:10:53,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:10:53,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:10:53,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:10:53,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047566599] [2020-10-26 23:10:53,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:10:53,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:10:53,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565816599] [2020-10-26 23:10:53,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:10:53,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:10:53,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:10:53,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:10:53,403 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-26 23:11:16,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:11:16,138 INFO L93 Difference]: Finished difference Result 3112 states and 5735 transitions. [2020-10-26 23:11:16,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:11:16,142 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-26 23:11:16,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:11:16,183 INFO L225 Difference]: With dead ends: 3112 [2020-10-26 23:11:16,184 INFO L226 Difference]: Without dead ends: 1904 [2020-10-26 23:11:16,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:11:16,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2020-10-26 23:11:16,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1884. [2020-10-26 23:11:16,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1884 states. [2020-10-26 23:11:16,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 2891 transitions. [2020-10-26 23:11:16,446 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 2891 transitions. Word has length 21 [2020-10-26 23:11:16,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:11:16,447 INFO L481 AbstractCegarLoop]: Abstraction has 1884 states and 2891 transitions. [2020-10-26 23:11:16,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:11:16,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 2891 transitions. [2020-10-26 23:11:16,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-26 23:11:16,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:11:16,452 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:11:16,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:11:16,453 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:11:16,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:11:16,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1193305883, now seen corresponding path program 1 times [2020-10-26 23:11:16,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:11:16,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534574269] [2020-10-26 23:11:16,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:11:16,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:16,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:17,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:17,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:17,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 23:11:17,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:11:17,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1349 [2020-10-26 23:11:17,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:17,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:11:17,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:11:17,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 23:11:17,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:11:17,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:11:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:17,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:18,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:18,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:11:18,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:11:18,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 23:11:18,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:18,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:11:18,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:11:18,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:11:18,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:11:18,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:11:18,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:18,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:18,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:18,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 23:11:18,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:11:18,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-26 23:11:18,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:18,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:11:18,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:11:18,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 23:11:18,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:11:18,470 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:11:18,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534574269] [2020-10-26 23:11:18,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:11:18,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:11:18,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535827567] [2020-10-26 23:11:18,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:11:18,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:11:18,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:11:18,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:11:18,477 INFO L87 Difference]: Start difference. First operand 1884 states and 2891 transitions. Second operand 7 states. [2020-10-26 23:11:42,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:11:42,052 INFO L93 Difference]: Finished difference Result 5679 states and 8693 transitions. [2020-10-26 23:11:42,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:11:42,055 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 90 [2020-10-26 23:11:42,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:11:42,078 INFO L225 Difference]: With dead ends: 5679 [2020-10-26 23:11:42,079 INFO L226 Difference]: Without dead ends: 3801 [2020-10-26 23:11:42,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:11:42,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2020-10-26 23:11:42,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 3709. [2020-10-26 23:11:42,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3709 states. [2020-10-26 23:11:42,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3709 states to 3709 states and 5285 transitions. [2020-10-26 23:11:42,218 INFO L78 Accepts]: Start accepts. Automaton has 3709 states and 5285 transitions. Word has length 90 [2020-10-26 23:11:42,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:11:42,218 INFO L481 AbstractCegarLoop]: Abstraction has 3709 states and 5285 transitions. [2020-10-26 23:11:42,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:11:42,219 INFO L276 IsEmpty]: Start isEmpty. Operand 3709 states and 5285 transitions. [2020-10-26 23:11:42,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-26 23:11:42,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:11:42,223 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:11:42,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:11:42,223 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:11:42,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:11:42,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1263401653, now seen corresponding path program 1 times [2020-10-26 23:11:42,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:11:42,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685226515] [2020-10-26 23:11:42,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:11:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:42,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:42,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:43,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:43,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:43,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 23:11:43,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:11:43,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1432 [2020-10-26 23:11:43,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:43,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:11:43,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:11:43,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 23:11:43,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:11:43,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:11:43,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:43,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:43,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:43,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:11:43,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:11:43,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 23:11:43,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:43,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:11:43,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:11:43,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:11:43,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:11:43,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:11:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:44,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:44,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:44,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:44,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 23:11:44,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:11:44,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 506 [2020-10-26 23:11:44,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:44,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:11:44,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:11:44,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 23:11:44,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:11:44,606 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 23:11:44,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685226515] [2020-10-26 23:11:44,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:11:44,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:11:44,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486517725] [2020-10-26 23:11:44,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 23:11:44,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:11:44,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 23:11:44,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:11:44,612 INFO L87 Difference]: Start difference. First operand 3709 states and 5285 transitions. Second operand 6 states. [2020-10-26 23:12:06,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:12:06,120 INFO L93 Difference]: Finished difference Result 10878 states and 15665 transitions. [2020-10-26 23:12:06,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 23:12:06,124 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-10-26 23:12:06,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:12:06,176 INFO L225 Difference]: With dead ends: 10878 [2020-10-26 23:12:06,176 INFO L226 Difference]: Without dead ends: 7175 [2020-10-26 23:12:06,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:12:06,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7175 states. [2020-10-26 23:12:06,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7175 to 7124. [2020-10-26 23:12:06,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7124 states. [2020-10-26 23:12:06,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7124 states to 7124 states and 9171 transitions. [2020-10-26 23:12:06,534 INFO L78 Accepts]: Start accepts. Automaton has 7124 states and 9171 transitions. Word has length 98 [2020-10-26 23:12:06,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:12:06,534 INFO L481 AbstractCegarLoop]: Abstraction has 7124 states and 9171 transitions. [2020-10-26 23:12:06,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 23:12:06,535 INFO L276 IsEmpty]: Start isEmpty. Operand 7124 states and 9171 transitions. [2020-10-26 23:12:06,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-26 23:12:06,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:12:06,552 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:12:06,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:12:06,556 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:12:06,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:12:06,557 INFO L82 PathProgramCache]: Analyzing trace with hash -178596182, now seen corresponding path program 1 times [2020-10-26 23:12:06,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:12:06,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125012804] [2020-10-26 23:12:06,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:12:06,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:06,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:06,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:09,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:09,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-26 23:12:09,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:12:09,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2981 [2020-10-26 23:12:09,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:09,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:12:09,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:12:09,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-26 23:12:09,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:12:09,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:12:09,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:09,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:09,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:09,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:12:09,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:09,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 23:12:09,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:09,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:12:09,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:12:09,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:12:09,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:12:09,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:12:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:09,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:10,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:10,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:12:10,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:10,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-26 23:12:10,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:10,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:12:10,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:12:10,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:12:10,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:12:10,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 23:12:10,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:10,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:10,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:10,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 23:12:10,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:10,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-26 23:12:10,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:10,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:12:10,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-26 23:12:10,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:12:10,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:12:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 26 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 23:12:10,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125012804] [2020-10-26 23:12:10,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:12:10,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:12:10,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654604099] [2020-10-26 23:12:10,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:12:10,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:12:10,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:12:10,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:12:10,623 INFO L87 Difference]: Start difference. First operand 7124 states and 9171 transitions. Second operand 7 states. [2020-10-26 23:12:34,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:12:34,872 INFO L93 Difference]: Finished difference Result 13645 states and 17787 transitions. [2020-10-26 23:12:34,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 23:12:34,875 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 191 [2020-10-26 23:12:34,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:12:34,917 INFO L225 Difference]: With dead ends: 13645 [2020-10-26 23:12:34,917 INFO L226 Difference]: Without dead ends: 7330 [2020-10-26 23:12:34,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:12:34,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7330 states. [2020-10-26 23:12:35,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7330 to 7236. [2020-10-26 23:12:35,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7236 states. [2020-10-26 23:12:35,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7236 states to 7236 states and 9328 transitions. [2020-10-26 23:12:35,193 INFO L78 Accepts]: Start accepts. Automaton has 7236 states and 9328 transitions. Word has length 191 [2020-10-26 23:12:35,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:12:35,194 INFO L481 AbstractCegarLoop]: Abstraction has 7236 states and 9328 transitions. [2020-10-26 23:12:35,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:12:35,194 INFO L276 IsEmpty]: Start isEmpty. Operand 7236 states and 9328 transitions. [2020-10-26 23:12:35,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-26 23:12:35,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:12:35,199 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:12:35,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:12:35,200 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:12:35,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:12:35,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1857904049, now seen corresponding path program 1 times [2020-10-26 23:12:35,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:12:35,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854163665] [2020-10-26 23:12:35,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:12:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:35,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:35,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:36,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:36,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:36,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-10-26 23:12:36,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:12:36,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1695 [2020-10-26 23:12:36,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:36,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:12:36,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-26 23:12:36,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-26 23:12:36,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:12:37,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:12:37,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:37,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:37,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:37,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:12:37,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:37,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 23:12:37,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:37,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:12:37,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:12:37,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:12:37,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:12:37,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:12:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:37,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:37,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:37,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:12:37,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:12:37,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-26 23:12:37,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:37,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:12:37,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:12:37,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 23:12:37,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:12:37,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 23:12:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:12:37,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:37,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:12:37,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:12:37,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 23:12:37,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:12:37,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-26 23:12:37,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:12:37,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:12:37,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:12:37,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 23:12:37,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:12:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 85 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 23:12:38,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854163665] [2020-10-26 23:12:38,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:12:38,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 23:12:38,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746854849] [2020-10-26 23:12:38,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:12:38,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:12:38,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:12:38,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:12:38,027 INFO L87 Difference]: Start difference. First operand 7236 states and 9328 transitions. Second operand 8 states. [2020-10-26 23:13:20,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:13:20,722 INFO L93 Difference]: Finished difference Result 20684 states and 28932 transitions. [2020-10-26 23:13:20,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 23:13:20,724 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 198 [2020-10-26 23:13:20,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:13:20,810 INFO L225 Difference]: With dead ends: 20684 [2020-10-26 23:13:20,811 INFO L226 Difference]: Without dead ends: 14257 [2020-10-26 23:13:20,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 23:13:20,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14257 states. [2020-10-26 23:13:21,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14257 to 14155. [2020-10-26 23:13:21,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14155 states. [2020-10-26 23:13:21,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14155 states to 14155 states and 18936 transitions. [2020-10-26 23:13:21,347 INFO L78 Accepts]: Start accepts. Automaton has 14155 states and 18936 transitions. Word has length 198 [2020-10-26 23:13:21,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:13:21,349 INFO L481 AbstractCegarLoop]: Abstraction has 14155 states and 18936 transitions. [2020-10-26 23:13:21,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:13:21,349 INFO L276 IsEmpty]: Start isEmpty. Operand 14155 states and 18936 transitions. [2020-10-26 23:13:21,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-10-26 23:13:21,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:13:21,354 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:13:21,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:13:21,355 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:13:21,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:13:21,356 INFO L82 PathProgramCache]: Analyzing trace with hash 686146395, now seen corresponding path program 1 times [2020-10-26 23:13:21,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:13:21,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741442116] [2020-10-26 23:13:21,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:13:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:21,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:21,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:22,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:22,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:23,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:25,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:25,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 257 [2020-10-26 23:13:25,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 23:13:25,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4202 [2020-10-26 23:13:25,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:25,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 23:13:25,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:13:25,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 248 [2020-10-26 23:13:25,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:25,981 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:13:25,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:13:25,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:25,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:26,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:26,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:13:26,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:13:26,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 23:13:26,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:26,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:13:26,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:13:26,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:13:26,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:26,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:13:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:26,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:26,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:26,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:26,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:13:26,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:13:26,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 342 [2020-10-26 23:13:26,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:26,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:13:26,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:13:26,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-26 23:13:26,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:26,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 23:13:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:26,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:26,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:27,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:27,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:13:27,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:13:27,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 417 [2020-10-26 23:13:27,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:27,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:13:27,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:13:27,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:13:27,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:13:27,555 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2020-10-26 23:13:27,766 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2020-10-26 23:13:27,976 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2020-10-26 23:13:28,695 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 12 proven. 103 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 23:13:28,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741442116] [2020-10-26 23:13:28,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:13:28,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 23:13:28,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32768970] [2020-10-26 23:13:28,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 23:13:28,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:13:28,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 23:13:28,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:13:28,701 INFO L87 Difference]: Start difference. First operand 14155 states and 18936 transitions. Second operand 12 states. [2020-10-26 23:13:29,194 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2020-10-26 23:13:29,848 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-10-26 23:13:30,199 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2020-10-26 23:13:32,219 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2020-10-26 23:13:32,713 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-26 23:13:33,786 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2020-10-26 23:13:33,970 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2020-10-26 23:13:34,564 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-26 23:13:35,122 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2020-10-26 23:13:35,551 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-10-26 23:13:36,001 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-26 23:13:36,795 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-26 23:13:38,729 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2020-10-26 23:13:39,142 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2020-10-26 23:13:40,645 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2020-10-26 23:13:45,427 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2020-10-26 23:14:13,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:14:13,885 INFO L93 Difference]: Finished difference Result 20005 states and 30245 transitions. [2020-10-26 23:14:13,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 23:14:13,888 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 243 [2020-10-26 23:14:13,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:14:14,003 INFO L225 Difference]: With dead ends: 20005 [2020-10-26 23:14:14,003 INFO L226 Difference]: Without dead ends: 20002 [2020-10-26 23:14:14,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=314, Invalid=876, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 23:14:14,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20002 states. [2020-10-26 23:14:14,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20002 to 17813. [2020-10-26 23:14:14,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17813 states. [2020-10-26 23:14:14,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17813 states to 17813 states and 25830 transitions. [2020-10-26 23:14:14,825 INFO L78 Accepts]: Start accepts. Automaton has 17813 states and 25830 transitions. Word has length 243 [2020-10-26 23:14:14,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:14:14,827 INFO L481 AbstractCegarLoop]: Abstraction has 17813 states and 25830 transitions. [2020-10-26 23:14:14,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 23:14:14,827 INFO L276 IsEmpty]: Start isEmpty. Operand 17813 states and 25830 transitions. [2020-10-26 23:14:14,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-10-26 23:14:14,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:14:14,835 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:14:14,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:14:14,836 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:14:14,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:14:14,837 INFO L82 PathProgramCache]: Analyzing trace with hash -376977115, now seen corresponding path program 1 times [2020-10-26 23:14:14,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:14:14,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324837113] [2020-10-26 23:14:14,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:14:14,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:14,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:15,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:15,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:17,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:17,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:18,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:19,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:20,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:20,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 311 [2020-10-26 23:14:20,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 23:14:20,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5086 [2020-10-26 23:14:20,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:20,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:14:20,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:14:20,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 213 [2020-10-26 23:14:20,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:14:20,184 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:14:20,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:14:20,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:20,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:20,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:20,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:14:20,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:14:20,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 23:14:20,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:20,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:14:20,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:14:20,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:14:20,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:14:20,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:14:20,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:20,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:20,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:20,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:20,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:14:20,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:14:20,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 387 [2020-10-26 23:14:20,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:20,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:14:20,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:14:20,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-26 23:14:20,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:14:20,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 23:14:20,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:20,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:21,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:21,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 23:14:21,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:14:21,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-26 23:14:21,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:21,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:14:21,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:14:21,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 23:14:21,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:14:21,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2020-10-26 23:14:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:21,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:21,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:21,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 23:14:21,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:14:21,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 23:14:21,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:21,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:14:21,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-26 23:14:21,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:14:21,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:14:21,397 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 113 proven. 130 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 23:14:21,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324837113] [2020-10-26 23:14:21,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:14:21,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 23:14:21,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944463990] [2020-10-26 23:14:21,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:14:21,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:14:21,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:14:21,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:14:21,401 INFO L87 Difference]: Start difference. First operand 17813 states and 25830 transitions. Second operand 8 states. [2020-10-26 23:14:21,599 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 66