/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:32:03,550 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:32:03,552 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:32:03,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:32:03,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:32:03,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:32:03,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:32:03,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:32:03,576 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:32:03,576 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:32:03,577 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:32:03,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:32:03,578 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:32:03,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:32:03,579 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:32:03,580 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:32:03,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:32:03,581 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:32:03,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:32:03,584 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:32:03,587 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:32:03,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:32:03,589 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:32:03,589 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:32:03,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 23:32:03,592 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 23:32:03,592 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 23:32:03,593 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 23:32:03,593 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 23:32:03,594 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 23:32:03,594 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:32:03,595 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:32:03,595 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:32:03,596 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:32:03,596 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:32:03,597 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:32:03,597 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:32:03,597 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:32:03,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:32:03,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:32:03,606 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:32:03,607 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 23:32:03,636 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:32:03,636 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:32:03,637 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:32:03,637 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:32:03,637 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:32:03,637 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:32:03,637 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:32:03,638 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:32:03,638 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:32:03,638 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:32:03,638 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:32:03,638 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:32:03,638 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:32:03,639 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:32:03,639 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:32:03,639 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:32:03,639 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:32:03,639 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:32:03,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:32:03,639 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:32:03,639 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:32:03,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:32:03,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:32:03,640 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:32:03,640 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:32:03,640 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:32:03,640 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:32:03,640 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:32:03,640 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:32:03,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:32:03,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:32:03,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:32:03,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:32:03,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:32:03,641 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:32:03,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:32:03,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:32:03,641 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:32:03,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:32:03,641 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:32:03,641 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:32:03,641 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:32:03,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:32:03,816 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:32:03,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:32:03,818 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:32:03,819 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:32:03,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c [2023-03-31 23:32:04,815 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:32:05,054 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:32:05,055 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c [2023-03-31 23:32:05,084 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8af4eb3ce/06b370b0930f4ee8b0343ecd82e5d3e1/FLAG0cc814128 [2023-03-31 23:32:05,098 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8af4eb3ce/06b370b0930f4ee8b0343ecd82e5d3e1 [2023-03-31 23:32:05,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:32:05,101 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:32:05,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:32:05,102 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:32:05,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:32:05,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:32:05" (1/1) ... [2023-03-31 23:32:05,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62f316ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:32:05, skipping insertion in model container [2023-03-31 23:32:05,107 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:32:05" (1/1) ... [2023-03-31 23:32:05,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:32:05,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:32:05,531 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c[71521,71534] [2023-03-31 23:32:05,545 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:32:05,559 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:32:05,652 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c[71521,71534] [2023-03-31 23:32:05,653 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:32:05,676 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:32:05,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:32:05 WrapperNode [2023-03-31 23:32:05,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:32:05,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:32:05,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:32:05,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:32:05,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:32:05" (1/1) ... [2023-03-31 23:32:05,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:32:05" (1/1) ... [2023-03-31 23:32:05,738 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:32:05" (1/1) ... [2023-03-31 23:32:05,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:32:05" (1/1) ... [2023-03-31 23:32:05,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:32:05" (1/1) ... [2023-03-31 23:32:05,795 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:32:05" (1/1) ... [2023-03-31 23:32:05,801 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:32:05" (1/1) ... [2023-03-31 23:32:05,809 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:32:05" (1/1) ... [2023-03-31 23:32:05,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:32:05,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:32:05,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:32:05,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:32:05,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:32:05" (1/1) ... [2023-03-31 23:32:05,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:32:05,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:32:05,890 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 23:32:05,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 23:32:05,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:32:05,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:32:05,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-03-31 23:32:05,916 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:32:05,920 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-03-31 23:32:05,920 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-03-31 23:32:05,920 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-03-31 23:32:05,920 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-03-31 23:32:05,920 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-03-31 23:32:05,920 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-03-31 23:32:05,920 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-03-31 23:32:05,920 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-03-31 23:32:05,920 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-03-31 23:32:05,920 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-03-31 23:32:05,921 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-03-31 23:32:05,921 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-03-31 23:32:05,921 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-03-31 23:32:05,921 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-03-31 23:32:05,921 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-03-31 23:32:05,921 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-03-31 23:32:05,921 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-03-31 23:32:05,921 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-03-31 23:32:05,921 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-03-31 23:32:05,921 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-03-31 23:32:05,921 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:32:05,921 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-03-31 23:32:05,921 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-03-31 23:32:05,921 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-03-31 23:32:05,922 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-03-31 23:32:05,922 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-03-31 23:32:05,922 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-03-31 23:32:05,922 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-03-31 23:32:05,922 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-03-31 23:32:05,922 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-03-31 23:32:05,922 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-03-31 23:32:05,922 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-03-31 23:32:05,922 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-03-31 23:32:05,923 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-03-31 23:32:05,923 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-03-31 23:32:05,923 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-03-31 23:32:05,923 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-03-31 23:32:05,923 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-03-31 23:32:05,923 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-03-31 23:32:05,924 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-03-31 23:32:05,924 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-03-31 23:32:05,924 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-03-31 23:32:05,925 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-03-31 23:32:05,925 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-03-31 23:32:05,925 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-03-31 23:32:05,925 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-03-31 23:32:05,925 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-03-31 23:32:05,925 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2023-03-31 23:32:05,925 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-03-31 23:32:05,926 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-03-31 23:32:05,926 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-03-31 23:32:05,927 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-03-31 23:32:05,927 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-03-31 23:32:05,927 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-03-31 23:32:05,927 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-03-31 23:32:05,928 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-03-31 23:32:05,928 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-03-31 23:32:05,928 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-03-31 23:32:05,928 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-03-31 23:32:05,928 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2023-03-31 23:32:05,928 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-03-31 23:32:05,928 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-03-31 23:32:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-03-31 23:32:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-03-31 23:32:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-03-31 23:32:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-03-31 23:32:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-03-31 23:32:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-03-31 23:32:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2023-03-31 23:32:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-03-31 23:32:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2023-03-31 23:32:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-03-31 23:32:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-03-31 23:32:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-03-31 23:32:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2023-03-31 23:32:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-03-31 23:32:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification14_spec__1 [2023-03-31 23:32:05,929 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:32:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:32:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:32:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:32:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 23:32:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-03-31 23:32:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-03-31 23:32:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-03-31 23:32:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-03-31 23:32:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-03-31 23:32:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-03-31 23:32:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-03-31 23:32:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-03-31 23:32:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 23:32:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-03-31 23:32:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-03-31 23:32:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-03-31 23:32:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-03-31 23:32:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-03-31 23:32:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-03-31 23:32:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-03-31 23:32:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-03-31 23:32:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-03-31 23:32:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-03-31 23:32:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-03-31 23:32:05,933 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-03-31 23:32:05,933 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-03-31 23:32:05,933 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-03-31 23:32:05,933 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-03-31 23:32:05,933 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-03-31 23:32:05,933 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-03-31 23:32:05,933 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-03-31 23:32:05,933 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-03-31 23:32:05,933 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-03-31 23:32:05,933 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-03-31 23:32:05,933 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:32:05,934 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 23:32:05,934 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-03-31 23:32:05,934 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-03-31 23:32:05,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 23:32:05,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-03-31 23:32:05,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:32:05,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-03-31 23:32:05,940 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-03-31 23:32:05,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:32:05,940 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-03-31 23:32:05,940 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-03-31 23:32:05,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:32:05,940 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-03-31 23:32:05,940 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-03-31 23:32:05,940 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-03-31 23:32:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-03-31 23:32:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-03-31 23:32:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-03-31 23:32:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-03-31 23:32:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-03-31 23:32:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-03-31 23:32:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-03-31 23:32:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-03-31 23:32:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-03-31 23:32:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-03-31 23:32:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-03-31 23:32:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-03-31 23:32:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-03-31 23:32:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-03-31 23:32:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-03-31 23:32:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-03-31 23:32:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-03-31 23:32:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-03-31 23:32:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-03-31 23:32:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2023-03-31 23:32:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-03-31 23:32:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-03-31 23:32:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2023-03-31 23:32:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-03-31 23:32:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-03-31 23:32:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-03-31 23:32:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-03-31 23:32:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-03-31 23:32:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-03-31 23:32:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2023-03-31 23:32:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-03-31 23:32:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-03-31 23:32:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-03-31 23:32:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-03-31 23:32:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-03-31 23:32:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-03-31 23:32:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-03-31 23:32:05,943 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2023-03-31 23:32:05,943 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification14_spec__1 [2023-03-31 23:32:05,943 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2023-03-31 23:32:05,943 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-03-31 23:32:05,943 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-03-31 23:32:05,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:32:05,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:32:05,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:32:06,182 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:32:06,187 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:32:07,339 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:32:08,002 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:32:08,002 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-03-31 23:32:08,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:32:08 BoogieIcfgContainer [2023-03-31 23:32:08,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:32:08,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:32:08,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:32:08,010 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:32:08,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:32:05" (1/3) ... [2023-03-31 23:32:08,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23336262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:32:08, skipping insertion in model container [2023-03-31 23:32:08,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:32:05" (2/3) ... [2023-03-31 23:32:08,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23336262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:32:08, skipping insertion in model container [2023-03-31 23:32:08,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:32:08" (3/3) ... [2023-03-31 23:32:08,013 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product32.cil.c [2023-03-31 23:32:08,026 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:32:08,027 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:32:08,068 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:32:08,072 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@53d8c119, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:32:08,073 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:32:08,078 INFO L276 IsEmpty]: Start isEmpty. Operand has 587 states, 338 states have (on average 1.4497041420118344) internal successors, (490), 363 states have internal predecessors, (490), 181 states have call successors, (181), 56 states have call predecessors, (181), 56 states have return successors, (181), 175 states have call predecessors, (181), 181 states have call successors, (181) [2023-03-31 23:32:08,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-03-31 23:32:08,087 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:32:08,087 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:32:08,088 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:32:08,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:32:08,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1659262320, now seen corresponding path program 1 times [2023-03-31 23:32:08,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:32:08,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758562690] [2023-03-31 23:32:08,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:08,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:32:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:08,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:32:08,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:32:08,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758562690] [2023-03-31 23:32:08,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758562690] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:32:08,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:32:08,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 23:32:08,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071059454] [2023-03-31 23:32:08,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:32:09,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 23:32:09,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:32:09,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 23:32:09,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 23:32:09,024 INFO L87 Difference]: Start difference. First operand has 587 states, 338 states have (on average 1.4497041420118344) internal successors, (490), 363 states have internal predecessors, (490), 181 states have call successors, (181), 56 states have call predecessors, (181), 56 states have return successors, (181), 175 states have call predecessors, (181), 181 states have call successors, (181) Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-03-31 23:32:09,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:32:09,427 INFO L93 Difference]: Finished difference Result 1338 states and 1999 transitions. [2023-03-31 23:32:09,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 23:32:09,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 72 [2023-03-31 23:32:09,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:32:09,451 INFO L225 Difference]: With dead ends: 1338 [2023-03-31 23:32:09,451 INFO L226 Difference]: Without dead ends: 879 [2023-03-31 23:32:09,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 23:32:09,465 INFO L413 NwaCegarLoop]: 709 mSDtfsCounter, 640 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:32:09,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 1295 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:32:09,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2023-03-31 23:32:09,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 834. [2023-03-31 23:32:09,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 535 states have (on average 1.4990654205607477) internal successors, (802), 561 states have internal predecessors, (802), 218 states have call successors, (218), 85 states have call predecessors, (218), 80 states have return successors, (221), 200 states have call predecessors, (221), 212 states have call successors, (221) [2023-03-31 23:32:09,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1241 transitions. [2023-03-31 23:32:09,593 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1241 transitions. Word has length 72 [2023-03-31 23:32:09,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:32:09,594 INFO L495 AbstractCegarLoop]: Abstraction has 834 states and 1241 transitions. [2023-03-31 23:32:09,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-03-31 23:32:09,594 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1241 transitions. [2023-03-31 23:32:09,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-03-31 23:32:09,607 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:32:09,608 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:32:09,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 23:32:09,608 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:32:09,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:32:09,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1992832304, now seen corresponding path program 1 times [2023-03-31 23:32:09,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:32:09,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663114495] [2023-03-31 23:32:09,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:09,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:32:09,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:10,180 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-03-31 23:32:10,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:32:10,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663114495] [2023-03-31 23:32:10,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663114495] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:32:10,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:32:10,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 23:32:10,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591596992] [2023-03-31 23:32:10,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:32:10,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:32:10,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:32:10,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:32:10,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:32:10,184 INFO L87 Difference]: Start difference. First operand 834 states and 1241 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (30), 4 states have call predecessors, (30), 4 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2023-03-31 23:32:12,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:32:12,525 INFO L93 Difference]: Finished difference Result 2514 states and 3803 transitions. [2023-03-31 23:32:12,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 23:32:12,525 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (30), 4 states have call predecessors, (30), 4 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) Word has length 120 [2023-03-31 23:32:12,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:32:12,534 INFO L225 Difference]: With dead ends: 2514 [2023-03-31 23:32:12,535 INFO L226 Difference]: Without dead ends: 1711 [2023-03-31 23:32:12,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:32:12,541 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 1245 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 3298 mSolverCounterSat, 504 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1350 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 3802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 504 IncrementalHoareTripleChecker+Valid, 3298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:32:12,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1350 Valid, 585 Invalid, 3802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [504 Valid, 3298 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-03-31 23:32:12,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2023-03-31 23:32:12,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1649. [2023-03-31 23:32:12,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1066 states have (on average 1.5009380863039399) internal successors, (1600), 1117 states have internal predecessors, (1600), 420 states have call successors, (420), 161 states have call predecessors, (420), 162 states have return successors, (465), 396 states have call predecessors, (465), 412 states have call successors, (465) [2023-03-31 23:32:12,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2485 transitions. [2023-03-31 23:32:12,629 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2485 transitions. Word has length 120 [2023-03-31 23:32:12,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:32:12,629 INFO L495 AbstractCegarLoop]: Abstraction has 1649 states and 2485 transitions. [2023-03-31 23:32:12,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (30), 4 states have call predecessors, (30), 4 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2023-03-31 23:32:12,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2485 transitions. [2023-03-31 23:32:12,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-03-31 23:32:12,632 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:32:12,632 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:32:12,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 23:32:12,633 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:32:12,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:32:12,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1833514407, now seen corresponding path program 1 times [2023-03-31 23:32:12,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:32:12,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718455437] [2023-03-31 23:32:12,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:12,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:32:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:13,156 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-03-31 23:32:13,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:32:13,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718455437] [2023-03-31 23:32:13,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718455437] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:32:13,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75911970] [2023-03-31 23:32:13,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:13,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:32:13,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:32:13,159 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:32:13,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 23:32:13,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:13,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 2517 conjuncts, 16 conjunts are in the unsatisfiable core [2023-03-31 23:32:13,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:32:13,754 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 23:32:13,754 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:32:13,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75911970] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:32:13,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:32:13,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2023-03-31 23:32:13,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110343951] [2023-03-31 23:32:13,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:32:13,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 23:32:13,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:32:13,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 23:32:13,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-03-31 23:32:13,756 INFO L87 Difference]: Start difference. First operand 1649 states and 2485 transitions. Second operand has 6 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2023-03-31 23:32:14,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:32:14,244 INFO L93 Difference]: Finished difference Result 3567 states and 5358 transitions. [2023-03-31 23:32:14,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 23:32:14,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 123 [2023-03-31 23:32:14,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:32:14,253 INFO L225 Difference]: With dead ends: 3567 [2023-03-31 23:32:14,253 INFO L226 Difference]: Without dead ends: 1948 [2023-03-31 23:32:14,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-03-31 23:32:14,260 INFO L413 NwaCegarLoop]: 724 mSDtfsCounter, 411 mSDsluCounter, 2338 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 3062 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 23:32:14,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 3062 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 23:32:14,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2023-03-31 23:32:14,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1932. [2023-03-31 23:32:14,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1230 states have (on average 1.4577235772357724) internal successors, (1793), 1278 states have internal predecessors, (1793), 491 states have call successors, (491), 207 states have call predecessors, (491), 210 states have return successors, (552), 473 states have call predecessors, (552), 481 states have call successors, (552) [2023-03-31 23:32:14,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 2836 transitions. [2023-03-31 23:32:14,337 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 2836 transitions. Word has length 123 [2023-03-31 23:32:14,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:32:14,338 INFO L495 AbstractCegarLoop]: Abstraction has 1932 states and 2836 transitions. [2023-03-31 23:32:14,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2023-03-31 23:32:14,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 2836 transitions. [2023-03-31 23:32:14,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-03-31 23:32:14,340 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:32:14,340 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:32:14,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 23:32:14,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:32:14,548 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:32:14,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:32:14,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1655132886, now seen corresponding path program 1 times [2023-03-31 23:32:14,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:32:14,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514259443] [2023-03-31 23:32:14,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:14,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:32:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:15,088 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-03-31 23:32:15,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:32:15,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514259443] [2023-03-31 23:32:15,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514259443] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:32:15,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:32:15,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-03-31 23:32:15,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908474132] [2023-03-31 23:32:15,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:32:15,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 23:32:15,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:32:15,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 23:32:15,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-03-31 23:32:15,093 INFO L87 Difference]: Start difference. First operand 1932 states and 2836 transitions. Second operand has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) [2023-03-31 23:32:17,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:32:17,446 INFO L93 Difference]: Finished difference Result 2111 states and 3118 transitions. [2023-03-31 23:32:17,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 23:32:17,447 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) Word has length 124 [2023-03-31 23:32:17,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:32:17,467 INFO L225 Difference]: With dead ends: 2111 [2023-03-31 23:32:17,468 INFO L226 Difference]: Without dead ends: 2108 [2023-03-31 23:32:17,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-03-31 23:32:17,469 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 1374 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 3897 mSolverCounterSat, 828 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1387 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 4725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 828 IncrementalHoareTripleChecker+Valid, 3897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:32:17,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1387 Valid, 985 Invalid, 4725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [828 Valid, 3897 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-03-31 23:32:17,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2023-03-31 23:32:17,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 2028. [2023-03-31 23:32:17,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 1286 states have (on average 1.4595645412130638) internal successors, (1877), 1346 states have internal predecessors, (1877), 527 states have call successors, (527), 207 states have call predecessors, (527), 214 states have return successors, (591), 507 states have call predecessors, (591), 517 states have call successors, (591) [2023-03-31 23:32:17,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 2995 transitions. [2023-03-31 23:32:17,560 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 2995 transitions. Word has length 124 [2023-03-31 23:32:17,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:32:17,560 INFO L495 AbstractCegarLoop]: Abstraction has 2028 states and 2995 transitions. [2023-03-31 23:32:17,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) [2023-03-31 23:32:17,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 2995 transitions. [2023-03-31 23:32:17,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-03-31 23:32:17,564 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:32:17,564 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:32:17,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 23:32:17,564 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:32:17,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:32:17,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1018514541, now seen corresponding path program 1 times [2023-03-31 23:32:17,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:32:17,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280140971] [2023-03-31 23:32:17,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:17,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:32:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-03-31 23:32:17,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:32:17,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280140971] [2023-03-31 23:32:17,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280140971] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:32:17,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:32:17,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 23:32:17,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881576720] [2023-03-31 23:32:17,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:32:17,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:32:17,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:32:17,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:32:17,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:32:17,758 INFO L87 Difference]: Start difference. First operand 2028 states and 2995 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2023-03-31 23:32:17,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:32:17,915 INFO L93 Difference]: Finished difference Result 4049 states and 6027 transitions. [2023-03-31 23:32:17,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:32:17,916 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) Word has length 160 [2023-03-31 23:32:17,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:32:17,930 INFO L225 Difference]: With dead ends: 4049 [2023-03-31 23:32:17,930 INFO L226 Difference]: Without dead ends: 2052 [2023-03-31 23:32:17,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:32:17,939 INFO L413 NwaCegarLoop]: 629 mSDtfsCounter, 10 mSDsluCounter, 1866 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2495 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:32:17,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 2495 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:32:17,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2023-03-31 23:32:18,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 2052. [2023-03-31 23:32:18,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 1304 states have (on average 1.4532208588957056) internal successors, (1895), 1364 states have internal predecessors, (1895), 527 states have call successors, (527), 207 states have call predecessors, (527), 220 states have return successors, (597), 513 states have call predecessors, (597), 517 states have call successors, (597) [2023-03-31 23:32:18,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 3019 transitions. [2023-03-31 23:32:18,081 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 3019 transitions. Word has length 160 [2023-03-31 23:32:18,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:32:18,082 INFO L495 AbstractCegarLoop]: Abstraction has 2052 states and 3019 transitions. [2023-03-31 23:32:18,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2023-03-31 23:32:18,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 3019 transitions. [2023-03-31 23:32:18,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-03-31 23:32:18,086 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:32:18,086 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:32:18,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 23:32:18,087 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:32:18,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:32:18,088 INFO L85 PathProgramCache]: Analyzing trace with hash 814969829, now seen corresponding path program 1 times [2023-03-31 23:32:18,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:32:18,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199742571] [2023-03-31 23:32:18,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:18,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:32:18,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:18,333 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-03-31 23:32:18,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:32:18,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199742571] [2023-03-31 23:32:18,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199742571] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:32:18,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200400562] [2023-03-31 23:32:18,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:18,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:32:18,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:32:18,335 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:32:18,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 23:32:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:18,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 2863 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 23:32:18,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:32:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-03-31 23:32:18,815 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:32:18,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200400562] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:32:18,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:32:18,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-03-31 23:32:18,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603877027] [2023-03-31 23:32:18,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:32:18,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:32:18,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:32:18,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:32:18,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-03-31 23:32:18,816 INFO L87 Difference]: Start difference. First operand 2052 states and 3019 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2023-03-31 23:32:19,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:32:19,082 INFO L93 Difference]: Finished difference Result 4229 states and 6366 transitions. [2023-03-31 23:32:19,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:32:19,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 169 [2023-03-31 23:32:19,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:32:19,092 INFO L225 Difference]: With dead ends: 4229 [2023-03-31 23:32:19,092 INFO L226 Difference]: Without dead ends: 2208 [2023-03-31 23:32:19,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-03-31 23:32:19,100 INFO L413 NwaCegarLoop]: 563 mSDtfsCounter, 213 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:32:19,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1665 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:32:19,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2023-03-31 23:32:19,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2208. [2023-03-31 23:32:19,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 1456 states have (on average 1.5020604395604396) internal successors, (2187), 1516 states have internal predecessors, (2187), 527 states have call successors, (527), 211 states have call predecessors, (527), 224 states have return successors, (597), 513 states have call predecessors, (597), 517 states have call successors, (597) [2023-03-31 23:32:19,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 3311 transitions. [2023-03-31 23:32:19,238 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 3311 transitions. Word has length 169 [2023-03-31 23:32:19,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:32:19,238 INFO L495 AbstractCegarLoop]: Abstraction has 2208 states and 3311 transitions. [2023-03-31 23:32:19,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2023-03-31 23:32:19,239 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 3311 transitions. [2023-03-31 23:32:19,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-03-31 23:32:19,243 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:32:19,243 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:32:19,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 23:32:19,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-03-31 23:32:19,454 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:32:19,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:32:19,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1505407724, now seen corresponding path program 1 times [2023-03-31 23:32:19,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:32:19,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141325549] [2023-03-31 23:32:19,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:19,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:32:19,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:19,599 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-03-31 23:32:19,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:32:19,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141325549] [2023-03-31 23:32:19,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141325549] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:32:19,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33953931] [2023-03-31 23:32:19,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:19,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:32:19,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:32:19,601 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:32:19,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 23:32:20,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:20,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 2868 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 23:32:20,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:32:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-03-31 23:32:20,103 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:32:20,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33953931] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:32:20,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:32:20,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-03-31 23:32:20,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541884437] [2023-03-31 23:32:20,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:32:20,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:32:20,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:32:20,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:32:20,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-31 23:32:20,105 INFO L87 Difference]: Start difference. First operand 2208 states and 3311 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2023-03-31 23:32:20,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:32:20,366 INFO L93 Difference]: Finished difference Result 4541 states and 6946 transitions. [2023-03-31 23:32:20,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:32:20,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 174 [2023-03-31 23:32:20,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:32:20,377 INFO L225 Difference]: With dead ends: 4541 [2023-03-31 23:32:20,377 INFO L226 Difference]: Without dead ends: 2364 [2023-03-31 23:32:20,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:32:20,386 INFO L413 NwaCegarLoop]: 563 mSDtfsCounter, 211 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:32:20,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1665 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:32:20,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2023-03-31 23:32:20,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 2364. [2023-03-31 23:32:20,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 1608 states have (on average 1.5416666666666667) internal successors, (2479), 1668 states have internal predecessors, (2479), 527 states have call successors, (527), 215 states have call predecessors, (527), 228 states have return successors, (597), 513 states have call predecessors, (597), 517 states have call successors, (597) [2023-03-31 23:32:20,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 3603 transitions. [2023-03-31 23:32:20,520 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 3603 transitions. Word has length 174 [2023-03-31 23:32:20,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:32:20,520 INFO L495 AbstractCegarLoop]: Abstraction has 2364 states and 3603 transitions. [2023-03-31 23:32:20,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2023-03-31 23:32:20,520 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 3603 transitions. [2023-03-31 23:32:20,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-03-31 23:32:20,524 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:32:20,524 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:32:20,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 23:32:20,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:32:20,725 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:32:20,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:32:20,726 INFO L85 PathProgramCache]: Analyzing trace with hash 10962436, now seen corresponding path program 1 times [2023-03-31 23:32:20,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:32:20,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494431808] [2023-03-31 23:32:20,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:20,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:32:20,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-03-31 23:32:20,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:32:20,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494431808] [2023-03-31 23:32:20,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494431808] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:32:20,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251635824] [2023-03-31 23:32:20,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:20,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:32:20,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:32:20,866 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:32:20,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 23:32:21,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:21,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 2872 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 23:32:21,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:32:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-03-31 23:32:21,355 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:32:21,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251635824] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:32:21,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:32:21,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-03-31 23:32:21,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382547910] [2023-03-31 23:32:21,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:32:21,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:32:21,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:32:21,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:32:21,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-31 23:32:21,357 INFO L87 Difference]: Start difference. First operand 2364 states and 3603 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2023-03-31 23:32:21,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:32:21,636 INFO L93 Difference]: Finished difference Result 4853 states and 7526 transitions. [2023-03-31 23:32:21,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:32:21,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 178 [2023-03-31 23:32:21,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:32:21,649 INFO L225 Difference]: With dead ends: 4853 [2023-03-31 23:32:21,649 INFO L226 Difference]: Without dead ends: 2520 [2023-03-31 23:32:21,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:32:21,660 INFO L413 NwaCegarLoop]: 563 mSDtfsCounter, 209 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:32:21,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1665 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:32:21,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2023-03-31 23:32:21,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 2520. [2023-03-31 23:32:21,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2520 states, 1760 states have (on average 1.5744318181818182) internal successors, (2771), 1820 states have internal predecessors, (2771), 527 states have call successors, (527), 219 states have call predecessors, (527), 232 states have return successors, (597), 513 states have call predecessors, (597), 517 states have call successors, (597) [2023-03-31 23:32:21,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 3895 transitions. [2023-03-31 23:32:21,758 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 3895 transitions. Word has length 178 [2023-03-31 23:32:21,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:32:21,758 INFO L495 AbstractCegarLoop]: Abstraction has 2520 states and 3895 transitions. [2023-03-31 23:32:21,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2023-03-31 23:32:21,759 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 3895 transitions. [2023-03-31 23:32:21,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-03-31 23:32:21,763 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:32:21,763 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:32:21,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 23:32:21,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:32:21,970 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:32:21,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:32:21,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1214431995, now seen corresponding path program 1 times [2023-03-31 23:32:21,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:32:21,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042103795] [2023-03-31 23:32:21,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:21,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:32:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-03-31 23:32:22,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:32:22,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042103795] [2023-03-31 23:32:22,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042103795] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:32:22,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087806250] [2023-03-31 23:32:22,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:22,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:32:22,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:32:22,151 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:32:22,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 23:32:22,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:22,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 2875 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 23:32:22,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:32:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-03-31 23:32:22,667 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:32:22,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087806250] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:32:22,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:32:22,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-03-31 23:32:22,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59832569] [2023-03-31 23:32:22,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:32:22,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:32:22,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:32:22,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:32:22,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-31 23:32:22,670 INFO L87 Difference]: Start difference. First operand 2520 states and 3895 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2023-03-31 23:32:22,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:32:22,919 INFO L93 Difference]: Finished difference Result 5165 states and 8106 transitions. [2023-03-31 23:32:22,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:32:22,920 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 181 [2023-03-31 23:32:22,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:32:22,934 INFO L225 Difference]: With dead ends: 5165 [2023-03-31 23:32:22,934 INFO L226 Difference]: Without dead ends: 2676 [2023-03-31 23:32:22,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:32:22,944 INFO L413 NwaCegarLoop]: 563 mSDtfsCounter, 207 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:32:22,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1665 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:32:22,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2023-03-31 23:32:23,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 2676. [2023-03-31 23:32:23,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2676 states, 1912 states have (on average 1.6019874476987448) internal successors, (3063), 1972 states have internal predecessors, (3063), 527 states have call successors, (527), 223 states have call predecessors, (527), 236 states have return successors, (597), 513 states have call predecessors, (597), 517 states have call successors, (597) [2023-03-31 23:32:23,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 4187 transitions. [2023-03-31 23:32:23,050 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 4187 transitions. Word has length 181 [2023-03-31 23:32:23,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:32:23,051 INFO L495 AbstractCegarLoop]: Abstraction has 2676 states and 4187 transitions. [2023-03-31 23:32:23,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2023-03-31 23:32:23,052 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 4187 transitions. [2023-03-31 23:32:23,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-03-31 23:32:23,058 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:32:23,058 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:32:23,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 23:32:23,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:32:23,265 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:32:23,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:32:23,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1916750035, now seen corresponding path program 1 times [2023-03-31 23:32:23,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:32:23,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781881023] [2023-03-31 23:32:23,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:23,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:32:23,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-03-31 23:32:23,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:32:23,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781881023] [2023-03-31 23:32:23,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781881023] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:32:23,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638570272] [2023-03-31 23:32:23,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:23,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:32:23,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:32:23,760 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:32:23,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 23:32:24,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:24,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 2871 conjuncts, 17 conjunts are in the unsatisfiable core [2023-03-31 23:32:24,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:32:24,631 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-03-31 23:32:24,631 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:32:24,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638570272] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:32:24,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:32:24,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2023-03-31 23:32:24,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074985505] [2023-03-31 23:32:24,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:32:24,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 23:32:24,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:32:24,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 23:32:24,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-03-31 23:32:24,635 INFO L87 Difference]: Start difference. First operand 2676 states and 4187 transitions. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 7 states have internal predecessors, (92), 7 states have call successors, (38), 6 states have call predecessors, (38), 5 states have return successors, (31), 5 states have call predecessors, (31), 7 states have call successors, (31) [2023-03-31 23:32:28,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:32:28,248 INFO L93 Difference]: Finished difference Result 7249 states and 11541 transitions. [2023-03-31 23:32:28,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 23:32:28,249 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 7 states have internal predecessors, (92), 7 states have call successors, (38), 6 states have call predecessors, (38), 5 states have return successors, (31), 5 states have call predecessors, (31), 7 states have call successors, (31) Word has length 183 [2023-03-31 23:32:28,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:32:28,270 INFO L225 Difference]: With dead ends: 7249 [2023-03-31 23:32:28,270 INFO L226 Difference]: Without dead ends: 4603 [2023-03-31 23:32:28,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-03-31 23:32:28,278 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 3017 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 4566 mSolverCounterSat, 1404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3186 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 5970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1404 IncrementalHoareTripleChecker+Valid, 4566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:32:28,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3186 Valid, 1036 Invalid, 5970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1404 Valid, 4566 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-03-31 23:32:28,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4603 states. [2023-03-31 23:32:28,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4603 to 4346. [2023-03-31 23:32:28,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4346 states, 3035 states have (on average 1.5947281713344317) internal successors, (4840), 3157 states have internal predecessors, (4840), 935 states have call successors, (935), 337 states have call predecessors, (935), 375 states have return successors, (1122), 904 states have call predecessors, (1122), 922 states have call successors, (1122) [2023-03-31 23:32:28,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4346 states to 4346 states and 6897 transitions. [2023-03-31 23:32:28,531 INFO L78 Accepts]: Start accepts. Automaton has 4346 states and 6897 transitions. Word has length 183 [2023-03-31 23:32:28,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:32:28,532 INFO L495 AbstractCegarLoop]: Abstraction has 4346 states and 6897 transitions. [2023-03-31 23:32:28,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 7 states have internal predecessors, (92), 7 states have call successors, (38), 6 states have call predecessors, (38), 5 states have return successors, (31), 5 states have call predecessors, (31), 7 states have call successors, (31) [2023-03-31 23:32:28,532 INFO L276 IsEmpty]: Start isEmpty. Operand 4346 states and 6897 transitions. [2023-03-31 23:32:28,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-03-31 23:32:28,537 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:32:28,537 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:32:28,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 23:32:28,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:32:28,745 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:32:28,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:32:28,746 INFO L85 PathProgramCache]: Analyzing trace with hash 97071514, now seen corresponding path program 1 times [2023-03-31 23:32:28,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:32:28,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743402937] [2023-03-31 23:32:28,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:28,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:32:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:29,139 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-03-31 23:32:29,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:32:29,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743402937] [2023-03-31 23:32:29,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743402937] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:32:29,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411063437] [2023-03-31 23:32:29,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:29,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:32:29,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:32:29,145 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:32:29,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 23:32:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:29,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 2872 conjuncts, 39 conjunts are in the unsatisfiable core [2023-03-31 23:32:29,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:32:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-03-31 23:32:29,729 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:32:29,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411063437] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:32:29,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:32:29,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [9] total 12 [2023-03-31 23:32:29,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780746201] [2023-03-31 23:32:29,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:32:29,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 23:32:29,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:32:29,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 23:32:29,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:32:29,731 INFO L87 Difference]: Start difference. First operand 4346 states and 6897 transitions. Second operand has 11 states, 11 states have (on average 9.181818181818182) internal successors, (101), 11 states have internal predecessors, (101), 7 states have call successors, (38), 5 states have call predecessors, (38), 7 states have return successors, (31), 8 states have call predecessors, (31), 7 states have call successors, (31) [2023-03-31 23:32:33,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:32:33,432 INFO L93 Difference]: Finished difference Result 11748 states and 19186 transitions. [2023-03-31 23:32:33,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-03-31 23:32:33,433 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.181818181818182) internal successors, (101), 11 states have internal predecessors, (101), 7 states have call successors, (38), 5 states have call predecessors, (38), 7 states have return successors, (31), 8 states have call predecessors, (31), 7 states have call successors, (31) Word has length 185 [2023-03-31 23:32:33,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:32:33,457 INFO L225 Difference]: With dead ends: 11748 [2023-03-31 23:32:33,457 INFO L226 Difference]: Without dead ends: 6738 [2023-03-31 23:32:33,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2023-03-31 23:32:33,475 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 2010 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 6640 mSolverCounterSat, 1030 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2154 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 7670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1030 IncrementalHoareTripleChecker+Valid, 6640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:32:33,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2154 Valid, 1192 Invalid, 7670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1030 Valid, 6640 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-03-31 23:32:33,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6738 states. [2023-03-31 23:32:33,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6738 to 6578. [2023-03-31 23:32:33,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6578 states, 4319 states have (on average 1.487149803195184) internal successors, (6423), 4544 states have internal predecessors, (6423), 1615 states have call successors, (1615), 564 states have call predecessors, (1615), 643 states have return successors, (2091), 1562 states have call predecessors, (2091), 1597 states have call successors, (2091) [2023-03-31 23:32:33,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6578 states to 6578 states and 10129 transitions. [2023-03-31 23:32:33,862 INFO L78 Accepts]: Start accepts. Automaton has 6578 states and 10129 transitions. Word has length 185 [2023-03-31 23:32:33,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:32:33,863 INFO L495 AbstractCegarLoop]: Abstraction has 6578 states and 10129 transitions. [2023-03-31 23:32:33,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.181818181818182) internal successors, (101), 11 states have internal predecessors, (101), 7 states have call successors, (38), 5 states have call predecessors, (38), 7 states have return successors, (31), 8 states have call predecessors, (31), 7 states have call successors, (31) [2023-03-31 23:32:33,863 INFO L276 IsEmpty]: Start isEmpty. Operand 6578 states and 10129 transitions. [2023-03-31 23:32:33,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-03-31 23:32:33,867 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:32:33,867 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:32:33,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-31 23:32:34,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:32:34,073 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:32:34,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:32:34,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1676592572, now seen corresponding path program 1 times [2023-03-31 23:32:34,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:32:34,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786145247] [2023-03-31 23:32:34,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:34,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:32:34,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:34,233 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-03-31 23:32:34,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:32:34,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786145247] [2023-03-31 23:32:34,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786145247] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:32:34,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:32:34,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 23:32:34,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285632891] [2023-03-31 23:32:34,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:32:34,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:32:34,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:32:34,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:32:34,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 23:32:34,236 INFO L87 Difference]: Start difference. First operand 6578 states and 10129 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-03-31 23:32:34,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:32:34,699 INFO L93 Difference]: Finished difference Result 13448 states and 21084 transitions. [2023-03-31 23:32:34,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:32:34,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 185 [2023-03-31 23:32:34,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:32:34,725 INFO L225 Difference]: With dead ends: 13448 [2023-03-31 23:32:34,725 INFO L226 Difference]: Without dead ends: 6806 [2023-03-31 23:32:34,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:32:34,748 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 99 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1678 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:32:34,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1678 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:32:34,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6806 states. [2023-03-31 23:32:35,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6806 to 6806. [2023-03-31 23:32:35,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6806 states, 4535 states have (on average 1.4434399117971335) internal successors, (6546), 4760 states have internal predecessors, (6546), 1615 states have call successors, (1615), 576 states have call predecessors, (1615), 655 states have return successors, (2091), 1562 states have call predecessors, (2091), 1597 states have call successors, (2091) [2023-03-31 23:32:35,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6806 states to 6806 states and 10252 transitions. [2023-03-31 23:32:35,162 INFO L78 Accepts]: Start accepts. Automaton has 6806 states and 10252 transitions. Word has length 185 [2023-03-31 23:32:35,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:32:35,163 INFO L495 AbstractCegarLoop]: Abstraction has 6806 states and 10252 transitions. [2023-03-31 23:32:35,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-03-31 23:32:35,163 INFO L276 IsEmpty]: Start isEmpty. Operand 6806 states and 10252 transitions. [2023-03-31 23:32:35,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2023-03-31 23:32:35,167 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:32:35,167 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:32:35,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-03-31 23:32:35,167 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:32:35,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:32:35,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1969223795, now seen corresponding path program 1 times [2023-03-31 23:32:35,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:32:35,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612993938] [2023-03-31 23:32:35,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:35,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:32:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-03-31 23:32:39,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:32:39,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612993938] [2023-03-31 23:32:39,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612993938] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:32:39,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992857311] [2023-03-31 23:32:39,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:39,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:32:39,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:32:39,020 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:32:39,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 23:32:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:39,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 2879 conjuncts, 58 conjunts are in the unsatisfiable core [2023-03-31 23:32:39,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:32:40,921 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-03-31 23:32:40,921 INFO L327 TraceCheckSpWp]: Computing backward predicates...