/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 OctagonDomain -i ../sv-benchmarks/c/product-lines/elevator_spec2_product09.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:46:23,623 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:46:23,625 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:46:23,653 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:46:23,653 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:46:23,655 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:46:23,657 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:46:23,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:46:23,660 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:46:23,663 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:46:23,665 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:46:23,666 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:46:23,666 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:46:23,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:46:23,668 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:46:23,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:46:23,669 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:46:23,670 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:46:23,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:46:23,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:46:23,675 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:46:23,676 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:46:23,677 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:46:23,677 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:46:23,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 23:46:23,690 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 23:46:23,690 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 23:46:23,691 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 23:46:23,691 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 23:46:23,691 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 23:46:23,692 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:46:23,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:46:23,693 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:46:23,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:46:23,694 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:46:23,694 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:46:23,694 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:46:23,694 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:46:23,694 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:46:23,695 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:46:23,695 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:46:23,696 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 [2023-04-02 23:46:23,717 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:46:23,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:46:23,718 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:46:23,718 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:46:23,718 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:46:23,719 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:46:23,719 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:46:23,719 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:46:23,719 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:46:23,719 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:46:23,720 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:46:23,720 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:46:23,720 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:46:23,720 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:46:23,720 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:46:23,720 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:46:23,720 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:46:23,720 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:46:23,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:46:23,721 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:46:23,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:46:23,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:46:23,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:46:23,721 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:46:23,721 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:46:23,721 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:46:23,722 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:46:23,722 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:46:23,722 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:46:23,722 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:46:23,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:46:23,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:46:23,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:46:23,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:46:23,722 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:46:23,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:46:23,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:46:23,723 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:46:23,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:46:23,723 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:46:23,723 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:46:23,723 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:46:23,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:46:23,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:46:23,890 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:46:23,891 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:46:23,891 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:46:23,892 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec2_product09.cil.c [2023-04-02 23:46:24,845 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:46:25,131 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:46:25,131 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product09.cil.c [2023-04-02 23:46:25,142 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b8cab830/d872273a74cd47398cf97c30d38bebe6/FLAGde8cd9f58 [2023-04-02 23:46:25,151 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b8cab830/d872273a74cd47398cf97c30d38bebe6 [2023-04-02 23:46:25,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:46:25,153 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:46:25,154 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:46:25,154 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:46:25,156 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:46:25,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:46:25" (1/1) ... [2023-04-02 23:46:25,157 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74a51e22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:46:25, skipping insertion in model container [2023-04-02 23:46:25,157 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:46:25" (1/1) ... [2023-04-02 23:46:25,161 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:46:25,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:46:25,378 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_spec2_product09.cil.c[28842,28855] [2023-04-02 23:46:25,466 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:46:25,484 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:46:25,527 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_spec2_product09.cil.c[28842,28855] [2023-04-02 23:46:25,565 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:46:25,582 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:46:25,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:46:25 WrapperNode [2023-04-02 23:46:25,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:46:25,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:46:25,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:46:25,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:46:25,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:46:25" (1/1) ... [2023-04-02 23:46:25,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:46:25" (1/1) ... [2023-04-02 23:46:25,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:46:25" (1/1) ... [2023-04-02 23:46:25,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:46:25" (1/1) ... [2023-04-02 23:46:25,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:46:25" (1/1) ... [2023-04-02 23:46:25,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:46:25" (1/1) ... [2023-04-02 23:46:25,698 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:46:25" (1/1) ... [2023-04-02 23:46:25,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:46:25" (1/1) ... [2023-04-02 23:46:25,723 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:46:25,723 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:46:25,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:46:25,724 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:46:25,724 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:46:25" (1/1) ... [2023-04-02 23:46:25,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:46:25,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:46:25,774 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) [2023-04-02 23:46:25,803 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 [2023-04-02 23:46:25,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:46:25,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:46:25,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-02 23:46:25,815 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:46:25,816 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-02 23:46:25,816 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-02 23:46:25,816 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-02 23:46:25,817 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-02 23:46:25,817 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-02 23:46:25,817 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-02 23:46:25,817 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-02 23:46:25,817 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-02 23:46:25,817 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-02 23:46:25,817 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-02 23:46:25,817 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-02 23:46:25,817 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-02 23:46:25,818 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-02 23:46:25,818 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-02 23:46:25,818 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-02 23:46:25,818 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-02 23:46:25,818 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:46:25,818 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-02 23:46:25,818 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-02 23:46:25,818 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-02 23:46:25,818 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2023-04-02 23:46:25,818 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2023-04-02 23:46:25,819 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__3 [2023-04-02 23:46:25,819 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__4 [2023-04-02 23:46:25,819 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-02 23:46:25,819 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-02 23:46:25,819 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-02 23:46:25,819 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-02 23:46:25,819 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-02 23:46:25,819 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-02 23:46:25,819 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-02 23:46:25,819 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-02 23:46:25,819 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-02 23:46:25,819 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-02 23:46:25,820 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-02 23:46:25,820 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-02 23:46:25,820 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-02 23:46:25,820 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-02 23:46:25,820 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-02 23:46:25,820 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-02 23:46:25,820 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-02 23:46:25,821 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-02 23:46:25,821 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-02 23:46:25,821 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-02 23:46:25,821 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-02 23:46:25,821 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-02 23:46:25,821 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-02 23:46:25,821 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-02 23:46:25,821 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-02 23:46:25,821 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-02 23:46:25,822 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-02 23:46:25,822 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-02 23:46:25,822 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-02 23:46:25,822 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-02 23:46:25,823 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-02 23:46:25,823 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-02 23:46:25,823 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-02 23:46:25,824 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-02 23:46:25,824 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-02 23:46:25,824 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-02 23:46:25,824 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-02 23:46:25,824 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-02 23:46:25,824 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-02 23:46:25,824 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-02 23:46:25,824 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-02 23:46:25,824 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-02 23:46:25,825 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-02 23:46:25,825 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-02 23:46:25,825 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-02 23:46:25,825 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-02 23:46:25,825 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:46:25,825 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:46:25,825 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:46:25,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:46:25,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 23:46:25,825 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 23:46:25,825 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-02 23:46:25,825 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-02 23:46:25,826 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-02 23:46:25,826 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-02 23:46:25,826 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-02 23:46:25,826 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-02 23:46:25,826 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-02 23:46:25,827 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-02 23:46:25,827 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-02 23:46:25,827 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-02 23:46:25,827 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-02 23:46:25,827 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-02 23:46:25,827 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-02 23:46:25,827 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-02 23:46:25,827 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-02 23:46:25,827 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-02 23:46:25,827 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-02 23:46:25,827 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-02 23:46:25,827 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-02 23:46:25,827 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-02 23:46:25,827 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-02 23:46:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-02 23:46:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2023-04-02 23:46:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__4 [2023-04-02 23:46:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-02 23:46:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-02 23:46:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-02 23:46:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-02 23:46:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-02 23:46:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:46:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-02 23:46:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-02 23:46:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-02 23:46:25,829 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-02 23:46:25,829 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-02 23:46:25,829 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2023-04-02 23:46:25,829 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__3 [2023-04-02 23:46:25,830 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-02 23:46:25,830 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-02 23:46:25,830 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-02 23:46:25,830 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-02 23:46:25,831 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-02 23:46:25,832 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-02 23:46:25,832 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-02 23:46:25,836 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-02 23:46:25,836 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-02 23:46:25,836 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-02 23:46:25,836 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-02 23:46:25,837 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-02 23:46:25,837 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-02 23:46:25,837 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-02 23:46:25,837 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-02 23:46:25,837 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-02 23:46:25,837 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-02 23:46:25,837 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-02 23:46:25,837 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-02 23:46:25,837 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-02 23:46:25,838 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-02 23:46:25,838 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-02 23:46:25,838 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-02 23:46:25,838 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-02 23:46:25,838 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-02 23:46:25,838 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-02 23:46:25,838 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 23:46:25,838 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 23:46:25,838 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-02 23:46:25,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 23:46:25,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 23:46:25,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:46:25,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 23:46:25,839 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-02 23:46:25,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:46:25,839 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-02 23:46:25,839 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-02 23:46:25,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:46:25,839 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-02 23:46:25,839 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-02 23:46:25,839 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-02 23:46:25,839 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-02 23:46:25,839 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-02 23:46:25,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:46:25,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:46:25,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:46:26,079 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:46:26,081 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:46:27,056 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:46:27,645 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:46:27,646 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-02 23:46:27,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:46:27 BoogieIcfgContainer [2023-04-02 23:46:27,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:46:27,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:46:27,650 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:46:27,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:46:27,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:46:25" (1/3) ... [2023-04-02 23:46:27,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e9851a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:46:27, skipping insertion in model container [2023-04-02 23:46:27,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:46:25" (2/3) ... [2023-04-02 23:46:27,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e9851a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:46:27, skipping insertion in model container [2023-04-02 23:46:27,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:46:27" (3/3) ... [2023-04-02 23:46:27,653 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product09.cil.c [2023-04-02 23:46:27,664 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:46:27,665 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:46:27,699 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:46:27,703 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;@7d8d49d8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:46:27,703 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:46:27,707 INFO L276 IsEmpty]: Start isEmpty. Operand has 537 states, 315 states have (on average 1.507936507936508) internal successors, (475), 342 states have internal predecessors, (475), 163 states have call successors, (163), 46 states have call predecessors, (163), 46 states have return successors, (163), 154 states have call predecessors, (163), 163 states have call successors, (163) [2023-04-02 23:46:27,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-02 23:46:27,719 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:46:27,719 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:46:27,720 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:46:27,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:46:27,723 INFO L85 PathProgramCache]: Analyzing trace with hash -838808011, now seen corresponding path program 1 times [2023-04-02 23:46:27,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:46:27,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566672393] [2023-04-02 23:46:27,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:46:27,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:46:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:46:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:46:28,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:46:28,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566672393] [2023-04-02 23:46:28,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566672393] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:46:28,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:46:28,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 23:46:28,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610110925] [2023-04-02 23:46:28,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:46:28,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 23:46:28,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:46:28,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 23:46:28,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 23:46:28,043 INFO L87 Difference]: Start difference. First operand has 537 states, 315 states have (on average 1.507936507936508) internal successors, (475), 342 states have internal predecessors, (475), 163 states have call successors, (163), 46 states have call predecessors, (163), 46 states have return successors, (163), 154 states have call predecessors, (163), 163 states have call successors, (163) Second operand has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2023-04-02 23:46:28,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:46:28,119 INFO L93 Difference]: Finished difference Result 440 states and 662 transitions. [2023-04-02 23:46:28,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 23:46:28,120 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 92 [2023-04-02 23:46:28,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:46:28,130 INFO L225 Difference]: With dead ends: 440 [2023-04-02 23:46:28,130 INFO L226 Difference]: Without dead ends: 406 [2023-04-02 23:46:28,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 23:46:28,134 INFO L413 NwaCegarLoop]: 585 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:46:28,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 585 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:46:28,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2023-04-02 23:46:28,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 406. [2023-04-02 23:46:28,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 259 states have (on average 1.555984555984556) internal successors, (403), 278 states have internal predecessors, (403), 108 states have call successors, (108), 42 states have call predecessors, (108), 38 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2023-04-02 23:46:28,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 611 transitions. [2023-04-02 23:46:28,177 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 611 transitions. Word has length 92 [2023-04-02 23:46:28,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:46:28,178 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 611 transitions. [2023-04-02 23:46:28,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2023-04-02 23:46:28,179 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 611 transitions. [2023-04-02 23:46:28,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-04-02 23:46:28,183 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:46:28,183 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:46:28,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 23:46:28,183 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:46:28,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:46:28,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1697168946, now seen corresponding path program 1 times [2023-04-02 23:46:28,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:46:28,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310943404] [2023-04-02 23:46:28,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:46:28,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:46:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:46:28,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:46:28,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:46:28,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310943404] [2023-04-02 23:46:28,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310943404] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:46:28,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:46:28,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 23:46:28,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031825881] [2023-04-02 23:46:28,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:46:28,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 23:46:28,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:46:28,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 23:46:28,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:46:28,497 INFO L87 Difference]: Start difference. First operand 406 states and 611 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (19), 4 states have call predecessors, (19), 2 states have call successors, (19) [2023-04-02 23:46:28,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:46:28,644 INFO L93 Difference]: Finished difference Result 809 states and 1249 transitions. [2023-04-02 23:46:28,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 23:46:28,644 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (19), 4 states have call predecessors, (19), 2 states have call successors, (19) Word has length 93 [2023-04-02 23:46:28,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:46:28,647 INFO L225 Difference]: With dead ends: 809 [2023-04-02 23:46:28,647 INFO L226 Difference]: Without dead ends: 445 [2023-04-02 23:46:28,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:46:28,650 INFO L413 NwaCegarLoop]: 590 mSDtfsCounter, 33 mSDsluCounter, 3521 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 4111 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:46:28,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 4111 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:46:28,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2023-04-02 23:46:28,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 410. [2023-04-02 23:46:28,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 262 states have (on average 1.549618320610687) internal successors, (406), 281 states have internal predecessors, (406), 108 states have call successors, (108), 42 states have call predecessors, (108), 39 states have return successors, (101), 98 states have call predecessors, (101), 100 states have call successors, (101) [2023-04-02 23:46:28,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 615 transitions. [2023-04-02 23:46:28,666 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 615 transitions. Word has length 93 [2023-04-02 23:46:28,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:46:28,667 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 615 transitions. [2023-04-02 23:46:28,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (19), 4 states have call predecessors, (19), 2 states have call successors, (19) [2023-04-02 23:46:28,667 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 615 transitions. [2023-04-02 23:46:28,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-04-02 23:46:28,669 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:46:28,669 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:46:28,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 23:46:28,670 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:46:28,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:46:28,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1129151491, now seen corresponding path program 1 times [2023-04-02 23:46:28,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:46:28,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793658424] [2023-04-02 23:46:28,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:46:28,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:46:28,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:46:29,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:46:29,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:46:29,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793658424] [2023-04-02 23:46:29,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793658424] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:46:29,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:46:29,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:46:29,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004003070] [2023-04-02 23:46:29,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:46:29,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:46:29,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:46:29,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:46:29,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:46:29,035 INFO L87 Difference]: Start difference. First operand 410 states and 615 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (24), 4 states have call predecessors, (24), 4 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2023-04-02 23:46:31,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:46:31,115 INFO L93 Difference]: Finished difference Result 1261 states and 1954 transitions. [2023-04-02 23:46:31,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 23:46:31,116 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (24), 4 states have call predecessors, (24), 4 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) Word has length 97 [2023-04-02 23:46:31,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:46:31,120 INFO L225 Difference]: With dead ends: 1261 [2023-04-02 23:46:31,120 INFO L226 Difference]: Without dead ends: 893 [2023-04-02 23:46:31,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-04-02 23:46:31,122 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 1678 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 3285 mSolverCounterSat, 491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1749 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 3776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 491 IncrementalHoareTripleChecker+Valid, 3285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-02 23:46:31,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1749 Valid, 606 Invalid, 3776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [491 Valid, 3285 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-02 23:46:31,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2023-04-02 23:46:31,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 866. [2023-04-02 23:46:31,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 582 states have (on average 1.5893470790378006) internal successors, (925), 617 states have internal predecessors, (925), 210 states have call successors, (210), 72 states have call predecessors, (210), 73 states have return successors, (210), 200 states have call predecessors, (210), 202 states have call successors, (210) [2023-04-02 23:46:31,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1345 transitions. [2023-04-02 23:46:31,163 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1345 transitions. Word has length 97 [2023-04-02 23:46:31,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:46:31,164 INFO L495 AbstractCegarLoop]: Abstraction has 866 states and 1345 transitions. [2023-04-02 23:46:31,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (24), 4 states have call predecessors, (24), 4 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2023-04-02 23:46:31,164 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1345 transitions. [2023-04-02 23:46:31,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-04-02 23:46:31,166 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:46:31,167 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:46:31,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 23:46:31,167 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:46:31,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:46:31,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1636905051, now seen corresponding path program 1 times [2023-04-02 23:46:31,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:46:31,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715307063] [2023-04-02 23:46:31,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:46:31,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:46:31,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:46:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:46:31,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:46:31,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715307063] [2023-04-02 23:46:31,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715307063] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:46:31,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:46:31,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 23:46:31,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226117309] [2023-04-02 23:46:31,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:46:31,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:46:31,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:46:31,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:46:31,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:46:31,334 INFO L87 Difference]: Start difference. First operand 866 states and 1345 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-04-02 23:46:31,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:46:31,445 INFO L93 Difference]: Finished difference Result 1371 states and 2142 transitions. [2023-04-02 23:46:31,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:46:31,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 101 [2023-04-02 23:46:31,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:46:31,449 INFO L225 Difference]: With dead ends: 1371 [2023-04-02 23:46:31,449 INFO L226 Difference]: Without dead ends: 888 [2023-04-02 23:46:31,451 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 [2023-04-02 23:46:31,451 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 7 mSDsluCounter, 1704 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2284 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:46:31,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2284 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:46:31,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2023-04-02 23:46:31,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 878. [2023-04-02 23:46:31,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 591 states have (on average 1.5803722504230118) internal successors, (934), 626 states have internal predecessors, (934), 210 states have call successors, (210), 72 states have call predecessors, (210), 76 states have return successors, (216), 203 states have call predecessors, (216), 202 states have call successors, (216) [2023-04-02 23:46:31,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1360 transitions. [2023-04-02 23:46:31,489 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1360 transitions. Word has length 101 [2023-04-02 23:46:31,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:46:31,489 INFO L495 AbstractCegarLoop]: Abstraction has 878 states and 1360 transitions. [2023-04-02 23:46:31,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-04-02 23:46:31,490 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1360 transitions. [2023-04-02 23:46:31,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-02 23:46:31,491 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:46:31,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:46:31,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 23:46:31,491 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:46:31,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:46:31,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1115655475, now seen corresponding path program 1 times [2023-04-02 23:46:31,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:46:31,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970117551] [2023-04-02 23:46:31,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:46:31,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:46:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:46:31,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:46:31,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:46:31,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970117551] [2023-04-02 23:46:31,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970117551] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:46:31,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:46:31,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 23:46:31,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118397872] [2023-04-02 23:46:31,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:46:31,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:46:31,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:46:31,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:46:31,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:46:31,572 INFO L87 Difference]: Start difference. First operand 878 states and 1360 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-04-02 23:46:31,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:46:31,720 INFO L93 Difference]: Finished difference Result 1632 states and 2570 transitions. [2023-04-02 23:46:31,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:46:31,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 105 [2023-04-02 23:46:31,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:46:31,724 INFO L225 Difference]: With dead ends: 1632 [2023-04-02 23:46:31,724 INFO L226 Difference]: Without dead ends: 1041 [2023-04-02 23:46:31,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:46:31,726 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 593 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:46:31,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [593 Valid, 1098 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:46:31,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2023-04-02 23:46:31,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 1020. [2023-04-02 23:46:31,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 699 states have (on average 1.5851216022889842) internal successors, (1108), 740 states have internal predecessors, (1108), 233 states have call successors, (233), 83 states have call predecessors, (233), 87 states have return successors, (247), 220 states have call predecessors, (247), 225 states have call successors, (247) [2023-04-02 23:46:31,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1588 transitions. [2023-04-02 23:46:31,762 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 1588 transitions. Word has length 105 [2023-04-02 23:46:31,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:46:31,763 INFO L495 AbstractCegarLoop]: Abstraction has 1020 states and 1588 transitions. [2023-04-02 23:46:31,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-04-02 23:46:31,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 1588 transitions. [2023-04-02 23:46:31,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-02 23:46:31,764 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:46:31,764 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:46:31,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 23:46:31,764 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:46:31,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:46:31,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1060776228, now seen corresponding path program 1 times [2023-04-02 23:46:31,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:46:31,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465475572] [2023-04-02 23:46:31,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:46:31,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:46:31,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:46:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:46:31,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:46:31,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465475572] [2023-04-02 23:46:31,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465475572] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:46:31,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:46:31,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 23:46:31,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488433403] [2023-04-02 23:46:31,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:46:31,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:46:31,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:46:31,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:46:31,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:46:31,869 INFO L87 Difference]: Start difference. First operand 1020 states and 1588 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-04-02 23:46:31,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:46:31,997 INFO L93 Difference]: Finished difference Result 1950 states and 3094 transitions. [2023-04-02 23:46:31,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:46:31,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 107 [2023-04-02 23:46:31,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:46:32,002 INFO L225 Difference]: With dead ends: 1950 [2023-04-02 23:46:32,002 INFO L226 Difference]: Without dead ends: 1217 [2023-04-02 23:46:32,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:46:32,004 INFO L413 NwaCegarLoop]: 589 mSDtfsCounter, 140 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:46:32,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 1067 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:46:32,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2023-04-02 23:46:32,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 1211. [2023-04-02 23:46:32,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 847 states have (on average 1.576151121605667) internal successors, (1335), 895 states have internal predecessors, (1335), 261 states have call successors, (261), 97 states have call predecessors, (261), 102 states have return successors, (287), 242 states have call predecessors, (287), 253 states have call successors, (287) [2023-04-02 23:46:32,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1883 transitions. [2023-04-02 23:46:32,048 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1883 transitions. Word has length 107 [2023-04-02 23:46:32,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:46:32,048 INFO L495 AbstractCegarLoop]: Abstraction has 1211 states and 1883 transitions. [2023-04-02 23:46:32,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-04-02 23:46:32,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1883 transitions. [2023-04-02 23:46:32,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-02 23:46:32,050 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:46:32,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:46:32,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 23:46:32,050 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:46:32,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:46:32,050 INFO L85 PathProgramCache]: Analyzing trace with hash 726498724, now seen corresponding path program 1 times [2023-04-02 23:46:32,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:46:32,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687917954] [2023-04-02 23:46:32,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:46:32,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:46:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:46:32,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:46:32,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:46:32,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687917954] [2023-04-02 23:46:32,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687917954] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:46:32,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:46:32,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:46:32,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103564039] [2023-04-02 23:46:32,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:46:32,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:46:32,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:46:32,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:46:32,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:46:32,216 INFO L87 Difference]: Start difference. First operand 1211 states and 1883 transitions. Second operand has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2023-04-02 23:46:32,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:46:32,420 INFO L93 Difference]: Finished difference Result 2353 states and 3792 transitions. [2023-04-02 23:46:32,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 23:46:32,421 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) Word has length 108 [2023-04-02 23:46:32,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:46:32,425 INFO L225 Difference]: With dead ends: 2353 [2023-04-02 23:46:32,425 INFO L226 Difference]: Without dead ends: 1211 [2023-04-02 23:46:32,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:46:32,429 INFO L413 NwaCegarLoop]: 607 mSDtfsCounter, 195 mSDsluCounter, 2789 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 3396 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:46:32,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 3396 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:46:32,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2023-04-02 23:46:32,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 1211. [2023-04-02 23:46:32,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 847 states have (on average 1.5218417945690672) internal successors, (1289), 895 states have internal predecessors, (1289), 261 states have call successors, (261), 97 states have call predecessors, (261), 102 states have return successors, (287), 242 states have call predecessors, (287), 253 states have call successors, (287) [2023-04-02 23:46:32,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1837 transitions. [2023-04-02 23:46:32,474 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1837 transitions. Word has length 108 [2023-04-02 23:46:32,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:46:32,474 INFO L495 AbstractCegarLoop]: Abstraction has 1211 states and 1837 transitions. [2023-04-02 23:46:32,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2023-04-02 23:46:32,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1837 transitions. [2023-04-02 23:46:32,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-04-02 23:46:32,476 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:46:32,476 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:46:32,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 23:46:32,476 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:46:32,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:46:32,477 INFO L85 PathProgramCache]: Analyzing trace with hash -190904107, now seen corresponding path program 1 times [2023-04-02 23:46:32,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:46:32,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784925956] [2023-04-02 23:46:32,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:46:32,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:46:32,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:46:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:46:32,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:46:32,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784925956] [2023-04-02 23:46:32,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784925956] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:46:32,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:46:32,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:46:32,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047733042] [2023-04-02 23:46:32,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:46:32,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:46:32,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:46:32,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:46:32,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:46:32,770 INFO L87 Difference]: Start difference. First operand 1211 states and 1837 transitions. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 6 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (21), 6 states have call predecessors, (21), 5 states have call successors, (21) [2023-04-02 23:46:34,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:46:34,350 INFO L93 Difference]: Finished difference Result 2047 states and 3111 transitions. [2023-04-02 23:46:34,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 23:46:34,351 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 6 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (21), 6 states have call predecessors, (21), 5 states have call successors, (21) Word has length 109 [2023-04-02 23:46:34,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:46:34,356 INFO L225 Difference]: With dead ends: 2047 [2023-04-02 23:46:34,356 INFO L226 Difference]: Without dead ends: 1189 [2023-04-02 23:46:34,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:46:34,360 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 1228 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 2417 mSolverCounterSat, 465 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1313 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 2882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 2417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-02 23:46:34,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1313 Valid, 363 Invalid, 2882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [465 Valid, 2417 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-02 23:46:34,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2023-04-02 23:46:34,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1151. [2023-04-02 23:46:34,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 795 states have (on average 1.4188679245283018) internal successors, (1128), 841 states have internal predecessors, (1128), 252 states have call successors, (252), 99 states have call predecessors, (252), 103 states have return successors, (273), 234 states have call predecessors, (273), 244 states have call successors, (273) [2023-04-02 23:46:34,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1653 transitions. [2023-04-02 23:46:34,456 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1653 transitions. Word has length 109 [2023-04-02 23:46:34,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:46:34,456 INFO L495 AbstractCegarLoop]: Abstraction has 1151 states and 1653 transitions. [2023-04-02 23:46:34,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 6 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (21), 6 states have call predecessors, (21), 5 states have call successors, (21) [2023-04-02 23:46:34,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1653 transitions. [2023-04-02 23:46:34,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-02 23:46:34,458 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:46:34,458 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:46:34,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 23:46:34,458 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:46:34,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:46:34,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1679005514, now seen corresponding path program 1 times [2023-04-02 23:46:34,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:46:34,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188230023] [2023-04-02 23:46:34,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:46:34,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:46:34,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:46:34,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:46:34,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:46:34,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188230023] [2023-04-02 23:46:34,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188230023] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:46:34,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:46:34,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:46:34,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983688969] [2023-04-02 23:46:34,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:46:34,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:46:34,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:46:34,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:46:34,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:46:34,769 INFO L87 Difference]: Start difference. First operand 1151 states and 1653 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 5 states have call successors, (26), 4 states have call predecessors, (26), 4 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) [2023-04-02 23:46:36,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:46:36,353 INFO L93 Difference]: Finished difference Result 2015 states and 2904 transitions. [2023-04-02 23:46:36,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 23:46:36,354 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 5 states have call successors, (26), 4 states have call predecessors, (26), 4 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) Word has length 110 [2023-04-02 23:46:36,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:46:36,361 INFO L225 Difference]: With dead ends: 2015 [2023-04-02 23:46:36,361 INFO L226 Difference]: Without dead ends: 1217 [2023-04-02 23:46:36,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-04-02 23:46:36,365 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 991 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 3055 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1069 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 3435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 3055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-02 23:46:36,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1069 Valid, 505 Invalid, 3435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 3055 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-02 23:46:36,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2023-04-02 23:46:36,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 1179. [2023-04-02 23:46:36,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 815 states have (on average 1.4159509202453988) internal successors, (1154), 862 states have internal predecessors, (1154), 254 states have call successors, (254), 106 states have call predecessors, (254), 109 states have return successors, (291), 234 states have call predecessors, (291), 246 states have call successors, (291) [2023-04-02 23:46:36,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 1699 transitions. [2023-04-02 23:46:36,443 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 1699 transitions. Word has length 110 [2023-04-02 23:46:36,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:46:36,443 INFO L495 AbstractCegarLoop]: Abstraction has 1179 states and 1699 transitions. [2023-04-02 23:46:36,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 5 states have call successors, (26), 4 states have call predecessors, (26), 4 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) [2023-04-02 23:46:36,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 1699 transitions. [2023-04-02 23:46:36,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-04-02 23:46:36,445 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:46:36,445 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 23:46:36,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 23:46:36,445 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:46:36,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:46:36,446 INFO L85 PathProgramCache]: Analyzing trace with hash 635202020, now seen corresponding path program 1 times [2023-04-02 23:46:36,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:46:36,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856999844] [2023-04-02 23:46:36,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:46:36,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:46:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:46:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 23:46:36,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:46:36,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856999844] [2023-04-02 23:46:36,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856999844] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:46:36,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:46:36,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 23:46:36,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651405932] [2023-04-02 23:46:36,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:46:36,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 23:46:36,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:46:36,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 23:46:36,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:46:36,652 INFO L87 Difference]: Start difference. First operand 1179 states and 1699 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) [2023-04-02 23:46:36,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:46:36,942 INFO L93 Difference]: Finished difference Result 1218 states and 1755 transitions. [2023-04-02 23:46:36,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:46:36,942 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) Word has length 117 [2023-04-02 23:46:36,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:46:36,947 INFO L225 Difference]: With dead ends: 1218 [2023-04-02 23:46:36,948 INFO L226 Difference]: Without dead ends: 1201 [2023-04-02 23:46:36,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:46:36,949 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 617 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 1483 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:46:36,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 1483 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:46:36,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2023-04-02 23:46:37,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1183. [2023-04-02 23:46:37,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 819 states have (on average 1.413919413919414) internal successors, (1158), 866 states have internal predecessors, (1158), 254 states have call successors, (254), 106 states have call predecessors, (254), 109 states have return successors, (291), 234 states have call predecessors, (291), 246 states have call successors, (291) [2023-04-02 23:46:37,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 1703 transitions. [2023-04-02 23:46:37,013 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 1703 transitions. Word has length 117 [2023-04-02 23:46:37,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:46:37,014 INFO L495 AbstractCegarLoop]: Abstraction has 1183 states and 1703 transitions. [2023-04-02 23:46:37,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) [2023-04-02 23:46:37,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 1703 transitions. [2023-04-02 23:46:37,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-04-02 23:46:37,015 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:46:37,016 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 23:46:37,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 23:46:37,016 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:46:37,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:46:37,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1276830970, now seen corresponding path program 1 times [2023-04-02 23:46:37,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:46:37,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243934732] [2023-04-02 23:46:37,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:46:37,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:46:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:46:37,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 23:46:37,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:46:37,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243934732] [2023-04-02 23:46:37,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243934732] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:46:37,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:46:37,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 23:46:37,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784813604] [2023-04-02 23:46:37,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:46:37,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 23:46:37,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:46:37,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 23:46:37,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:46:37,284 INFO L87 Difference]: Start difference. First operand 1183 states and 1703 transitions. Second operand has 8 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (25), 4 states have call predecessors, (25), 1 states have call successors, (25) [2023-04-02 23:46:37,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:46:37,429 INFO L93 Difference]: Finished difference Result 1204 states and 1729 transitions. [2023-04-02 23:46:37,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 23:46:37,429 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (25), 4 states have call predecessors, (25), 1 states have call successors, (25) Word has length 122 [2023-04-02 23:46:37,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:46:37,435 INFO L225 Difference]: With dead ends: 1204 [2023-04-02 23:46:37,435 INFO L226 Difference]: Without dead ends: 1187 [2023-04-02 23:46:37,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:46:37,436 INFO L413 NwaCegarLoop]: 565 mSDtfsCounter, 10 mSDsluCounter, 3371 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 3936 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:46:37,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 3936 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:46:37,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2023-04-02 23:46:37,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 1183. [2023-04-02 23:46:37,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 819 states have (on average 1.4114774114774116) internal successors, (1156), 866 states have internal predecessors, (1156), 254 states have call successors, (254), 106 states have call predecessors, (254), 109 states have return successors, (291), 234 states have call predecessors, (291), 246 states have call successors, (291) [2023-04-02 23:46:37,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 1701 transitions. [2023-04-02 23:46:37,494 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 1701 transitions. Word has length 122 [2023-04-02 23:46:37,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:46:37,494 INFO L495 AbstractCegarLoop]: Abstraction has 1183 states and 1701 transitions. [2023-04-02 23:46:37,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (25), 4 states have call predecessors, (25), 1 states have call successors, (25) [2023-04-02 23:46:37,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 1701 transitions. [2023-04-02 23:46:37,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-04-02 23:46:37,497 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:46:37,497 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:46:37,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 23:46:37,497 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:46:37,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:46:37,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1907817873, now seen corresponding path program 1 times [2023-04-02 23:46:37,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:46:37,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461800034] [2023-04-02 23:46:37,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:46:37,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:46:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:46:37,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 23:46:37,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:46:37,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461800034] [2023-04-02 23:46:37,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461800034] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:46:37,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:46:37,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:46:37,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970094570] [2023-04-02 23:46:37,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:46:37,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:46:37,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:46:37,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:46:37,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:46:37,727 INFO L87 Difference]: Start difference. First operand 1183 states and 1701 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 4 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-02 23:46:38,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:46:38,710 INFO L93 Difference]: Finished difference Result 3541 states and 5184 transitions. [2023-04-02 23:46:38,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:46:38,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 4 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 134 [2023-04-02 23:46:38,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:46:38,719 INFO L225 Difference]: With dead ends: 3541 [2023-04-02 23:46:38,719 INFO L226 Difference]: Without dead ends: 2400 [2023-04-02 23:46:38,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:46:38,722 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 1123 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1190 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 23:46:38,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1190 Valid, 507 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 23:46:38,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2023-04-02 23:46:38,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2302. [2023-04-02 23:46:38,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2302 states, 1616 states have (on average 1.4183168316831682) internal successors, (2292), 1708 states have internal predecessors, (2292), 476 states have call successors, (476), 191 states have call predecessors, (476), 209 states have return successors, (583), 436 states have call predecessors, (583), 467 states have call successors, (583) [2023-04-02 23:46:38,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 3351 transitions. [2023-04-02 23:46:38,838 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 3351 transitions. Word has length 134 [2023-04-02 23:46:38,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:46:38,838 INFO L495 AbstractCegarLoop]: Abstraction has 2302 states and 3351 transitions. [2023-04-02 23:46:38,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 4 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-02 23:46:38,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 3351 transitions. [2023-04-02 23:46:38,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-04-02 23:46:38,840 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:46:38,840 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 23:46:38,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-02 23:46:38,841 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:46:38,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:46:38,841 INFO L85 PathProgramCache]: Analyzing trace with hash 501472998, now seen corresponding path program 1 times [2023-04-02 23:46:38,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:46:38,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759814652] [2023-04-02 23:46:38,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:46:38,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:46:38,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:46:39,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 23:46:39,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:46:39,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759814652] [2023-04-02 23:46:39,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759814652] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:46:39,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:46:39,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:46:39,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300378556] [2023-04-02 23:46:39,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:46:39,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:46:39,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:46:39,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:46:39,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:46:39,062 INFO L87 Difference]: Start difference. First operand 2302 states and 3351 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:46:40,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:46:40,258 INFO L93 Difference]: Finished difference Result 6843 states and 10112 transitions. [2023-04-02 23:46:40,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:46:40,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 138 [2023-04-02 23:46:40,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:46:40,280 INFO L225 Difference]: With dead ends: 6843 [2023-04-02 23:46:40,280 INFO L226 Difference]: Without dead ends: 4586 [2023-04-02 23:46:40,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:46:40,290 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 1114 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1179 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-02 23:46:40,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1179 Valid, 512 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-02 23:46:40,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4586 states. [2023-04-02 23:46:40,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4586 to 4465. [2023-04-02 23:46:40,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4465 states, 3168 states have (on average 1.4201388888888888) internal successors, (4499), 3352 states have internal predecessors, (4499), 886 states have call successors, (886), 361 states have call predecessors, (886), 410 states have return successors, (1167), 809 states have call predecessors, (1167), 875 states have call successors, (1167) [2023-04-02 23:46:40,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4465 states to 4465 states and 6552 transitions. [2023-04-02 23:46:40,617 INFO L78 Accepts]: Start accepts. Automaton has 4465 states and 6552 transitions. Word has length 138 [2023-04-02 23:46:40,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:46:40,618 INFO L495 AbstractCegarLoop]: Abstraction has 4465 states and 6552 transitions. [2023-04-02 23:46:40,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:46:40,618 INFO L276 IsEmpty]: Start isEmpty. Operand 4465 states and 6552 transitions. [2023-04-02 23:46:40,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-02 23:46:40,620 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:46:40,620 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:46:40,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-02 23:46:40,620 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:46:40,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:46:40,621 INFO L85 PathProgramCache]: Analyzing trace with hash -579081805, now seen corresponding path program 1 times [2023-04-02 23:46:40,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:46:40,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130073313] [2023-04-02 23:46:40,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:46:40,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:46:40,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:46:40,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 23:46:40,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:46:40,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130073313] [2023-04-02 23:46:40,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130073313] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:46:40,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:46:40,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:46:40,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988473515] [2023-04-02 23:46:40,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:46:40,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:46:40,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:46:40,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:46:40,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:46:40,871 INFO L87 Difference]: Start difference. First operand 4465 states and 6552 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-02 23:46:42,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:46:42,320 INFO L93 Difference]: Finished difference Result 13380 states and 20044 transitions. [2023-04-02 23:46:42,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:46:42,320 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 136 [2023-04-02 23:46:42,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:46:42,363 INFO L225 Difference]: With dead ends: 13380 [2023-04-02 23:46:42,363 INFO L226 Difference]: Without dead ends: 8966 [2023-04-02 23:46:42,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:46:42,381 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 1117 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1184 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-02 23:46:42,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1184 Valid, 517 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-02 23:46:42,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8966 states. [2023-04-02 23:46:42,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8966 to 8800. [2023-04-02 23:46:42,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8800 states, 6275 states have (on average 1.4197609561752988) internal successors, (8909), 6647 states have internal predecessors, (8909), 1702 states have call successors, (1702), 701 states have call predecessors, (1702), 822 states have return successors, (2459), 1557 states have call predecessors, (2459), 1687 states have call successors, (2459) [2023-04-02 23:46:42,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8800 states to 8800 states and 13070 transitions. [2023-04-02 23:46:42,963 INFO L78 Accepts]: Start accepts. Automaton has 8800 states and 13070 transitions. Word has length 136 [2023-04-02 23:46:42,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:46:42,963 INFO L495 AbstractCegarLoop]: Abstraction has 8800 states and 13070 transitions. [2023-04-02 23:46:42,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-02 23:46:42,964 INFO L276 IsEmpty]: Start isEmpty. Operand 8800 states and 13070 transitions. [2023-04-02 23:46:42,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-04-02 23:46:42,966 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:46:42,966 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:46:42,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-02 23:46:42,966 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:46:42,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:46:42,967 INFO L85 PathProgramCache]: Analyzing trace with hash -772941030, now seen corresponding path program 1 times [2023-04-02 23:46:42,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:46:42,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379152544] [2023-04-02 23:46:42,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:46:42,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:46:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:46:43,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 23:46:43,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:46:43,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379152544] [2023-04-02 23:46:43,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379152544] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:46:43,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:46:43,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:46:43,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144806429] [2023-04-02 23:46:43,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:46:43,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:46:43,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:46:43,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:46:43,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:46:43,256 INFO L87 Difference]: Start difference. First operand 8800 states and 13070 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 4 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-02 23:46:45,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:46:45,180 INFO L93 Difference]: Finished difference Result 26479 states and 40639 transitions. [2023-04-02 23:46:45,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:46:45,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 4 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 137 [2023-04-02 23:46:45,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:46:45,237 INFO L225 Difference]: With dead ends: 26479 [2023-04-02 23:46:45,237 INFO L226 Difference]: Without dead ends: 17742 [2023-04-02 23:46:45,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:46:45,265 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 1114 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1181 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-02 23:46:45,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1181 Valid, 522 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-02 23:46:45,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17742 states. [2023-04-02 23:46:46,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17742 to 17487. [2023-04-02 23:46:46,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17487 states, 12494 states have (on average 1.4182007363534497) internal successors, (17719), 13250 states have internal predecessors, (17719), 3326 states have call successors, (3326), 1381 states have call predecessors, (3326), 1666 states have return successors, (5471), 3057 states have call predecessors, (5471), 3303 states have call successors, (5471) [2023-04-02 23:46:46,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17487 states to 17487 states and 26516 transitions. [2023-04-02 23:46:46,474 INFO L78 Accepts]: Start accepts. Automaton has 17487 states and 26516 transitions. Word has length 137 [2023-04-02 23:46:46,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:46:46,475 INFO L495 AbstractCegarLoop]: Abstraction has 17487 states and 26516 transitions. [2023-04-02 23:46:46,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 4 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-04-02 23:46:46,475 INFO L276 IsEmpty]: Start isEmpty. Operand 17487 states and 26516 transitions. [2023-04-02 23:46:46,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-04-02 23:46:46,477 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:46:46,477 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 23:46:46,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-02 23:46:46,477 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:46:46,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:46:46,478 INFO L85 PathProgramCache]: Analyzing trace with hash 216738983, now seen corresponding path program 1 times [2023-04-02 23:46:46,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:46:46,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184531198] [2023-04-02 23:46:46,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:46:46,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:46:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:46:46,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 23:46:46,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:46:46,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184531198] [2023-04-02 23:46:46,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184531198] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:46:46,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:46:46,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:46:46,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85548715] [2023-04-02 23:46:46,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:46:46,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:46:46,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:46:46,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:46:46,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:46:46,666 INFO L87 Difference]: Start difference. First operand 17487 states and 26516 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:46:49,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:46:49,977 INFO L93 Difference]: Finished difference Result 52754 states and 84471 transitions. [2023-04-02 23:46:49,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:46:49,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 141 [2023-04-02 23:46:49,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:46:50,281 INFO L225 Difference]: With dead ends: 52754 [2023-04-02 23:46:50,282 INFO L226 Difference]: Without dead ends: 35342 [2023-04-02 23:46:50,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:46:50,320 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 1106 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1171 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-02 23:46:50,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1171 Valid, 528 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-02 23:46:50,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35342 states. [2023-04-02 23:46:52,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35342 to 34756. [2023-04-02 23:46:52,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34756 states, 24884 states have (on average 1.4179392380646199) internal successors, (35284), 26394 states have internal predecessors, (35284), 6557 states have call successors, (6557), 2738 states have call predecessors, (6557), 3314 states have return successors, (12468), 6017 states have call predecessors, (12468), 6519 states have call successors, (12468) [2023-04-02 23:46:53,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34756 states to 34756 states and 54309 transitions. [2023-04-02 23:46:53,110 INFO L78 Accepts]: Start accepts. Automaton has 34756 states and 54309 transitions. Word has length 141 [2023-04-02 23:46:53,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:46:53,110 INFO L495 AbstractCegarLoop]: Abstraction has 34756 states and 54309 transitions. [2023-04-02 23:46:53,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 4 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-02 23:46:53,110 INFO L276 IsEmpty]: Start isEmpty. Operand 34756 states and 54309 transitions. [2023-04-02 23:46:53,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-04-02 23:46:53,118 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:46:53,118 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:46:53,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-02 23:46:53,118 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:46:53,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:46:53,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1085703557, now seen corresponding path program 1 times [2023-04-02 23:46:53,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:46:53,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325611918] [2023-04-02 23:46:53,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:46:53,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:46:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:46:53,528 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-04-02 23:46:53,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:46:53,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325611918] [2023-04-02 23:46:53,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325611918] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:46:53,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270445668] [2023-04-02 23:46:53,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:46:53,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:46:53,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:46:53,531 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) [2023-04-02 23:46:53,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 23:46:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:46:54,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 3032 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:46:54,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:46:54,135 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-02 23:46:54,135 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:46:54,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270445668] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:46:54,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:46:54,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-04-02 23:46:54,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095816750] [2023-04-02 23:46:54,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:46:54,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:46:54,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:46:54,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:46:54,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:46:54,137 INFO L87 Difference]: Start difference. First operand 34756 states and 54309 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, (40), 2 states have call predecessors, (40), 3 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2023-04-02 23:46:56,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:46:56,603 INFO L93 Difference]: Finished difference Result 71965 states and 116306 transitions. [2023-04-02 23:46:56,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:46:56,604 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, (40), 2 states have call predecessors, (40), 3 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 185 [2023-04-02 23:46:56,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:46:56,770 INFO L225 Difference]: With dead ends: 71965 [2023-04-02 23:46:56,770 INFO L226 Difference]: Without dead ends: 37252 [2023-04-02 23:46:56,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-02 23:46:56,846 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 213 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1473 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:46:56,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1473 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:46:56,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37252 states. [2023-04-02 23:46:59,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37252 to 37252. [2023-04-02 23:46:59,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37252 states, 27316 states have (on average 1.4627324644896764) internal successors, (39956), 28826 states have internal predecessors, (39956), 6557 states have call successors, (6557), 2802 states have call predecessors, (6557), 3378 states have return successors, (12468), 6017 states have call predecessors, (12468), 6519 states have call successors, (12468) [2023-04-02 23:46:59,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37252 states to 37252 states and 58981 transitions. [2023-04-02 23:46:59,847 INFO L78 Accepts]: Start accepts. Automaton has 37252 states and 58981 transitions. Word has length 185 [2023-04-02 23:46:59,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:46:59,847 INFO L495 AbstractCegarLoop]: Abstraction has 37252 states and 58981 transitions. [2023-04-02 23:46:59,847 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, (40), 2 states have call predecessors, (40), 3 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2023-04-02 23:46:59,848 INFO L276 IsEmpty]: Start isEmpty. Operand 37252 states and 58981 transitions. [2023-04-02 23:46:59,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2023-04-02 23:46:59,855 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:46:59,855 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:46:59,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 23:47:00,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-02 23:47:00,063 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:47:00,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:47:00,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1276674978, now seen corresponding path program 1 times [2023-04-02 23:47:00,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:47:00,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492832407] [2023-04-02 23:47:00,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:00,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:47:00,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-04-02 23:47:00,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:47:00,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492832407] [2023-04-02 23:47:00,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492832407] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:47:00,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125289215] [2023-04-02 23:47:00,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:00,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:47:00,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:47:00,223 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) [2023-04-02 23:47:00,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 23:47:00,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:00,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 3037 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:47:00,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:47:00,953 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-02 23:47:00,953 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:47:00,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125289215] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:47:00,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:47:00,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:47:00,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636724162] [2023-04-02 23:47:00,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:47:00,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:47:00,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:47:00,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:47:00,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:47:00,955 INFO L87 Difference]: Start difference. First operand 37252 states and 58981 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, (40), 2 states have call predecessors, (40), 3 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2023-04-02 23:47:03,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:47:03,774 INFO L93 Difference]: Finished difference Result 76957 states and 125584 transitions. [2023-04-02 23:47:03,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:47:03,774 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, (40), 2 states have call predecessors, (40), 3 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 190 [2023-04-02 23:47:03,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:47:03,940 INFO L225 Difference]: With dead ends: 76957 [2023-04-02 23:47:03,940 INFO L226 Difference]: Without dead ends: 39748 [2023-04-02 23:47:04,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:47:04,219 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 211 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1473 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:47:04,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1473 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:47:04,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39748 states. [2023-04-02 23:47:06,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39748 to 39748. [2023-04-02 23:47:06,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39748 states, 29748 states have (on average 1.500201694231545) internal successors, (44628), 31258 states have internal predecessors, (44628), 6557 states have call successors, (6557), 2866 states have call predecessors, (6557), 3442 states have return successors, (12468), 6017 states have call predecessors, (12468), 6519 states have call successors, (12468) [2023-04-02 23:47:06,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39748 states to 39748 states and 63653 transitions. [2023-04-02 23:47:06,867 INFO L78 Accepts]: Start accepts. Automaton has 39748 states and 63653 transitions. Word has length 190 [2023-04-02 23:47:06,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:47:06,867 INFO L495 AbstractCegarLoop]: Abstraction has 39748 states and 63653 transitions. [2023-04-02 23:47:06,867 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, (40), 2 states have call predecessors, (40), 3 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2023-04-02 23:47:06,868 INFO L276 IsEmpty]: Start isEmpty. Operand 39748 states and 63653 transitions. [2023-04-02 23:47:06,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-04-02 23:47:06,876 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:47:06,876 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:47:06,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 23:47:07,085 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,SelfDestructingSolverStorable17 [2023-04-02 23:47:07,086 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:47:07,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:47:07,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1332315476, now seen corresponding path program 1 times [2023-04-02 23:47:07,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:47:07,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804794600] [2023-04-02 23:47:07,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:07,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:47:07,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:07,300 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-04-02 23:47:07,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:47:07,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804794600] [2023-04-02 23:47:07,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804794600] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:47:07,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703742769] [2023-04-02 23:47:07,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:07,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:47:07,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:47:07,302 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) [2023-04-02 23:47:07,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 23:47:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:07,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 3041 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:47:07,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:47:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-02 23:47:07,794 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:47:07,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703742769] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:47:07,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:47:07,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:47:07,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5572829] [2023-04-02 23:47:07,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:47:07,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:47:07,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:47:07,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:47:07,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:47:07,796 INFO L87 Difference]: Start difference. First operand 39748 states and 63653 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2023-04-02 23:47:10,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:47:10,297 INFO L93 Difference]: Finished difference Result 81949 states and 134862 transitions. [2023-04-02 23:47:10,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:47:10,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 194 [2023-04-02 23:47:10,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:47:10,567 INFO L225 Difference]: With dead ends: 81949 [2023-04-02 23:47:10,567 INFO L226 Difference]: Without dead ends: 42244 [2023-04-02 23:47:10,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:47:10,846 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 209 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1473 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:47:10,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1473 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:47:10,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42244 states. [2023-04-02 23:47:13,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42244 to 42244. [2023-04-02 23:47:13,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42244 states, 32180 states have (on average 1.5320074580484773) internal successors, (49300), 33690 states have internal predecessors, (49300), 6557 states have call successors, (6557), 2930 states have call predecessors, (6557), 3506 states have return successors, (12468), 6017 states have call predecessors, (12468), 6519 states have call successors, (12468) [2023-04-02 23:47:13,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42244 states to 42244 states and 68325 transitions. [2023-04-02 23:47:13,584 INFO L78 Accepts]: Start accepts. Automaton has 42244 states and 68325 transitions. Word has length 194 [2023-04-02 23:47:13,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:47:13,585 INFO L495 AbstractCegarLoop]: Abstraction has 42244 states and 68325 transitions. [2023-04-02 23:47:13,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2023-04-02 23:47:13,585 INFO L276 IsEmpty]: Start isEmpty. Operand 42244 states and 68325 transitions. [2023-04-02 23:47:13,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2023-04-02 23:47:13,594 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:47:13,594 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:47:13,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 23:47:13,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:47:13,803 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:47:13,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:47:13,803 INFO L85 PathProgramCache]: Analyzing trace with hash 557905565, now seen corresponding path program 1 times [2023-04-02 23:47:13,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:47:13,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233990709] [2023-04-02 23:47:13,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:13,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:47:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:13,945 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-04-02 23:47:13,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:47:13,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233990709] [2023-04-02 23:47:13,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233990709] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:47:13,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581404453] [2023-04-02 23:47:13,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:13,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:47:13,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:47:13,962 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) [2023-04-02 23:47:13,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 23:47:14,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:14,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 3044 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:47:14,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:47:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-04-02 23:47:14,584 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:47:14,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581404453] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:47:14,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:47:14,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:47:14,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052735031] [2023-04-02 23:47:14,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:47:14,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:47:14,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:47:14,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:47:14,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:47:14,586 INFO L87 Difference]: Start difference. First operand 42244 states and 68325 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2023-04-02 23:47:17,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:47:17,251 INFO L93 Difference]: Finished difference Result 86941 states and 144140 transitions. [2023-04-02 23:47:17,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:47:17,252 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 197 [2023-04-02 23:47:17,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:47:17,433 INFO L225 Difference]: With dead ends: 86941 [2023-04-02 23:47:17,433 INFO L226 Difference]: Without dead ends: 44740 [2023-04-02 23:47:17,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:47:17,514 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 207 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1473 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:47:17,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1473 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:47:17,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44740 states. [2023-04-02 23:47:20,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44740 to 44740. [2023-04-02 23:47:20,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44740 states, 34612 states have (on average 1.559343580261181) internal successors, (53972), 36122 states have internal predecessors, (53972), 6557 states have call successors, (6557), 2994 states have call predecessors, (6557), 3570 states have return successors, (12468), 6017 states have call predecessors, (12468), 6519 states have call successors, (12468) [2023-04-02 23:47:20,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44740 states to 44740 states and 72997 transitions. [2023-04-02 23:47:20,180 INFO L78 Accepts]: Start accepts. Automaton has 44740 states and 72997 transitions. Word has length 197 [2023-04-02 23:47:20,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:47:20,181 INFO L495 AbstractCegarLoop]: Abstraction has 44740 states and 72997 transitions. [2023-04-02 23:47:20,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2023-04-02 23:47:20,181 INFO L276 IsEmpty]: Start isEmpty. Operand 44740 states and 72997 transitions. [2023-04-02 23:47:20,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-04-02 23:47:20,217 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:47:20,217 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:47:20,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-02 23:47:20,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:47:20,418 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:47:20,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:47:20,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1439049841, now seen corresponding path program 1 times [2023-04-02 23:47:20,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:47:20,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351019803] [2023-04-02 23:47:20,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:20,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:47:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:20,789 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-02 23:47:20,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:47:20,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351019803] [2023-04-02 23:47:20,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351019803] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:47:20,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77168558] [2023-04-02 23:47:20,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:20,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:47:20,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:47:20,791 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) [2023-04-02 23:47:20,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 23:47:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:21,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 3040 conjuncts, 63 conjunts are in the unsatisfiable core [2023-04-02 23:47:21,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:47:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-04-02 23:47:21,847 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:47:21,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77168558] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:47:21,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:47:21,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2023-04-02 23:47:21,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195509921] [2023-04-02 23:47:21,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:47:21,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 23:47:21,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:47:21,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 23:47:21,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2023-04-02 23:47:21,848 INFO L87 Difference]: Start difference. First operand 44740 states and 72997 transitions. Second operand has 12 states, 8 states have (on average 12.375) internal successors, (99), 10 states have internal predecessors, (99), 6 states have call successors, (40), 4 states have call predecessors, (40), 7 states have return successors, (36), 6 states have call predecessors, (36), 5 states have call successors, (36) [2023-04-02 23:47:27,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:47:27,968 INFO L93 Difference]: Finished difference Result 113000 states and 196673 transitions. [2023-04-02 23:47:27,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-02 23:47:27,969 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 12.375) internal successors, (99), 10 states have internal predecessors, (99), 6 states have call successors, (40), 4 states have call predecessors, (40), 7 states have return successors, (36), 6 states have call predecessors, (36), 5 states have call successors, (36) Word has length 199 [2023-04-02 23:47:27,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:47:28,213 INFO L225 Difference]: With dead ends: 113000 [2023-04-02 23:47:28,213 INFO L226 Difference]: Without dead ends: 68338 [2023-04-02 23:47:28,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2023-04-02 23:47:28,294 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 1111 mSDsluCounter, 1604 mSDsCounter, 0 mSdLazyCounter, 4853 mSolverCounterSat, 449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1182 SdHoareTripleChecker+Valid, 1853 SdHoareTripleChecker+Invalid, 5302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 4853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-02 23:47:28,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1182 Valid, 1853 Invalid, 5302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [449 Valid, 4853 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-02 23:47:28,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68338 states. [2023-04-02 23:47:32,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68338 to 67050. [2023-04-02 23:47:32,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67050 states, 51858 states have (on average 1.5592194068417602) internal successors, (80858), 54106 states have internal predecessors, (80858), 9813 states have call successors, (9813), 4474 states have call predecessors, (9813), 5378 states have return successors, (20814), 9055 states have call predecessors, (20814), 9775 states have call successors, (20814) [2023-04-02 23:47:32,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67050 states to 67050 states and 111485 transitions. [2023-04-02 23:47:32,639 INFO L78 Accepts]: Start accepts. Automaton has 67050 states and 111485 transitions. Word has length 199 [2023-04-02 23:47:32,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:47:32,639 INFO L495 AbstractCegarLoop]: Abstraction has 67050 states and 111485 transitions. [2023-04-02 23:47:32,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 12.375) internal successors, (99), 10 states have internal predecessors, (99), 6 states have call successors, (40), 4 states have call predecessors, (40), 7 states have return successors, (36), 6 states have call predecessors, (36), 5 states have call successors, (36) [2023-04-02 23:47:32,639 INFO L276 IsEmpty]: Start isEmpty. Operand 67050 states and 111485 transitions. [2023-04-02 23:47:32,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-04-02 23:47:32,649 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:47:32,649 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:47:32,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-02 23:47:32,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:47:32,860 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:47:32,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:47:32,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1130781606, now seen corresponding path program 1 times [2023-04-02 23:47:32,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:47:32,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775972705] [2023-04-02 23:47:32,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:32,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:47:32,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-02 23:47:33,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:47:33,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775972705] [2023-04-02 23:47:33,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775972705] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:47:33,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875110243] [2023-04-02 23:47:33,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:33,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:47:33,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:47:33,039 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) [2023-04-02 23:47:33,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 23:47:33,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:33,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 3040 conjuncts, 51 conjunts are in the unsatisfiable core [2023-04-02 23:47:33,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:47:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-04-02 23:47:33,785 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:47:33,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875110243] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:47:33,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:47:33,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2023-04-02 23:47:33,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009070912] [2023-04-02 23:47:33,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:47:33,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 23:47:33,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:47:33,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 23:47:33,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2023-04-02 23:47:33,786 INFO L87 Difference]: Start difference. First operand 67050 states and 111485 transitions. Second operand has 10 states, 6 states have (on average 16.5) internal successors, (99), 9 states have internal predecessors, (99), 6 states have call successors, (40), 4 states have call predecessors, (40), 6 states have return successors, (36), 5 states have call predecessors, (36), 5 states have call successors, (36) [2023-04-02 23:47:40,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:47:40,596 INFO L93 Difference]: Finished difference Result 157344 states and 276003 transitions. [2023-04-02 23:47:40,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-02 23:47:40,601 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 6 states have (on average 16.5) internal successors, (99), 9 states have internal predecessors, (99), 6 states have call successors, (40), 4 states have call predecessors, (40), 6 states have return successors, (36), 5 states have call predecessors, (36), 5 states have call successors, (36) Word has length 199 [2023-04-02 23:47:40,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:47:41,144 INFO L225 Difference]: With dead ends: 157344 [2023-04-02 23:47:41,144 INFO L226 Difference]: Without dead ends: 90418 [2023-04-02 23:47:41,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2023-04-02 23:47:41,267 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 1095 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 3959 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1162 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 4387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 3959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:47:41,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1162 Valid, 1344 Invalid, 4387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 3959 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-02 23:47:41,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90418 states. [2023-04-02 23:47:46,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90418 to 89300. [2023-04-02 23:47:46,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89300 states, 69070 states have (on average 1.559374547560446) internal successors, (107706), 72058 states have internal predecessors, (107706), 13069 states have call successors, (13069), 5954 states have call predecessors, (13069), 7160 states have return successors, (30282), 12065 states have call predecessors, (30282), 13031 states have call successors, (30282) [2023-04-02 23:47:47,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89300 states to 89300 states and 151057 transitions. [2023-04-02 23:47:47,160 INFO L78 Accepts]: Start accepts. Automaton has 89300 states and 151057 transitions. Word has length 199 [2023-04-02 23:47:47,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:47:47,161 INFO L495 AbstractCegarLoop]: Abstraction has 89300 states and 151057 transitions. [2023-04-02 23:47:47,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 6 states have (on average 16.5) internal successors, (99), 9 states have internal predecessors, (99), 6 states have call successors, (40), 4 states have call predecessors, (40), 6 states have return successors, (36), 5 states have call predecessors, (36), 5 states have call successors, (36) [2023-04-02 23:47:47,161 INFO L276 IsEmpty]: Start isEmpty. Operand 89300 states and 151057 transitions. [2023-04-02 23:47:47,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-04-02 23:47:47,172 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:47:47,172 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:47:47,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-02 23:47:47,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:47:47,380 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:47:47,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:47:47,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1370576749, now seen corresponding path program 1 times [2023-04-02 23:47:47,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:47:47,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777163147] [2023-04-02 23:47:47,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:47,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:47:47,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-02 23:47:47,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:47:47,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777163147] [2023-04-02 23:47:47,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777163147] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:47:47,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950031795] [2023-04-02 23:47:47,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:47:47,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:47:47,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:47:47,772 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) [2023-04-02 23:47:47,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 23:47:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:47:48,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 3040 conjuncts, 63 conjunts are in the unsatisfiable core [2023-04-02 23:47:48,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:47:48,653 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-04-02 23:47:48,654 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:47:48,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950031795] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:47:48,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:47:48,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2023-04-02 23:47:48,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395605921] [2023-04-02 23:47:48,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:47:48,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 23:47:48,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:47:48,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 23:47:48,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2023-04-02 23:47:48,655 INFO L87 Difference]: Start difference. First operand 89300 states and 151057 transitions. Second operand has 12 states, 8 states have (on average 12.375) internal successors, (99), 10 states have internal predecessors, (99), 6 states have call successors, (40), 4 states have call predecessors, (40), 7 states have return successors, (36), 6 states have call predecessors, (36), 5 states have call successors, (36) [2023-04-02 23:47:57,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:47:57,034 INFO L93 Difference]: Finished difference Result 202258 states and 358123 transitions. [2023-04-02 23:47:57,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-02 23:47:57,034 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 12.375) internal successors, (99), 10 states have internal predecessors, (99), 6 states have call successors, (40), 4 states have call predecessors, (40), 7 states have return successors, (36), 6 states have call predecessors, (36), 5 states have call successors, (36) Word has length 199 [2023-04-02 23:47:57,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:47:57,638 INFO L225 Difference]: With dead ends: 202258 [2023-04-02 23:47:57,638 INFO L226 Difference]: Without dead ends: 113128 [2023-04-02 23:47:57,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2023-04-02 23:47:57,822 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 1111 mSDsluCounter, 1373 mSDsCounter, 0 mSdLazyCounter, 4651 mSolverCounterSat, 459 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1176 SdHoareTripleChecker+Valid, 1578 SdHoareTripleChecker+Invalid, 5110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 459 IncrementalHoareTripleChecker+Valid, 4651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-02 23:47:57,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1176 Valid, 1578 Invalid, 5110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [459 Valid, 4651 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-02 23:47:58,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113128 states. [2023-04-02 23:48:04,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113128 to 111538. [2023-04-02 23:48:05,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111538 states, 86272 states have (on average 1.5594862759643917) internal successors, (134540), 90002 states have internal predecessors, (134540), 16325 states have call successors, (16325), 7434 states have call predecessors, (16325), 8940 states have return successors, (40806), 15071 states have call predecessors, (40806), 16287 states have call successors, (40806) [2023-04-02 23:48:05,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111538 states to 111538 states and 191671 transitions. [2023-04-02 23:48:05,604 INFO L78 Accepts]: Start accepts. Automaton has 111538 states and 191671 transitions. Word has length 199 [2023-04-02 23:48:05,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:48:05,604 INFO L495 AbstractCegarLoop]: Abstraction has 111538 states and 191671 transitions. [2023-04-02 23:48:05,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 12.375) internal successors, (99), 10 states have internal predecessors, (99), 6 states have call successors, (40), 4 states have call predecessors, (40), 7 states have return successors, (36), 6 states have call predecessors, (36), 5 states have call successors, (36) [2023-04-02 23:48:05,604 INFO L276 IsEmpty]: Start isEmpty. Operand 111538 states and 191671 transitions. [2023-04-02 23:48:05,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-04-02 23:48:05,617 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:48:05,618 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:48:05,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-02 23:48:05,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:48:05,827 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:48:05,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:48:05,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1422824308, now seen corresponding path program 1 times [2023-04-02 23:48:05,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:48:05,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295671848] [2023-04-02 23:48:05,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:48:05,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:48:05,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:48:06,175 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-02 23:48:06,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:48:06,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295671848] [2023-04-02 23:48:06,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295671848] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:48:06,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284539245] [2023-04-02 23:48:06,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:48:06,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:48:06,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:48:06,185 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) [2023-04-02 23:48:06,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 23:48:06,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:48:06,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 3040 conjuncts, 55 conjunts are in the unsatisfiable core [2023-04-02 23:48:06,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:48:07,211 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-04-02 23:48:07,211 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:48:07,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284539245] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:48:07,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:48:07,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2023-04-02 23:48:07,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001400171] [2023-04-02 23:48:07,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:48:07,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 23:48:07,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:48:07,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 23:48:07,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2023-04-02 23:48:07,212 INFO L87 Difference]: Start difference. First operand 111538 states and 191671 transitions. Second operand has 10 states, 6 states have (on average 16.5) internal successors, (99), 9 states have internal predecessors, (99), 6 states have call successors, (40), 4 states have call predecessors, (40), 6 states have return successors, (36), 5 states have call predecessors, (36), 5 states have call successors, (36)