/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_spec9_product09.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:55:10,109 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:55:10,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:55:10,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:55:10,153 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:55:10,156 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:55:10,159 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:55:10,161 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:55:10,163 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:55:10,168 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:55:10,169 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:55:10,171 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:55:10,171 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:55:10,174 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:55:10,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:55:10,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:55:10,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:55:10,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:55:10,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:55:10,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:55:10,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:55:10,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:55:10,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:55:10,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:55:10,196 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 23:55:10,197 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 23:55:10,197 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 23:55:10,198 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 23:55:10,199 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 23:55:10,200 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 23:55:10,200 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:55:10,200 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:55:10,202 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:55:10,202 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:55:10,203 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:55:10,203 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:55:10,204 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:55:10,204 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:55:10,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:55:10,205 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:55:10,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:55:10,206 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 23:55:10,236 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:55:10,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:55:10,237 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:55:10,237 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:55:10,238 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:55:10,238 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:55:10,238 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:55:10,239 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:55:10,239 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:55:10,239 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:55:10,239 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:55:10,240 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:55:10,240 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:55:10,240 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:55:10,240 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:55:10,240 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:55:10,240 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:55:10,240 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:55:10,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:55:10,241 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:55:10,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:55:10,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:55:10,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:55:10,242 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:55:10,242 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:55:10,242 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:55:10,243 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:55:10,243 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:55:10,243 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:55:10,243 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:55:10,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:55:10,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:55:10,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:55:10,244 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:55:10,244 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:55:10,244 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:55:10,244 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:55:10,244 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:55:10,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:55:10,244 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:55:10,244 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:55:10,245 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:55:10,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:55:10,449 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:55:10,451 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:55:10,452 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:55:10,452 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:55:10,453 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c [2023-04-02 23:55:11,544 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:55:11,813 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:55:11,814 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c [2023-04-02 23:55:11,832 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25391c02c/14ae3ae38cd74608a3e4a62a1371e682/FLAG388da8dba [2023-04-02 23:55:11,849 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25391c02c/14ae3ae38cd74608a3e4a62a1371e682 [2023-04-02 23:55:11,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:55:11,853 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:55:11,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:55:11,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:55:11,860 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:55:11,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:55:11" (1/1) ... [2023-04-02 23:55:11,861 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5eaa7f44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:11, skipping insertion in model container [2023-04-02 23:55:11,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:55:11" (1/1) ... [2023-04-02 23:55:11,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:55:11,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:55:12,335 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_spec9_product09.cil.c[70349,70362] [2023-04-02 23:55:12,339 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:55:12,355 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:55:12,437 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_spec9_product09.cil.c[70349,70362] [2023-04-02 23:55:12,437 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:55:12,459 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:55:12,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:12 WrapperNode [2023-04-02 23:55:12,460 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:55:12,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:55:12,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:55:12,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:55:12,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:12" (1/1) ... [2023-04-02 23:55:12,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:12" (1/1) ... [2023-04-02 23:55:12,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:12" (1/1) ... [2023-04-02 23:55:12,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:12" (1/1) ... [2023-04-02 23:55:12,538 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:12" (1/1) ... [2023-04-02 23:55:12,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:12" (1/1) ... [2023-04-02 23:55:12,561 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:12" (1/1) ... [2023-04-02 23:55:12,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:12" (1/1) ... [2023-04-02 23:55:12,589 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:55:12,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:55:12,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:55:12,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:55:12,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:12" (1/1) ... [2023-04-02 23:55:12,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:55:12,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:55:12,633 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 23:55:12,653 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 23:55:12,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:55:12,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:55:12,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-02 23:55:12,677 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:55:12,679 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-02 23:55:12,679 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-02 23:55:12,679 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-02 23:55:12,679 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-02 23:55:12,679 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-02 23:55:12,679 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-02 23:55:12,680 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-02 23:55:12,680 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-02 23:55:12,680 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-02 23:55:12,680 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-02 23:55:12,680 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-02 23:55:12,680 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-02 23:55:12,680 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-02 23:55:12,680 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-02 23:55:12,680 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-02 23:55:12,680 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-02 23:55:12,681 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-02 23:55:12,681 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-02 23:55:12,681 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-02 23:55:12,681 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-02 23:55:12,681 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-02 23:55:12,681 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-02 23:55:12,681 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-02 23:55:12,681 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-02 23:55:12,681 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-02 23:55:12,681 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:55:12,681 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-02 23:55:12,682 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-02 23:55:12,682 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-02 23:55:12,682 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-02 23:55:12,682 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-02 23:55:12,682 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-02 23:55:12,682 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-02 23:55:12,682 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-02 23:55:12,682 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-02 23:55:12,682 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-02 23:55:12,682 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-02 23:55:12,682 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-02 23:55:12,683 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-02 23:55:12,683 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-02 23:55:12,684 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-02 23:55:12,684 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-02 23:55:12,685 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-02 23:55:12,685 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-02 23:55:12,685 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-02 23:55:12,685 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-02 23:55:12,685 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-02 23:55:12,685 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-02 23:55:12,685 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-02 23:55:12,685 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-02 23:55:12,686 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-02 23:55:12,686 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-02 23:55:12,686 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-02 23:55:12,687 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-02 23:55:12,687 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-02 23:55:12,687 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-02 23:55:12,687 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__1 [2023-04-02 23:55:12,688 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__2 [2023-04-02 23:55:12,688 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__3 [2023-04-02 23:55:12,688 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__4 [2023-04-02 23:55:12,688 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-02 23:55:12,688 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-02 23:55:12,688 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-02 23:55:12,688 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-02 23:55:12,688 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-02 23:55:12,688 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-02 23:55:12,688 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-02 23:55:12,688 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-02 23:55:12,689 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-02 23:55:12,689 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-02 23:55:12,689 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:55:12,689 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:55:12,689 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:55:12,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:55:12,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 23:55:12,690 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-02 23:55:12,690 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-02 23:55:12,690 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-02 23:55:12,690 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-02 23:55:12,691 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-02 23:55:12,691 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-02 23:55:12,691 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-02 23:55:12,691 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-02 23:55:12,691 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-02 23:55:12,691 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-02 23:55:12,692 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-02 23:55:12,692 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 23:55:12,692 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-02 23:55:12,692 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-02 23:55:12,692 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-02 23:55:12,692 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-02 23:55:12,692 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-02 23:55:12,692 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-02 23:55:12,692 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-02 23:55:12,692 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-02 23:55:12,692 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-02 23:55:12,693 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-02 23:55:12,693 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-02 23:55:12,693 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-02 23:55:12,693 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-02 23:55:12,693 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-02 23:55:12,693 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-02 23:55:12,693 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-02 23:55:12,693 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-02 23:55:12,693 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-02 23:55:12,694 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-02 23:55:12,694 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__1 [2023-04-02 23:55:12,694 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__4 [2023-04-02 23:55:12,694 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-02 23:55:12,694 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-02 23:55:12,694 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-02 23:55:12,694 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-02 23:55:12,694 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:55:12,695 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-02 23:55:12,695 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-02 23:55:12,695 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-02 23:55:12,695 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-02 23:55:12,696 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-02 23:55:12,698 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-02 23:55:12,698 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-02 23:55:12,703 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-02 23:55:12,703 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-02 23:55:12,703 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-02 23:55:12,703 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-02 23:55:12,704 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__2 [2023-04-02 23:55:12,704 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-02 23:55:12,704 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-02 23:55:12,704 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-02 23:55:12,704 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-02 23:55:12,705 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-02 23:55:12,705 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-02 23:55:12,705 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-02 23:55:12,705 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-02 23:55:12,705 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-02 23:55:12,705 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__3 [2023-04-02 23:55:12,705 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-02 23:55:12,705 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 23:55:12,705 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 23:55:12,705 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-02 23:55:12,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 23:55:12,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 23:55:12,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:55:12,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 23:55:12,706 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-02 23:55:12,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:55:12,706 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-02 23:55:12,706 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-02 23:55:12,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:55:12,706 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-02 23:55:12,706 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-02 23:55:12,706 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-02 23:55:12,706 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-02 23:55:12,706 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-02 23:55:12,707 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-02 23:55:12,707 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-02 23:55:12,707 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-02 23:55:12,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:55:12,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:55:12,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:55:12,961 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:55:12,964 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:55:14,253 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:55:15,153 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:55:15,153 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-02 23:55:15,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:55:15 BoogieIcfgContainer [2023-04-02 23:55:15,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:55:15,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:55:15,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:55:15,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:55:15,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:55:11" (1/3) ... [2023-04-02 23:55:15,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53625c90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:55:15, skipping insertion in model container [2023-04-02 23:55:15,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:55:12" (2/3) ... [2023-04-02 23:55:15,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53625c90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:55:15, skipping insertion in model container [2023-04-02 23:55:15,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:55:15" (3/3) ... [2023-04-02 23:55:15,167 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product09.cil.c [2023-04-02 23:55:15,183 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:55:15,184 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:55:15,255 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:55:15,261 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;@aa16e7a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:55:15,262 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:55:15,270 INFO L276 IsEmpty]: Start isEmpty. Operand has 528 states, 309 states have (on average 1.5048543689320388) internal successors, (465), 336 states have internal predecessors, (465), 160 states have call successors, (160), 46 states have call predecessors, (160), 46 states have return successors, (160), 151 states have call predecessors, (160), 160 states have call successors, (160) [2023-04-02 23:55:15,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-02 23:55:15,299 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:15,300 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 23:55:15,301 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:15,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:15,307 INFO L85 PathProgramCache]: Analyzing trace with hash -530973204, now seen corresponding path program 1 times [2023-04-02 23:55:15,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:15,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445355569] [2023-04-02 23:55:15,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:15,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:15,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:16,325 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 23:55:16,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:16,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445355569] [2023-04-02 23:55:16,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445355569] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:16,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:16,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 23:55:16,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907144780] [2023-04-02 23:55:16,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:16,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 23:55:16,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:16,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 23:55:16,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:55:16,372 INFO L87 Difference]: Start difference. First operand has 528 states, 309 states have (on average 1.5048543689320388) internal successors, (465), 336 states have internal predecessors, (465), 160 states have call successors, (160), 46 states have call predecessors, (160), 46 states have return successors, (160), 151 states have call predecessors, (160), 160 states have call successors, (160) Second operand has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20) [2023-04-02 23:55:16,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:16,777 INFO L93 Difference]: Finished difference Result 808 states and 1249 transitions. [2023-04-02 23:55:16,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 23:55:16,780 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20) Word has length 92 [2023-04-02 23:55:16,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:16,800 INFO L225 Difference]: With dead ends: 808 [2023-04-02 23:55:16,800 INFO L226 Difference]: Without dead ends: 436 [2023-04-02 23:55:16,810 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 23:55:16,815 INFO L413 NwaCegarLoop]: 586 mSDtfsCounter, 34 mSDsluCounter, 3492 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 4078 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:16,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 4078 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:55:16,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2023-04-02 23:55:16,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 401. [2023-04-02 23:55:16,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 256 states have (on average 1.546875) internal successors, (396), 275 states have internal predecessors, (396), 105 states have call successors, (105), 42 states have call predecessors, (105), 39 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2023-04-02 23:55:16,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 599 transitions. [2023-04-02 23:55:16,916 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 599 transitions. Word has length 92 [2023-04-02 23:55:16,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:16,917 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 599 transitions. [2023-04-02 23:55:16,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20) [2023-04-02 23:55:16,917 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 599 transitions. [2023-04-02 23:55:16,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-04-02 23:55:16,923 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:16,923 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 23:55:16,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 23:55:16,924 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:16,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:16,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1804946468, now seen corresponding path program 1 times [2023-04-02 23:55:16,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:16,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405332233] [2023-04-02 23:55:16,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:16,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:17,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:17,521 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 23:55:17,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:17,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405332233] [2023-04-02 23:55:17,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405332233] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:17,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:17,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:55:17,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562766236] [2023-04-02 23:55:17,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:17,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:55:17,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:17,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:55:17,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:55:17,524 INFO L87 Difference]: Start difference. First operand 401 states and 599 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) [2023-04-02 23:55:19,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:19,945 INFO L93 Difference]: Finished difference Result 1234 states and 1906 transitions. [2023-04-02 23:55:19,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 23:55:19,945 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) Word has length 97 [2023-04-02 23:55:19,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:19,955 INFO L225 Difference]: With dead ends: 1234 [2023-04-02 23:55:19,956 INFO L226 Difference]: Without dead ends: 875 [2023-04-02 23:55:19,961 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 23:55:19,964 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 1655 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 3141 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1723 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 3626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 3141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:19,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1723 Valid, 606 Invalid, 3626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 3141 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-02 23:55:19,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2023-04-02 23:55:20,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 848. [2023-04-02 23:55:20,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 570 states have (on average 1.587719298245614) internal successors, (905), 605 states have internal predecessors, (905), 204 states have call successors, (204), 72 states have call predecessors, (204), 73 states have return successors, (204), 194 states have call predecessors, (204), 196 states have call successors, (204) [2023-04-02 23:55:20,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1313 transitions. [2023-04-02 23:55:20,033 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1313 transitions. Word has length 97 [2023-04-02 23:55:20,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:20,034 INFO L495 AbstractCegarLoop]: Abstraction has 848 states and 1313 transitions. [2023-04-02 23:55:20,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) [2023-04-02 23:55:20,034 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1313 transitions. [2023-04-02 23:55:20,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-04-02 23:55:20,037 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:20,037 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 23:55:20,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 23:55:20,037 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:20,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:20,038 INFO L85 PathProgramCache]: Analyzing trace with hash -228920113, now seen corresponding path program 1 times [2023-04-02 23:55:20,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:20,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849813612] [2023-04-02 23:55:20,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:20,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:20,270 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 23:55:20,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:20,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849813612] [2023-04-02 23:55:20,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849813612] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:20,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:20,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 23:55:20,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070902302] [2023-04-02 23:55:20,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:20,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:55:20,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:20,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:55:20,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:55:20,272 INFO L87 Difference]: Start difference. First operand 848 states and 1313 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2023-04-02 23:55:20,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:20,419 INFO L93 Difference]: Finished difference Result 1344 states and 2094 transitions. [2023-04-02 23:55:20,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:55:20,419 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) Word has length 101 [2023-04-02 23:55:20,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:20,425 INFO L225 Difference]: With dead ends: 1344 [2023-04-02 23:55:20,425 INFO L226 Difference]: Without dead ends: 870 [2023-04-02 23:55:20,427 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 23:55:20,428 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 7 mSDsluCounter, 1656 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2220 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 23:55:20,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2220 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:55:20,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2023-04-02 23:55:20,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 860. [2023-04-02 23:55:20,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 579 states have (on average 1.5785837651122625) internal successors, (914), 614 states have internal predecessors, (914), 204 states have call successors, (204), 72 states have call predecessors, (204), 76 states have return successors, (210), 197 states have call predecessors, (210), 196 states have call successors, (210) [2023-04-02 23:55:20,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1328 transitions. [2023-04-02 23:55:20,477 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1328 transitions. Word has length 101 [2023-04-02 23:55:20,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:20,477 INFO L495 AbstractCegarLoop]: Abstraction has 860 states and 1328 transitions. [2023-04-02 23:55:20,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2023-04-02 23:55:20,478 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1328 transitions. [2023-04-02 23:55:20,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-02 23:55:20,480 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:20,480 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 23:55:20,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 23:55:20,481 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:20,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:20,481 INFO L85 PathProgramCache]: Analyzing trace with hash -530667865, now seen corresponding path program 1 times [2023-04-02 23:55:20,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:20,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086939956] [2023-04-02 23:55:20,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:20,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:20,902 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 23:55:20,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:20,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086939956] [2023-04-02 23:55:20,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086939956] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:20,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:20,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 23:55:20,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822875099] [2023-04-02 23:55:20,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:20,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 23:55:20,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:20,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 23:55:20,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:55:20,905 INFO L87 Difference]: Start difference. First operand 860 states and 1328 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 7 states have call successors, (26), 5 states have call predecessors, (26), 4 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2023-04-02 23:55:22,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:22,995 INFO L93 Difference]: Finished difference Result 1825 states and 2823 transitions. [2023-04-02 23:55:22,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 23:55:22,996 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 7 states have call successors, (26), 5 states have call predecessors, (26), 4 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) Word has length 105 [2023-04-02 23:55:22,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:23,005 INFO L225 Difference]: With dead ends: 1825 [2023-04-02 23:55:23,005 INFO L226 Difference]: Without dead ends: 1243 [2023-04-02 23:55:23,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:55:23,014 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 1338 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 3121 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1492 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 3539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 3121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:23,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1492 Valid, 448 Invalid, 3539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 3121 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-02 23:55:23,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2023-04-02 23:55:23,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 1193. [2023-04-02 23:55:23,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 788 states have (on average 1.5279187817258884) internal successors, (1204), 840 states have internal predecessors, (1204), 290 states have call successors, (290), 106 states have call predecessors, (290), 114 states have return successors, (306), 282 states have call predecessors, (306), 282 states have call successors, (306) [2023-04-02 23:55:23,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 1800 transitions. [2023-04-02 23:55:23,113 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 1800 transitions. Word has length 105 [2023-04-02 23:55:23,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:23,113 INFO L495 AbstractCegarLoop]: Abstraction has 1193 states and 1800 transitions. [2023-04-02 23:55:23,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 7 states have call successors, (26), 5 states have call predecessors, (26), 4 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2023-04-02 23:55:23,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 1800 transitions. [2023-04-02 23:55:23,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-02 23:55:23,115 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:23,115 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 23:55:23,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 23:55:23,116 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:23,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:23,116 INFO L85 PathProgramCache]: Analyzing trace with hash -452343188, now seen corresponding path program 1 times [2023-04-02 23:55:23,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:23,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620616918] [2023-04-02 23:55:23,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:23,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:23,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:23,416 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 23:55:23,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:23,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620616918] [2023-04-02 23:55:23,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620616918] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:23,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:23,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:55:23,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001723102] [2023-04-02 23:55:23,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:23,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:55:23,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:23,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:55:23,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:55:23,419 INFO L87 Difference]: Start difference. First operand 1193 states and 1800 transitions. Second operand has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-02 23:55:23,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:23,730 INFO L93 Difference]: Finished difference Result 2252 states and 3483 transitions. [2023-04-02 23:55:23,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 23:55:23,731 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) Word has length 108 [2023-04-02 23:55:23,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:23,739 INFO L225 Difference]: With dead ends: 2252 [2023-04-02 23:55:23,739 INFO L226 Difference]: Without dead ends: 1193 [2023-04-02 23:55:23,744 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 23:55:23,746 INFO L413 NwaCegarLoop]: 584 mSDtfsCounter, 211 mSDsluCounter, 2688 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 3272 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:23,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 3272 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:55:23,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2023-04-02 23:55:23,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1193. [2023-04-02 23:55:23,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 788 states have (on average 1.4873096446700507) internal successors, (1172), 840 states have internal predecessors, (1172), 290 states have call successors, (290), 106 states have call predecessors, (290), 114 states have return successors, (306), 282 states have call predecessors, (306), 282 states have call successors, (306) [2023-04-02 23:55:23,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 1768 transitions. [2023-04-02 23:55:23,819 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 1768 transitions. Word has length 108 [2023-04-02 23:55:23,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:23,819 INFO L495 AbstractCegarLoop]: Abstraction has 1193 states and 1768 transitions. [2023-04-02 23:55:23,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-02 23:55:23,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 1768 transitions. [2023-04-02 23:55:23,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-02 23:55:23,822 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:23,823 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 23:55:23,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 23:55:23,823 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:23,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:23,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1487501373, now seen corresponding path program 1 times [2023-04-02 23:55:23,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:23,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010656672] [2023-04-02 23:55:23,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:23,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:23,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:24,227 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 23:55:24,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:24,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010656672] [2023-04-02 23:55:24,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010656672] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:24,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:24,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:55:24,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696932147] [2023-04-02 23:55:24,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:24,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:55:24,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:24,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:55:24,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:55:24,230 INFO L87 Difference]: Start difference. First operand 1193 states and 1768 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2023-04-02 23:55:26,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:26,238 INFO L93 Difference]: Finished difference Result 2121 states and 3153 transitions. [2023-04-02 23:55:26,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 23:55:26,238 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) Word has length 110 [2023-04-02 23:55:26,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:26,246 INFO L225 Difference]: With dead ends: 2121 [2023-04-02 23:55:26,246 INFO L226 Difference]: Without dead ends: 1263 [2023-04-02 23:55:26,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-04-02 23:55:26,251 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 946 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 2911 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1021 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 3285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 2911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:26,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1021 Valid, 499 Invalid, 3285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 2911 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-02 23:55:26,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2023-04-02 23:55:26,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1220. [2023-04-02 23:55:26,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 806 states have (on average 1.4813895781637718) internal successors, (1194), 862 states have internal predecessors, (1194), 291 states have call successors, (291), 111 states have call predecessors, (291), 122 states have return successors, (317), 282 states have call predecessors, (317), 283 states have call successors, (317) [2023-04-02 23:55:26,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 1802 transitions. [2023-04-02 23:55:26,322 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 1802 transitions. Word has length 110 [2023-04-02 23:55:26,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:26,323 INFO L495 AbstractCegarLoop]: Abstraction has 1220 states and 1802 transitions. [2023-04-02 23:55:26,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2023-04-02 23:55:26,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 1802 transitions. [2023-04-02 23:55:26,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-04-02 23:55:26,325 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:26,325 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:55:26,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 23:55:26,326 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:26,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:26,326 INFO L85 PathProgramCache]: Analyzing trace with hash 366407545, now seen corresponding path program 1 times [2023-04-02 23:55:26,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:26,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121314397] [2023-04-02 23:55:26,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:26,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:26,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:26,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 23:55:26,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:26,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121314397] [2023-04-02 23:55:26,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121314397] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:26,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:26,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 23:55:26,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937149617] [2023-04-02 23:55:26,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:26,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 23:55:26,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:26,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 23:55:26,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:55:26,575 INFO L87 Difference]: Start difference. First operand 1220 states and 1802 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 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 23:55:27,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:27,139 INFO L93 Difference]: Finished difference Result 1260 states and 1859 transitions. [2023-04-02 23:55:27,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:55:27,140 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 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 114 [2023-04-02 23:55:27,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:27,148 INFO L225 Difference]: With dead ends: 1260 [2023-04-02 23:55:27,149 INFO L226 Difference]: Without dead ends: 1243 [2023-04-02 23:55:27,150 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 23:55:27,151 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 593 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 1786 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:27,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [594 Valid, 1786 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 23:55:27,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2023-04-02 23:55:27,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 1224. [2023-04-02 23:55:27,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 810 states have (on average 1.4790123456790123) internal successors, (1198), 866 states have internal predecessors, (1198), 291 states have call successors, (291), 111 states have call predecessors, (291), 122 states have return successors, (317), 282 states have call predecessors, (317), 283 states have call successors, (317) [2023-04-02 23:55:27,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1806 transitions. [2023-04-02 23:55:27,226 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1806 transitions. Word has length 114 [2023-04-02 23:55:27,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:27,227 INFO L495 AbstractCegarLoop]: Abstraction has 1224 states and 1806 transitions. [2023-04-02 23:55:27,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 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 23:55:27,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1806 transitions. [2023-04-02 23:55:27,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-04-02 23:55:27,230 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:27,230 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 23:55:27,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 23:55:27,230 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:27,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:27,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1574240102, now seen corresponding path program 1 times [2023-04-02 23:55:27,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:27,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725975810] [2023-04-02 23:55:27,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:27,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:27,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:27,544 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 23:55:27,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:27,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725975810] [2023-04-02 23:55:27,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725975810] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:27,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:27,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 23:55:27,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493857662] [2023-04-02 23:55:27,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:27,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 23:55:27,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:27,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 23:55:27,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:55:27,547 INFO L87 Difference]: Start difference. First operand 1224 states and 1806 transitions. Second operand has 8 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (26), 4 states have call predecessors, (26), 1 states have call successors, (26) [2023-04-02 23:55:27,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:27,764 INFO L93 Difference]: Finished difference Result 1245 states and 1832 transitions. [2023-04-02 23:55:27,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 23:55:27,765 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (26), 4 states have call predecessors, (26), 1 states have call successors, (26) Word has length 122 [2023-04-02 23:55:27,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:27,776 INFO L225 Difference]: With dead ends: 1245 [2023-04-02 23:55:27,776 INFO L226 Difference]: Without dead ends: 1228 [2023-04-02 23:55:27,777 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 23:55:27,779 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 10 mSDsluCounter, 3275 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 3824 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 23:55:27,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 3824 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:55:27,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2023-04-02 23:55:27,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1224. [2023-04-02 23:55:27,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 810 states have (on average 1.4753086419753085) internal successors, (1195), 866 states have internal predecessors, (1195), 291 states have call successors, (291), 111 states have call predecessors, (291), 122 states have return successors, (317), 282 states have call predecessors, (317), 283 states have call successors, (317) [2023-04-02 23:55:27,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1803 transitions. [2023-04-02 23:55:27,858 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1803 transitions. Word has length 122 [2023-04-02 23:55:27,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:27,859 INFO L495 AbstractCegarLoop]: Abstraction has 1224 states and 1803 transitions. [2023-04-02 23:55:27,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (26), 4 states have call predecessors, (26), 1 states have call successors, (26) [2023-04-02 23:55:27,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1803 transitions. [2023-04-02 23:55:27,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-04-02 23:55:27,861 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:27,861 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 23:55:27,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 23:55:27,861 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:27,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:27,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1334104920, now seen corresponding path program 1 times [2023-04-02 23:55:27,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:27,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742560657] [2023-04-02 23:55:27,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:27,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:28,008 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 23:55:28,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:28,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742560657] [2023-04-02 23:55:28,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742560657] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:28,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:28,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 23:55:28,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030663547] [2023-04-02 23:55:28,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:28,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:55:28,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:28,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:55:28,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:55:28,011 INFO L87 Difference]: Start difference. First operand 1224 states and 1803 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:55:28,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:28,193 INFO L93 Difference]: Finished difference Result 3543 states and 5301 transitions. [2023-04-02 23:55:28,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:55:28,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 134 [2023-04-02 23:55:28,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:28,209 INFO L225 Difference]: With dead ends: 3543 [2023-04-02 23:55:28,209 INFO L226 Difference]: Without dead ends: 2361 [2023-04-02 23:55:28,215 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 23:55:28,216 INFO L413 NwaCegarLoop]: 613 mSDtfsCounter, 538 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:28,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 1118 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:55:28,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2023-04-02 23:55:28,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2314. [2023-04-02 23:55:28,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2314 states, 1565 states have (on average 1.4875399361022363) internal successors, (2328), 1673 states have internal predecessors, (2328), 523 states have call successors, (523), 198 states have call predecessors, (523), 225 states have return successors, (604), 496 states have call predecessors, (604), 514 states have call successors, (604) [2023-04-02 23:55:28,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 3455 transitions. [2023-04-02 23:55:28,374 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 3455 transitions. Word has length 134 [2023-04-02 23:55:28,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:28,376 INFO L495 AbstractCegarLoop]: Abstraction has 2314 states and 3455 transitions. [2023-04-02 23:55:28,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:55:28,376 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 3455 transitions. [2023-04-02 23:55:28,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-04-02 23:55:28,379 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:28,379 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 23:55:28,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 23:55:28,379 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:28,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:28,380 INFO L85 PathProgramCache]: Analyzing trace with hash 238316894, now seen corresponding path program 1 times [2023-04-02 23:55:28,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:28,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301710055] [2023-04-02 23:55:28,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:28,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:28,503 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 23:55:28,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:28,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301710055] [2023-04-02 23:55:28,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301710055] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:28,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:28,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 23:55:28,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212883831] [2023-04-02 23:55:28,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:28,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:55:28,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:28,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:55:28,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:55:28,506 INFO L87 Difference]: Start difference. First operand 2314 states and 3455 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-02 23:55:28,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:28,891 INFO L93 Difference]: Finished difference Result 6812 states and 10324 transitions. [2023-04-02 23:55:28,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:55:28,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 138 [2023-04-02 23:55:28,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:28,922 INFO L225 Difference]: With dead ends: 6812 [2023-04-02 23:55:28,922 INFO L226 Difference]: Without dead ends: 4543 [2023-04-02 23:55:28,936 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 23:55:28,936 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 537 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:28,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 1124 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:55:28,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4543 states. [2023-04-02 23:55:29,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4543 to 4495. [2023-04-02 23:55:29,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4495 states, 3076 states have (on average 1.4931729518855656) internal successors, (4593), 3288 states have internal predecessors, (4593), 987 states have call successors, (987), 372 states have call predecessors, (987), 431 states have return successors, (1218), 924 states have call predecessors, (1218), 976 states have call successors, (1218) [2023-04-02 23:55:29,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4495 states to 4495 states and 6798 transitions. [2023-04-02 23:55:29,225 INFO L78 Accepts]: Start accepts. Automaton has 4495 states and 6798 transitions. Word has length 138 [2023-04-02 23:55:29,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:29,225 INFO L495 AbstractCegarLoop]: Abstraction has 4495 states and 6798 transitions. [2023-04-02 23:55:29,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-02 23:55:29,226 INFO L276 IsEmpty]: Start isEmpty. Operand 4495 states and 6798 transitions. [2023-04-02 23:55:29,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-02 23:55:29,229 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:29,229 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 23:55:29,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 23:55:29,229 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:29,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:29,230 INFO L85 PathProgramCache]: Analyzing trace with hash 2079876586, now seen corresponding path program 1 times [2023-04-02 23:55:29,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:29,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782909535] [2023-04-02 23:55:29,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:29,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:29,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:29,334 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 23:55:29,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:29,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782909535] [2023-04-02 23:55:29,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782909535] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:29,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:29,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 23:55:29,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892548942] [2023-04-02 23:55:29,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:29,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:55:29,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:29,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:55:29,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:55:29,337 INFO L87 Difference]: Start difference. First operand 4495 states and 6798 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:55:29,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:29,884 INFO L93 Difference]: Finished difference Result 13351 states and 20570 transitions. [2023-04-02 23:55:29,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:55:29,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 136 [2023-04-02 23:55:29,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:29,951 INFO L225 Difference]: With dead ends: 13351 [2023-04-02 23:55:29,951 INFO L226 Difference]: Without dead ends: 8907 [2023-04-02 23:55:29,977 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 23:55:29,978 INFO L413 NwaCegarLoop]: 619 mSDtfsCounter, 536 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:29,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 1130 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:55:29,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8907 states. [2023-04-02 23:55:30,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8907 to 8858. [2023-04-02 23:55:30,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8858 states, 6099 states have (on average 1.4951631414986064) internal successors, (9119), 6519 states have internal predecessors, (9119), 1915 states have call successors, (1915), 720 states have call predecessors, (1915), 843 states have return successors, (2584), 1780 states have call predecessors, (2584), 1900 states have call successors, (2584) [2023-04-02 23:55:30,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8858 states to 8858 states and 13618 transitions. [2023-04-02 23:55:30,589 INFO L78 Accepts]: Start accepts. Automaton has 8858 states and 13618 transitions. Word has length 136 [2023-04-02 23:55:30,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:30,590 INFO L495 AbstractCegarLoop]: Abstraction has 8858 states and 13618 transitions. [2023-04-02 23:55:30,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:55:30,590 INFO L276 IsEmpty]: Start isEmpty. Operand 8858 states and 13618 transitions. [2023-04-02 23:55:30,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-04-02 23:55:30,593 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:30,593 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 23:55:30,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 23:55:30,593 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:30,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:30,594 INFO L85 PathProgramCache]: Analyzing trace with hash 50406266, now seen corresponding path program 1 times [2023-04-02 23:55:30,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:30,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455395377] [2023-04-02 23:55:30,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:30,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:30,812 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 23:55:30,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:30,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455395377] [2023-04-02 23:55:30,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455395377] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:30,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:30,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 23:55:30,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585527236] [2023-04-02 23:55:30,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:30,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:55:30,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:30,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:55:30,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:55:30,814 INFO L87 Difference]: Start difference. First operand 8858 states and 13618 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:55:31,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:31,886 INFO L93 Difference]: Finished difference Result 26430 states and 41755 transitions. [2023-04-02 23:55:31,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:55:31,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 137 [2023-04-02 23:55:31,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:32,019 INFO L225 Difference]: With dead ends: 26430 [2023-04-02 23:55:32,019 INFO L226 Difference]: Without dead ends: 17635 [2023-04-02 23:55:32,072 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 23:55:32,072 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 535 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:32,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 1136 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:55:32,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17635 states. [2023-04-02 23:55:33,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17635 to 17585. [2023-04-02 23:55:33,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17585 states, 12146 states have (on average 1.4952247653548494) internal successors, (18161), 12982 states have internal predecessors, (18161), 3771 states have call successors, (3771), 1416 states have call predecessors, (3771), 1667 states have return successors, (5802), 3492 states have call predecessors, (5802), 3748 states have call successors, (5802) [2023-04-02 23:55:33,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17585 states to 17585 states and 27734 transitions. [2023-04-02 23:55:33,361 INFO L78 Accepts]: Start accepts. Automaton has 17585 states and 27734 transitions. Word has length 137 [2023-04-02 23:55:33,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:33,361 INFO L495 AbstractCegarLoop]: Abstraction has 17585 states and 27734 transitions. [2023-04-02 23:55:33,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:55:33,362 INFO L276 IsEmpty]: Start isEmpty. Operand 17585 states and 27734 transitions. [2023-04-02 23:55:33,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-04-02 23:55:33,365 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:33,365 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, 1] [2023-04-02 23:55:33,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-02 23:55:33,365 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:33,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:33,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1561339692, now seen corresponding path program 1 times [2023-04-02 23:55:33,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:33,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975327572] [2023-04-02 23:55:33,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:33,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:33,480 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 23:55:33,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:33,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975327572] [2023-04-02 23:55:33,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975327572] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:33,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:55:33,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 23:55:33,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520092853] [2023-04-02 23:55:33,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:33,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:55:33,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:33,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:55:33,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:55:33,483 INFO L87 Difference]: Start difference. First operand 17585 states and 27734 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:55:34,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:34,360 INFO L93 Difference]: Finished difference Result 18727 states and 29704 transitions. [2023-04-02 23:55:34,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:55:34,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 138 [2023-04-02 23:55:34,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:34,500 INFO L225 Difference]: With dead ends: 18727 [2023-04-02 23:55:34,500 INFO L226 Difference]: Without dead ends: 18714 [2023-04-02 23:55:34,519 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 23:55:34,520 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 521 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 1134 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:34,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 1134 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:55:34,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18714 states. [2023-04-02 23:55:35,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18714 to 18665. [2023-04-02 23:55:36,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18665 states, 12894 states have (on average 1.4946486738017684) internal successors, (19272), 13782 states have internal predecessors, (19272), 4002 states have call successors, (4002), 1502 states have call predecessors, (4002), 1768 states have return successors, (6342), 3704 states have call predecessors, (6342), 3979 states have call successors, (6342) [2023-04-02 23:55:36,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18665 states to 18665 states and 29616 transitions. [2023-04-02 23:55:36,121 INFO L78 Accepts]: Start accepts. Automaton has 18665 states and 29616 transitions. Word has length 138 [2023-04-02 23:55:36,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:36,122 INFO L495 AbstractCegarLoop]: Abstraction has 18665 states and 29616 transitions. [2023-04-02 23:55:36,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:55:36,122 INFO L276 IsEmpty]: Start isEmpty. Operand 18665 states and 29616 transitions. [2023-04-02 23:55:36,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2023-04-02 23:55:36,130 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:36,130 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, 1, 1, 1, 1, 1] [2023-04-02 23:55:36,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-02 23:55:36,131 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:36,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:36,131 INFO L85 PathProgramCache]: Analyzing trace with hash 261839350, now seen corresponding path program 1 times [2023-04-02 23:55:36,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:36,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905443401] [2023-04-02 23:55:36,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:36,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:36,491 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 23:55:36,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:36,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905443401] [2023-04-02 23:55:36,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905443401] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:55:36,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204880769] [2023-04-02 23:55:36,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:36,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:55:36,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:55:36,497 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 23:55:36,533 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 23:55:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:37,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 3054 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:55:37,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:55:37,332 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 23:55:37,333 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:55:37,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204880769] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:37,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:55:37,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-04-02 23:55:37,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27984607] [2023-04-02 23:55:37,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:37,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:55:37,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:37,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:55:37,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:55:37,335 INFO L87 Difference]: Start difference. First operand 18665 states and 29616 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2023-04-02 23:55:38,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:38,489 INFO L93 Difference]: Finished difference Result 39276 states and 64132 transitions. [2023-04-02 23:55:38,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:55:38,490 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) Word has length 190 [2023-04-02 23:55:38,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:38,672 INFO L225 Difference]: With dead ends: 39276 [2023-04-02 23:55:38,672 INFO L226 Difference]: Without dead ends: 20654 [2023-04-02 23:55:38,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 192 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 23:55:38,746 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 213 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1425 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 23:55:38,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1425 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:55:38,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20654 states. [2023-04-02 23:55:40,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20654 to 20654. [2023-04-02 23:55:40,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20654 states, 14832 states have (on average 1.5503640776699028) internal successors, (22995), 15720 states have internal predecessors, (22995), 4002 states have call successors, (4002), 1553 states have call predecessors, (4002), 1819 states have return successors, (6342), 3704 states have call predecessors, (6342), 3979 states have call successors, (6342) [2023-04-02 23:55:40,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20654 states to 20654 states and 33339 transitions. [2023-04-02 23:55:40,268 INFO L78 Accepts]: Start accepts. Automaton has 20654 states and 33339 transitions. Word has length 190 [2023-04-02 23:55:40,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:40,268 INFO L495 AbstractCegarLoop]: Abstraction has 20654 states and 33339 transitions. [2023-04-02 23:55:40,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2023-04-02 23:55:40,269 INFO L276 IsEmpty]: Start isEmpty. Operand 20654 states and 33339 transitions. [2023-04-02 23:55:40,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-04-02 23:55:40,277 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:40,277 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, 1, 1, 1, 1, 1] [2023-04-02 23:55:40,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 23:55:40,489 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,SelfDestructingSolverStorable13 [2023-04-02 23:55:40,489 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:40,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:40,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1221491950, now seen corresponding path program 1 times [2023-04-02 23:55:40,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:40,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906025206] [2023-04-02 23:55:40,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:40,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:40,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:42,324 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-04-02 23:55:42,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:42,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906025206] [2023-04-02 23:55:42,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906025206] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:55:42,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057806275] [2023-04-02 23:55:42,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:42,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:55:42,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:55:42,329 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 23:55:42,353 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 23:55:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:42,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 3059 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:55:42,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:55:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-02 23:55:42,919 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:55:42,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057806275] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:42,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:55:42,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [19] total 21 [2023-04-02 23:55:42,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162350560] [2023-04-02 23:55:42,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:42,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:55:42,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:42,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:55:42,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-04-02 23:55:42,921 INFO L87 Difference]: Start difference. First operand 20654 states and 33339 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2023-04-02 23:55:44,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:44,133 INFO L93 Difference]: Finished difference Result 43254 states and 71527 transitions. [2023-04-02 23:55:44,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:55:44,133 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) Word has length 195 [2023-04-02 23:55:44,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:44,277 INFO L225 Difference]: With dead ends: 43254 [2023-04-02 23:55:44,278 INFO L226 Difference]: Without dead ends: 22643 [2023-04-02 23:55:44,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2023-04-02 23:55:44,349 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 211 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1425 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 23:55:44,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1425 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:55:44,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22643 states. [2023-04-02 23:55:45,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22643 to 22643. [2023-04-02 23:55:45,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22643 states, 16770 states have (on average 1.5932021466905189) internal successors, (26718), 17658 states have internal predecessors, (26718), 4002 states have call successors, (4002), 1604 states have call predecessors, (4002), 1870 states have return successors, (6342), 3704 states have call predecessors, (6342), 3979 states have call successors, (6342) [2023-04-02 23:55:45,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22643 states to 22643 states and 37062 transitions. [2023-04-02 23:55:45,562 INFO L78 Accepts]: Start accepts. Automaton has 22643 states and 37062 transitions. Word has length 195 [2023-04-02 23:55:45,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:45,563 INFO L495 AbstractCegarLoop]: Abstraction has 22643 states and 37062 transitions. [2023-04-02 23:55:45,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2023-04-02 23:55:45,563 INFO L276 IsEmpty]: Start isEmpty. Operand 22643 states and 37062 transitions. [2023-04-02 23:55:45,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-04-02 23:55:45,574 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:45,574 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, 1, 1, 1, 1, 1] [2023-04-02 23:55:45,586 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 23:55:45,784 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,SelfDestructingSolverStorable14 [2023-04-02 23:55:45,784 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:45,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:45,785 INFO L85 PathProgramCache]: Analyzing trace with hash 2017120962, now seen corresponding path program 1 times [2023-04-02 23:55:45,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:45,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874544911] [2023-04-02 23:55:45,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:45,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:47,498 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-04-02 23:55:47,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:47,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874544911] [2023-04-02 23:55:47,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874544911] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:55:47,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374185974] [2023-04-02 23:55:47,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:47,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:55:47,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:55:47,500 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 23:55:47,503 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 23:55:47,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:47,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 3063 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:55:47,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:55:48,049 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 23:55:48,049 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:55:48,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374185974] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:48,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:55:48,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [19] total 21 [2023-04-02 23:55:48,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251333376] [2023-04-02 23:55:48,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:48,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:55:48,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:48,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:55:48,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-04-02 23:55:48,051 INFO L87 Difference]: Start difference. First operand 22643 states and 37062 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2023-04-02 23:55:49,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:49,239 INFO L93 Difference]: Finished difference Result 47232 states and 78922 transitions. [2023-04-02 23:55:49,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:55:49,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) Word has length 199 [2023-04-02 23:55:49,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:49,328 INFO L225 Difference]: With dead ends: 47232 [2023-04-02 23:55:49,329 INFO L226 Difference]: Without dead ends: 24632 [2023-04-02 23:55:49,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2023-04-02 23:55:49,381 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 209 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1425 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:49,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1425 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:55:49,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24632 states. [2023-04-02 23:55:50,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24632 to 24632. [2023-04-02 23:55:50,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24632 states, 18708 states have (on average 1.6271648492623476) internal successors, (30441), 19596 states have internal predecessors, (30441), 4002 states have call successors, (4002), 1655 states have call predecessors, (4002), 1921 states have return successors, (6342), 3704 states have call predecessors, (6342), 3979 states have call successors, (6342) [2023-04-02 23:55:50,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24632 states to 24632 states and 40785 transitions. [2023-04-02 23:55:50,569 INFO L78 Accepts]: Start accepts. Automaton has 24632 states and 40785 transitions. Word has length 199 [2023-04-02 23:55:50,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:50,570 INFO L495 AbstractCegarLoop]: Abstraction has 24632 states and 40785 transitions. [2023-04-02 23:55:50,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2023-04-02 23:55:50,570 INFO L276 IsEmpty]: Start isEmpty. Operand 24632 states and 40785 transitions. [2023-04-02 23:55:50,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-04-02 23:55:50,578 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:50,578 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, 1, 1, 1, 1, 1] [2023-04-02 23:55:50,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-02 23:55:50,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:55:50,788 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:50,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:50,788 INFO L85 PathProgramCache]: Analyzing trace with hash -914351908, now seen corresponding path program 1 times [2023-04-02 23:55:50,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:50,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341350925] [2023-04-02 23:55:50,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:50,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-04-02 23:55:52,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:52,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341350925] [2023-04-02 23:55:52,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341350925] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:55:52,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284892888] [2023-04-02 23:55:52,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:52,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:55:52,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:55:52,243 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 23:55:52,245 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 23:55:52,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:52,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 3066 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:55:52,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:55:52,784 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 23:55:52,784 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:55:52,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284892888] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:52,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:55:52,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [19] total 21 [2023-04-02 23:55:52,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545029337] [2023-04-02 23:55:52,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:52,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:55:52,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:52,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:55:52,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-04-02 23:55:52,787 INFO L87 Difference]: Start difference. First operand 24632 states and 40785 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2023-04-02 23:55:53,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:53,812 INFO L93 Difference]: Finished difference Result 51210 states and 86317 transitions. [2023-04-02 23:55:53,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:55:53,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) Word has length 202 [2023-04-02 23:55:53,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:53,924 INFO L225 Difference]: With dead ends: 51210 [2023-04-02 23:55:53,925 INFO L226 Difference]: Without dead ends: 26621 [2023-04-02 23:55:53,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2023-04-02 23:55:53,979 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 207 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1425 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 23:55:53,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1425 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:55:54,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26621 states. [2023-04-02 23:55:55,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26621 to 26621. [2023-04-02 23:55:55,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26621 states, 20646 states have (on average 1.6547515257192678) internal successors, (34164), 21534 states have internal predecessors, (34164), 4002 states have call successors, (4002), 1706 states have call predecessors, (4002), 1972 states have return successors, (6342), 3704 states have call predecessors, (6342), 3979 states have call successors, (6342) [2023-04-02 23:55:55,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26621 states to 26621 states and 44508 transitions. [2023-04-02 23:55:55,118 INFO L78 Accepts]: Start accepts. Automaton has 26621 states and 44508 transitions. Word has length 202 [2023-04-02 23:55:55,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:55:55,118 INFO L495 AbstractCegarLoop]: Abstraction has 26621 states and 44508 transitions. [2023-04-02 23:55:55,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2023-04-02 23:55:55,118 INFO L276 IsEmpty]: Start isEmpty. Operand 26621 states and 44508 transitions. [2023-04-02 23:55:55,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-04-02 23:55:55,125 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:55:55,126 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, 1, 1, 1, 1, 1] [2023-04-02 23:55:55,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 23:55:55,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-02 23:55:55,338 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:55:55,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:55:55,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1893969226, now seen corresponding path program 1 times [2023-04-02 23:55:55,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:55:55,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292306854] [2023-04-02 23:55:55,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:55,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:55:55,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:56,770 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-04-02 23:55:56,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:55:56,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292306854] [2023-04-02 23:55:56,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292306854] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:55:56,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880460010] [2023-04-02 23:55:56,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:55:56,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:55:56,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:55:56,777 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 23:55:56,780 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 23:55:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:55:57,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 3062 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 23:55:57,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:55:57,421 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-04-02 23:55:57,422 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:55:57,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880460010] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:55:57,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:55:57,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [19] total 23 [2023-04-02 23:55:57,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746689097] [2023-04-02 23:55:57,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:55:57,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 23:55:57,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:55:57,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 23:55:57,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2023-04-02 23:55:57,424 INFO L87 Difference]: Start difference. First operand 26621 states and 44508 transitions. Second operand has 6 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (42), 3 states have call predecessors, (42), 4 states have return successors, (38), 4 states have call predecessors, (38), 3 states have call successors, (38) [2023-04-02 23:55:58,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:55:58,777 INFO L93 Difference]: Finished difference Result 56185 states and 94211 transitions. [2023-04-02 23:55:58,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:55:58,778 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (42), 3 states have call predecessors, (42), 4 states have return successors, (38), 4 states have call predecessors, (38), 3 states have call successors, (38) Word has length 204 [2023-04-02 23:55:58,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:55:58,877 INFO L225 Difference]: With dead ends: 56185 [2023-04-02 23:55:58,878 INFO L226 Difference]: Without dead ends: 29652 [2023-04-02 23:55:58,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2023-04-02 23:55:58,926 INFO L413 NwaCegarLoop]: 631 mSDtfsCounter, 317 mSDsluCounter, 1414 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 2045 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 23:55:58,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 2045 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 23:55:58,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29652 states. [2023-04-02 23:56:00,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29652 to 29398. [2023-04-02 23:56:00,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29398 states, 22485 states have (on average 1.6273070936179674) internal successors, (36590), 23410 states have internal predecessors, (36590), 4529 states have call successors, (4529), 2097 states have call predecessors, (4529), 2383 states have return successors, (8119), 4214 states have call predecessors, (8119), 4506 states have call successors, (8119) [2023-04-02 23:56:00,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29398 states to 29398 states and 49238 transitions. [2023-04-02 23:56:00,233 INFO L78 Accepts]: Start accepts. Automaton has 29398 states and 49238 transitions. Word has length 204 [2023-04-02 23:56:00,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:00,234 INFO L495 AbstractCegarLoop]: Abstraction has 29398 states and 49238 transitions. [2023-04-02 23:56:00,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (42), 3 states have call predecessors, (42), 4 states have return successors, (38), 4 states have call predecessors, (38), 3 states have call successors, (38) [2023-04-02 23:56:00,234 INFO L276 IsEmpty]: Start isEmpty. Operand 29398 states and 49238 transitions. [2023-04-02 23:56:00,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2023-04-02 23:56:00,242 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:00,242 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:56:00,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 23:56:00,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-02 23:56:00,453 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:00,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:00,454 INFO L85 PathProgramCache]: Analyzing trace with hash 743199139, now seen corresponding path program 1 times [2023-04-02 23:56:00,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:00,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647976042] [2023-04-02 23:56:00,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:00,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:00,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-04-02 23:56:00,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:00,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647976042] [2023-04-02 23:56:00,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647976042] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:56:00,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103793473] [2023-04-02 23:56:00,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:00,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:56:00,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:56:00,957 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 23:56:00,959 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 23:56:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:01,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 3842 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-02 23:56:01,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:56:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2023-04-02 23:56:01,894 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:56:01,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103793473] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:56:01,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:56:01,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2023-04-02 23:56:01,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769677845] [2023-04-02 23:56:01,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:56:01,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 23:56:01,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:56:01,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 23:56:01,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2023-04-02 23:56:01,896 INFO L87 Difference]: Start difference. First operand 29398 states and 49238 transitions. Second operand has 9 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 5 states have call successors, (45), 4 states have call predecessors, (45), 6 states have return successors, (43), 7 states have call predecessors, (43), 4 states have call successors, (43) [2023-04-02 23:56:06,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:56:06,325 INFO L93 Difference]: Finished difference Result 72236 states and 123396 transitions. [2023-04-02 23:56:06,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 23:56:06,326 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 5 states have call successors, (45), 4 states have call predecessors, (45), 6 states have return successors, (43), 7 states have call predecessors, (43), 4 states have call successors, (43) Word has length 322 [2023-04-02 23:56:06,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:56:06,483 INFO L225 Difference]: With dead ends: 72236 [2023-04-02 23:56:06,483 INFO L226 Difference]: Without dead ends: 42887 [2023-04-02 23:56:06,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2023-04-02 23:56:06,553 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 1638 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 5387 mSolverCounterSat, 626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1777 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 6013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 626 IncrementalHoareTripleChecker+Valid, 5387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-02 23:56:06,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1777 Valid, 738 Invalid, 6013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [626 Valid, 5387 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-02 23:56:06,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42887 states. [2023-04-02 23:56:08,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42887 to 40298. [2023-04-02 23:56:08,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40298 states, 31065 states have (on average 1.6125221310156124) internal successors, (50093), 32315 states have internal predecessors, (50093), 5991 states have call successors, (5991), 2833 states have call predecessors, (5991), 3241 states have return successors, (10709), 5605 states have call predecessors, (10709), 5968 states have call successors, (10709) [2023-04-02 23:56:08,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40298 states to 40298 states and 66793 transitions. [2023-04-02 23:56:08,559 INFO L78 Accepts]: Start accepts. Automaton has 40298 states and 66793 transitions. Word has length 322 [2023-04-02 23:56:08,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:56:08,560 INFO L495 AbstractCegarLoop]: Abstraction has 40298 states and 66793 transitions. [2023-04-02 23:56:08,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 5 states have call successors, (45), 4 states have call predecessors, (45), 6 states have return successors, (43), 7 states have call predecessors, (43), 4 states have call successors, (43) [2023-04-02 23:56:08,560 INFO L276 IsEmpty]: Start isEmpty. Operand 40298 states and 66793 transitions. [2023-04-02 23:56:08,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2023-04-02 23:56:08,568 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:56:08,568 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:56:08,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 23:56:08,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:56:08,775 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:56:08,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:56:08,775 INFO L85 PathProgramCache]: Analyzing trace with hash 215345031, now seen corresponding path program 1 times [2023-04-02 23:56:08,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:56:08,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991373532] [2023-04-02 23:56:08,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:08,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:56:08,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:09,482 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-04-02 23:56:09,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:56:09,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991373532] [2023-04-02 23:56:09,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991373532] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:56:09,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811678707] [2023-04-02 23:56:09,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:56:09,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:56:09,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:56:09,483 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 23:56:09,485 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 23:56:09,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:56:10,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 3828 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 23:56:10,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:56:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 413 trivial. 0 not checked. [2023-04-02 23:56:10,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:56:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 413 trivial. 0 not checked. [2023-04-02 23:56:11,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811678707] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:56:11,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1259116668] [2023-04-02 23:56:11,047 INFO L159 IcfgInterpreter]: Started Sifa with 177 locations of interest [2023-04-02 23:56:11,048 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:56:11,050 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:56:11,054 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:56:11,055 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:56:13,581 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 178 for LOIs [2023-04-02 23:56:14,130 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 232 for LOIs [2023-04-02 23:56:16,720 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 232 for LOIs [2023-04-02 23:56:20,631 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 123071 conjuctions. This might take some time...