./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499e179d-68f8-44d2-89f2-8df1520d6c6c/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499e179d-68f8-44d2-89f2-8df1520d6c6c/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499e179d-68f8-44d2-89f2-8df1520d6c6c/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499e179d-68f8-44d2-89f2-8df1520d6c6c/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499e179d-68f8-44d2-89f2-8df1520d6c6c/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499e179d-68f8-44d2-89f2-8df1520d6c6c/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bff47839034fd9cbb920af5a298a9e1741d5a9c8d5dbee3233345fdc3046fb27 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 14:19:14,925 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 14:19:14,994 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499e179d-68f8-44d2-89f2-8df1520d6c6c/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 14:19:14,999 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 14:19:15,000 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 14:19:15,024 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 14:19:15,025 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 14:19:15,026 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 14:19:15,027 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 14:19:15,027 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 14:19:15,028 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 14:19:15,028 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 14:19:15,029 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 14:19:15,029 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 14:19:15,030 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 14:19:15,030 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 14:19:15,031 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 14:19:15,032 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 14:19:15,032 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 14:19:15,033 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 14:19:15,033 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 14:19:15,034 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 14:19:15,034 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 14:19:15,035 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 14:19:15,035 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 14:19:15,036 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 14:19:15,036 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 14:19:15,036 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 14:19:15,037 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 14:19:15,037 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 14:19:15,037 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 14:19:15,038 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 14:19:15,038 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 14:19:15,038 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 14:19:15,039 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 14:19:15,039 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 14:19:15,039 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 14:19:15,039 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:19:15,039 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 14:19:15,040 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 14:19:15,040 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 14:19:15,040 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 14:19:15,040 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 14:19:15,041 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 14:19:15,041 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 14:19:15,041 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 14:19:15,041 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 14:19:15,041 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499e179d-68f8-44d2-89f2-8df1520d6c6c/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499e179d-68f8-44d2-89f2-8df1520d6c6c/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bff47839034fd9cbb920af5a298a9e1741d5a9c8d5dbee3233345fdc3046fb27 [2023-12-02 14:19:15,275 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 14:19:15,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 14:19:15,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 14:19:15,301 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 14:19:15,301 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 14:19:15,303 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499e179d-68f8-44d2-89f2-8df1520d6c6c/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c [2023-12-02 14:19:18,281 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 14:19:18,567 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 14:19:18,568 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499e179d-68f8-44d2-89f2-8df1520d6c6c/sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c [2023-12-02 14:19:18,590 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499e179d-68f8-44d2-89f2-8df1520d6c6c/bin/utaipan-verify-nQ1chXbOIh/data/1e4a385bf/869f5abe2201484593f2aa2f358ba029/FLAG60246ebda [2023-12-02 14:19:18,606 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499e179d-68f8-44d2-89f2-8df1520d6c6c/bin/utaipan-verify-nQ1chXbOIh/data/1e4a385bf/869f5abe2201484593f2aa2f358ba029 [2023-12-02 14:19:18,610 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 14:19:18,612 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 14:19:18,613 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 14:19:18,614 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 14:19:18,619 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 14:19:18,620 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:19:18" (1/1) ... [2023-12-02 14:19:18,621 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1789833b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:19:18, skipping insertion in model container [2023-12-02 14:19:18,622 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:19:18" (1/1) ... [2023-12-02 14:19:18,707 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:19:19,167 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499e179d-68f8-44d2-89f2-8df1520d6c6c/sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c[63597,63610] [2023-12-02 14:19:19,215 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:19:19,231 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 14:19:19,243 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [48] [2023-12-02 14:19:19,245 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [412] [2023-12-02 14:19:19,245 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [532] [2023-12-02 14:19:19,245 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification1_spec.i","") [567] [2023-12-02 14:19:19,246 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [755] [2023-12-02 14:19:19,246 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [1426] [2023-12-02 14:19:19,246 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1518] [2023-12-02 14:19:19,247 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [3108] [2023-12-02 14:19:19,247 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [3117] [2023-12-02 14:19:19,247 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [3130] [2023-12-02 14:19:19,330 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499e179d-68f8-44d2-89f2-8df1520d6c6c/sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c[63597,63610] [2023-12-02 14:19:19,346 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:19:19,378 INFO L206 MainTranslator]: Completed translation [2023-12-02 14:19:19,378 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:19:19 WrapperNode [2023-12-02 14:19:19,378 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 14:19:19,379 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 14:19:19,379 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 14:19:19,379 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 14:19:19,385 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:19:19" (1/1) ... [2023-12-02 14:19:19,433 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:19:19" (1/1) ... [2023-12-02 14:19:19,480 INFO L138 Inliner]: procedures = 97, calls = 349, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 1166 [2023-12-02 14:19:19,481 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 14:19:19,481 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 14:19:19,481 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 14:19:19,481 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 14:19:19,489 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:19:19" (1/1) ... [2023-12-02 14:19:19,489 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:19:19" (1/1) ... [2023-12-02 14:19:19,496 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:19:19" (1/1) ... [2023-12-02 14:19:19,496 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:19:19" (1/1) ... [2023-12-02 14:19:19,522 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:19:19" (1/1) ... [2023-12-02 14:19:19,538 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:19:19" (1/1) ... [2023-12-02 14:19:19,543 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:19:19" (1/1) ... [2023-12-02 14:19:19,550 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:19:19" (1/1) ... [2023-12-02 14:19:19,559 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 14:19:19,560 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 14:19:19,560 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 14:19:19,561 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 14:19:19,561 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:19:19" (1/1) ... [2023-12-02 14:19:19,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:19:19,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499e179d-68f8-44d2-89f2-8df1520d6c6c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:19:19,615 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499e179d-68f8-44d2-89f2-8df1520d6c6c/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 14:19:19,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499e179d-68f8-44d2-89f2-8df1520d6c6c/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 14:19:19,648 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-12-02 14:19:19,648 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-12-02 14:19:19,648 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-12-02 14:19:19,649 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-12-02 14:19:19,649 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-12-02 14:19:19,649 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-12-02 14:19:19,649 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-12-02 14:19:19,649 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-12-02 14:19:19,649 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-12-02 14:19:19,650 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-12-02 14:19:19,650 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-12-02 14:19:19,650 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-12-02 14:19:19,650 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-12-02 14:19:19,650 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-12-02 14:19:19,650 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-12-02 14:19:19,650 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-12-02 14:19:19,651 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-12-02 14:19:19,651 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-12-02 14:19:19,651 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-12-02 14:19:19,651 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-12-02 14:19:19,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 14:19:19,651 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-12-02 14:19:19,652 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-12-02 14:19:19,652 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-12-02 14:19:19,652 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-12-02 14:19:19,652 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-12-02 14:19:19,652 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-12-02 14:19:19,652 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-12-02 14:19:19,652 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-12-02 14:19:19,653 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-12-02 14:19:19,653 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-12-02 14:19:19,653 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-12-02 14:19:19,653 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-12-02 14:19:19,653 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-12-02 14:19:19,653 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-12-02 14:19:19,653 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-12-02 14:19:19,654 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-12-02 14:19:19,654 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-12-02 14:19:19,654 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-12-02 14:19:19,654 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-12-02 14:19:19,654 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-12-02 14:19:19,654 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-12-02 14:19:19,654 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-12-02 14:19:19,655 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-12-02 14:19:19,655 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-12-02 14:19:19,655 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-12-02 14:19:19,655 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-12-02 14:19:19,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 14:19:19,655 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-12-02 14:19:19,655 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-12-02 14:19:19,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 14:19:19,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 14:19:19,656 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-12-02 14:19:19,656 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-12-02 14:19:19,656 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2023-12-02 14:19:19,656 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2023-12-02 14:19:19,802 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 14:19:19,805 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 14:19:20,870 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 14:19:21,714 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 14:19:21,715 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 14:19:21,717 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:19:21 BoogieIcfgContainer [2023-12-02 14:19:21,717 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 14:19:21,720 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 14:19:21,720 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 14:19:21,723 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 14:19:21,723 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:19:18" (1/3) ... [2023-12-02 14:19:21,724 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2306f226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:19:21, skipping insertion in model container [2023-12-02 14:19:21,724 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:19:19" (2/3) ... [2023-12-02 14:19:21,725 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2306f226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:19:21, skipping insertion in model container [2023-12-02 14:19:21,725 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:19:21" (3/3) ... [2023-12-02 14:19:21,726 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product28.cil.c [2023-12-02 14:19:21,747 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 14:19:21,748 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 14:19:21,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:19:21,820 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=LoopHeads, 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;@4bfa709b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:19:21,820 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 14:19:21,828 INFO L276 IsEmpty]: Start isEmpty. Operand has 390 states, 260 states have (on average 1.5846153846153845) internal successors, (412), 283 states have internal predecessors, (412), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 95 states have call predecessors, (102), 102 states have call successors, (102) [2023-12-02 14:19:21,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-02 14:19:21,843 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:19:21,844 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] [2023-12-02 14:19:21,845 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:19:21,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:19:21,850 INFO L85 PathProgramCache]: Analyzing trace with hash 2133254137, now seen corresponding path program 1 times [2023-12-02 14:19:21,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:19:21,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342808805] [2023-12-02 14:19:21,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:19:21,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:19:22,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:19:22,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 14:19:22,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:19:22,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342808805] [2023-12-02 14:19:22,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342808805] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:19:22,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:19:22,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 14:19:22,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368559093] [2023-12-02 14:19:22,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:19:22,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:19:22,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:19:22,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:19:22,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:19:22,834 INFO L87 Difference]: Start difference. First operand has 390 states, 260 states have (on average 1.5846153846153845) internal successors, (412), 283 states have internal predecessors, (412), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 95 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-02 14:19:25,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:19:25,220 INFO L93 Difference]: Finished difference Result 1260 states and 2036 transitions. [2023-12-02 14:19:25,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:19:25,223 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 54 [2023-12-02 14:19:25,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:19:25,250 INFO L225 Difference]: With dead ends: 1260 [2023-12-02 14:19:25,250 INFO L226 Difference]: Without dead ends: 887 [2023-12-02 14:19:25,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-12-02 14:19:25,263 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 1236 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 1434 mSolverCounterSat, 458 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1304 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 1892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 458 IncrementalHoareTripleChecker+Valid, 1434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:19:25,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1304 Valid, 1021 Invalid, 1892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [458 Valid, 1434 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 14:19:25,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2023-12-02 14:19:25,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 800. [2023-12-02 14:19:25,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 559 states have (on average 1.5992844364937389) internal successors, (894), 589 states have internal predecessors, (894), 195 states have call successors, (195), 44 states have call predecessors, (195), 45 states have return successors, (197), 179 states have call predecessors, (197), 190 states have call successors, (197) [2023-12-02 14:19:25,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1286 transitions. [2023-12-02 14:19:25,438 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1286 transitions. Word has length 54 [2023-12-02 14:19:25,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:19:25,439 INFO L495 AbstractCegarLoop]: Abstraction has 800 states and 1286 transitions. [2023-12-02 14:19:25,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-02 14:19:25,439 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1286 transitions. [2023-12-02 14:19:25,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-12-02 14:19:25,453 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:19:25,453 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:19:25,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 14:19:25,454 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:19:25,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:19:25,454 INFO L85 PathProgramCache]: Analyzing trace with hash 915277658, now seen corresponding path program 1 times [2023-12-02 14:19:25,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:19:25,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009776557] [2023-12-02 14:19:25,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:19:25,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:19:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:19:26,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 14:19:26,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:19:26,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009776557] [2023-12-02 14:19:26,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009776557] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:19:26,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:19:26,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 14:19:26,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826569949] [2023-12-02 14:19:26,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:19:26,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 14:19:26,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:19:26,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 14:19:26,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 14:19:26,108 INFO L87 Difference]: Start difference. First operand 800 states and 1286 transitions. Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2023-12-02 14:19:28,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:19:28,904 INFO L93 Difference]: Finished difference Result 2754 states and 4471 transitions. [2023-12-02 14:19:28,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 14:19:28,905 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 98 [2023-12-02 14:19:28,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:19:28,920 INFO L225 Difference]: With dead ends: 2754 [2023-12-02 14:19:28,920 INFO L226 Difference]: Without dead ends: 1977 [2023-12-02 14:19:28,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2023-12-02 14:19:28,927 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 1367 mSDsluCounter, 1607 mSDsCounter, 0 mSdLazyCounter, 4081 mSolverCounterSat, 662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1443 SdHoareTripleChecker+Valid, 2157 SdHoareTripleChecker+Invalid, 4743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 662 IncrementalHoareTripleChecker+Valid, 4081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:19:28,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1443 Valid, 2157 Invalid, 4743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [662 Valid, 4081 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-02 14:19:28,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2023-12-02 14:19:29,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 1790. [2023-12-02 14:19:29,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1790 states, 1214 states have (on average 1.57166392092257) internal successors, (1908), 1286 states have internal predecessors, (1908), 482 states have call successors, (482), 81 states have call predecessors, (482), 93 states have return successors, (501), 455 states have call predecessors, (501), 477 states have call successors, (501) [2023-12-02 14:19:29,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 2891 transitions. [2023-12-02 14:19:29,105 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 2891 transitions. Word has length 98 [2023-12-02 14:19:29,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:19:29,106 INFO L495 AbstractCegarLoop]: Abstraction has 1790 states and 2891 transitions. [2023-12-02 14:19:29,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2023-12-02 14:19:29,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 2891 transitions. [2023-12-02 14:19:29,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-12-02 14:19:29,112 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:19:29,112 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:19:29,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 14:19:29,113 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:19:29,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:19:29,113 INFO L85 PathProgramCache]: Analyzing trace with hash 272419514, now seen corresponding path program 1 times [2023-12-02 14:19:29,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:19:29,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911645464] [2023-12-02 14:19:29,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:19:29,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:19:29,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:19:29,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 14:19:29,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:19:29,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911645464] [2023-12-02 14:19:29,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911645464] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:19:29,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:19:29,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 14:19:29,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793012012] [2023-12-02 14:19:29,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:19:29,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 14:19:29,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:19:29,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 14:19:29,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 14:19:29,500 INFO L87 Difference]: Start difference. First operand 1790 states and 2891 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2023-12-02 14:19:31,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:19:31,670 INFO L93 Difference]: Finished difference Result 4525 states and 7322 transitions. [2023-12-02 14:19:31,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 14:19:31,671 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 99 [2023-12-02 14:19:31,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:19:31,689 INFO L225 Difference]: With dead ends: 4525 [2023-12-02 14:19:31,690 INFO L226 Difference]: Without dead ends: 2760 [2023-12-02 14:19:31,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-12-02 14:19:31,700 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 1165 mSDsluCounter, 1274 mSDsCounter, 0 mSdLazyCounter, 2246 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1242 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 2690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 2246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 14:19:31,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1242 Valid, 1661 Invalid, 2690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 2246 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 14:19:31,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2023-12-02 14:19:31,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2642. [2023-12-02 14:19:31,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2642 states, 1818 states have (on average 1.5792079207920793) internal successors, (2871), 1917 states have internal predecessors, (2871), 672 states have call successors, (672), 131 states have call predecessors, (672), 151 states have return successors, (719), 637 states have call predecessors, (719), 667 states have call successors, (719) [2023-12-02 14:19:31,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2642 states to 2642 states and 4262 transitions. [2023-12-02 14:19:31,858 INFO L78 Accepts]: Start accepts. Automaton has 2642 states and 4262 transitions. Word has length 99 [2023-12-02 14:19:31,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:19:31,859 INFO L495 AbstractCegarLoop]: Abstraction has 2642 states and 4262 transitions. [2023-12-02 14:19:31,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2023-12-02 14:19:31,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2642 states and 4262 transitions. [2023-12-02 14:19:31,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-02 14:19:31,863 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:19:31,864 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:19:31,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 14:19:31,864 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:19:31,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:19:31,865 INFO L85 PathProgramCache]: Analyzing trace with hash -2117017122, now seen corresponding path program 1 times [2023-12-02 14:19:31,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:19:31,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901892681] [2023-12-02 14:19:31,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:19:31,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:19:31,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:19:32,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 14:19:32,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:19:32,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901892681] [2023-12-02 14:19:32,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901892681] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:19:32,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:19:32,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 14:19:32,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813254474] [2023-12-02 14:19:32,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:19:32,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:19:32,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:19:32,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:19:32,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:19:32,143 INFO L87 Difference]: Start difference. First operand 2642 states and 4262 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 14:19:32,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:19:32,938 INFO L93 Difference]: Finished difference Result 2743 states and 4428 transitions. [2023-12-02 14:19:32,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 14:19:32,939 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 103 [2023-12-02 14:19:32,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:19:32,965 INFO L225 Difference]: With dead ends: 2743 [2023-12-02 14:19:32,965 INFO L226 Difference]: Without dead ends: 2728 [2023-12-02 14:19:32,968 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 [2023-12-02 14:19:32,969 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 668 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 1865 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 14:19:32,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [669 Valid, 1865 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 14:19:32,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2023-12-02 14:19:33,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 2648. [2023-12-02 14:19:33,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 1824 states have (on average 1.5773026315789473) internal successors, (2877), 1923 states have internal predecessors, (2877), 672 states have call successors, (672), 131 states have call predecessors, (672), 151 states have return successors, (719), 637 states have call predecessors, (719), 667 states have call successors, (719) [2023-12-02 14:19:33,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 4268 transitions. [2023-12-02 14:19:33,250 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 4268 transitions. Word has length 103 [2023-12-02 14:19:33,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:19:33,251 INFO L495 AbstractCegarLoop]: Abstraction has 2648 states and 4268 transitions. [2023-12-02 14:19:33,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 14:19:33,252 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 4268 transitions. [2023-12-02 14:19:33,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-12-02 14:19:33,256 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:19:33,256 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:19:33,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 14:19:33,257 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:19:33,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:19:33,258 INFO L85 PathProgramCache]: Analyzing trace with hash 929609603, now seen corresponding path program 1 times [2023-12-02 14:19:33,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:19:33,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687734924] [2023-12-02 14:19:33,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:19:33,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:19:33,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:19:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 14:19:33,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:19:33,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687734924] [2023-12-02 14:19:33,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687734924] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:19:33,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:19:33,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-12-02 14:19:33,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167342744] [2023-12-02 14:19:33,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:19:33,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 14:19:33,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:19:33,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 14:19:33,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-12-02 14:19:33,925 INFO L87 Difference]: Start difference. First operand 2648 states and 4268 transitions. Second operand has 13 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) [2023-12-02 14:19:38,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:19:38,568 INFO L93 Difference]: Finished difference Result 3073 states and 4910 transitions. [2023-12-02 14:19:38,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-12-02 14:19:38,569 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) Word has length 108 [2023-12-02 14:19:38,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:19:38,596 INFO L225 Difference]: With dead ends: 3073 [2023-12-02 14:19:38,596 INFO L226 Difference]: Without dead ends: 3056 [2023-12-02 14:19:38,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2023-12-02 14:19:38,602 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 2669 mSDsluCounter, 3402 mSDsCounter, 0 mSdLazyCounter, 8010 mSolverCounterSat, 1479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2695 SdHoareTripleChecker+Valid, 3953 SdHoareTripleChecker+Invalid, 9489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1479 IncrementalHoareTripleChecker+Valid, 8010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-12-02 14:19:38,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2695 Valid, 3953 Invalid, 9489 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1479 Valid, 8010 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-12-02 14:19:38,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2023-12-02 14:19:38,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2836. [2023-12-02 14:19:38,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2836 states, 1966 states have (on average 1.5768056968463886) internal successors, (3100), 2063 states have internal predecessors, (3100), 689 states have call successors, (689), 161 states have call predecessors, (689), 180 states have return successors, (740), 655 states have call predecessors, (740), 684 states have call successors, (740) [2023-12-02 14:19:38,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2836 states to 2836 states and 4529 transitions. [2023-12-02 14:19:38,866 INFO L78 Accepts]: Start accepts. Automaton has 2836 states and 4529 transitions. Word has length 108 [2023-12-02 14:19:38,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:19:38,866 INFO L495 AbstractCegarLoop]: Abstraction has 2836 states and 4529 transitions. [2023-12-02 14:19:38,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) [2023-12-02 14:19:38,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2836 states and 4529 transitions. [2023-12-02 14:19:38,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-12-02 14:19:38,870 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:19:38,870 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:19:38,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 14:19:38,870 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:19:38,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:19:38,871 INFO L85 PathProgramCache]: Analyzing trace with hash -2075843974, now seen corresponding path program 1 times [2023-12-02 14:19:38,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:19:38,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057578383] [2023-12-02 14:19:38,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:19:38,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:19:38,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:19:42,413 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 14:19:42,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:19:42,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057578383] [2023-12-02 14:19:42,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057578383] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:19:42,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919604081] [2023-12-02 14:19:42,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:19:42,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:19:42,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499e179d-68f8-44d2-89f2-8df1520d6c6c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:19:42,416 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499e179d-68f8-44d2-89f2-8df1520d6c6c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:19:42,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499e179d-68f8-44d2-89f2-8df1520d6c6c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 14:19:42,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:19:42,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 2057 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 14:19:42,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:19:42,994 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 14:19:42,994 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:19:42,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919604081] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:19:42,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:19:42,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [33] total 35 [2023-12-02 14:19:42,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802275414] [2023-12-02 14:19:42,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:19:42,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:19:42,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:19:42,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:19:42,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1083, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 14:19:42,998 INFO L87 Difference]: Start difference. First operand 2836 states and 4529 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2023-12-02 14:19:43,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:19:43,352 INFO L93 Difference]: Finished difference Result 2999 states and 4796 transitions. [2023-12-02 14:19:43,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 14:19:43,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 115 [2023-12-02 14:19:43,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:19:43,376 INFO L225 Difference]: With dead ends: 2999 [2023-12-02 14:19:43,376 INFO L226 Difference]: Without dead ends: 2984 [2023-12-02 14:19:43,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 14:19:43,380 INFO L413 NwaCegarLoop]: 604 mSDtfsCounter, 47 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1764 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:19:43,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1764 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:19:43,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2984 states. [2023-12-02 14:19:43,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2984 to 2850. [2023-12-02 14:19:43,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2850 states, 1980 states have (on average 1.5727272727272728) internal successors, (3114), 2077 states have internal predecessors, (3114), 689 states have call successors, (689), 161 states have call predecessors, (689), 180 states have return successors, (740), 655 states have call predecessors, (740), 684 states have call successors, (740) [2023-12-02 14:19:43,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2850 states to 2850 states and 4543 transitions. [2023-12-02 14:19:43,634 INFO L78 Accepts]: Start accepts. Automaton has 2850 states and 4543 transitions. Word has length 115 [2023-12-02 14:19:43,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:19:43,634 INFO L495 AbstractCegarLoop]: Abstraction has 2850 states and 4543 transitions. [2023-12-02 14:19:43,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2023-12-02 14:19:43,635 INFO L276 IsEmpty]: Start isEmpty. Operand 2850 states and 4543 transitions. [2023-12-02 14:19:43,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-12-02 14:19:43,641 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:19:43,641 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:19:43,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499e179d-68f8-44d2-89f2-8df1520d6c6c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 14:19:43,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499e179d-68f8-44d2-89f2-8df1520d6c6c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:19:43,842 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:19:43,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:19:43,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1850325784, now seen corresponding path program 1 times [2023-12-02 14:19:43,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:19:43,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77366588] [2023-12-02 14:19:43,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:19:43,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:19:43,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:19:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-02 14:19:45,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:19:45,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77366588] [2023-12-02 14:19:45,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77366588] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:19:45,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579204304] [2023-12-02 14:19:45,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:19:45,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:19:45,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499e179d-68f8-44d2-89f2-8df1520d6c6c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:19:45,685 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499e179d-68f8-44d2-89f2-8df1520d6c6c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:19:45,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499e179d-68f8-44d2-89f2-8df1520d6c6c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 14:19:46,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:19:46,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 2121 conjuncts, 83 conjunts are in the unsatisfiable core [2023-12-02 14:19:46,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:19:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 32 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 14:19:47,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:21:47,641 WARN L293 SmtUtils]: Spent 1.82m on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-02 14:23:39,041 WARN L293 SmtUtils]: Spent 1.85m on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-02 14:23:40,010 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-02 14:23:40,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579204304] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:23:40,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1056002177] [2023-12-02 14:23:40,033 INFO L159 IcfgInterpreter]: Started Sifa with 115 locations of interest [2023-12-02 14:23:40,033 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:23:40,037 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:23:40,041 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:23:40,041 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:25:59,309 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 592 for LOIs [2023-12-02 14:26:06,561 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 590 for LOIs