./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6e725f-548d-46b7-996b-660f99018557/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6e725f-548d-46b7-996b-660f99018557/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_5e6e725f-548d-46b7-996b-660f99018557/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6e725f-548d-46b7-996b-660f99018557/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6e725f-548d-46b7-996b-660f99018557/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_5e6e725f-548d-46b7-996b-660f99018557/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 a24bdc0807d94f83606acfe112db107808ae7409e0ad1ecc1d01e9704d0b4ece --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:03:08,842 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:03:08,938 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6e725f-548d-46b7-996b-660f99018557/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 19:03:08,943 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:03:08,943 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:03:08,968 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:03:08,968 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:03:08,969 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:03:08,970 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:03:08,970 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:03:08,971 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:03:08,971 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:03:08,972 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:03:08,972 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 19:03:08,973 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:03:08,973 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:03:08,974 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 19:03:08,974 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 19:03:08,975 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:03:08,975 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 19:03:08,976 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 19:03:08,976 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 19:03:08,977 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:03:08,978 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 19:03:08,978 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 19:03:08,978 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 19:03:08,979 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 19:03:08,979 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:03:08,979 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 19:03:08,980 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:03:08,980 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 19:03:08,981 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 19:03:08,981 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 19:03:08,981 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:03:08,982 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:03:08,982 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:03:08,982 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:03:08,982 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:03:08,982 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:03:08,983 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:03:08,983 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 19:03:08,983 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 19:03:08,983 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 19:03:08,984 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:03:08,984 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 19:03:08,984 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:03:08,984 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:03:08,984 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_5e6e725f-548d-46b7-996b-660f99018557/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6e725f-548d-46b7-996b-660f99018557/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a24bdc0807d94f83606acfe112db107808ae7409e0ad1ecc1d01e9704d0b4ece [2023-12-02 19:03:09,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:03:09,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:03:09,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:03:09,257 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:03:09,257 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:03:09,258 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6e725f-548d-46b7-996b-660f99018557/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c [2023-12-02 19:03:11,996 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:03:12,273 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:03:12,274 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6e725f-548d-46b7-996b-660f99018557/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c [2023-12-02 19:03:12,294 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6e725f-548d-46b7-996b-660f99018557/bin/utaipan-verify-nQ1chXbOIh/data/8270cf767/d90e8164c9fd4c888295912c55b81f0a/FLAG77dfed0b2 [2023-12-02 19:03:12,309 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6e725f-548d-46b7-996b-660f99018557/bin/utaipan-verify-nQ1chXbOIh/data/8270cf767/d90e8164c9fd4c888295912c55b81f0a [2023-12-02 19:03:12,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:03:12,313 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:03:12,314 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:03:12,314 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:03:12,319 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:03:12,320 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:03:12" (1/1) ... [2023-12-02 19:03:12,321 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d6e7393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:03:12, skipping insertion in model container [2023-12-02 19:03:12,321 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:03:12" (1/1) ... [2023-12-02 19:03:12,399 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:03:12,558 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_5e6e725f-548d-46b7-996b-660f99018557/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c[1545,1558] [2023-12-02 19:03:12,852 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:03:12,865 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 19:03:12,875 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [48] [2023-12-02 19:03:12,876 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [57] [2023-12-02 19:03:12,876 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [1490] [2023-12-02 19:03:12,877 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [1849] [2023-12-02 19:03:12,877 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [2515] [2023-12-02 19:03:12,877 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [2881] [2023-12-02 19:03:12,877 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [2894] [2023-12-02 19:03:12,877 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [2985] [2023-12-02 19:03:12,877 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [3104] [2023-12-02 19:03:12,878 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification1_spec.i","") [3139] [2023-12-02 19:03:12,880 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_5e6e725f-548d-46b7-996b-660f99018557/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c[1545,1558] [2023-12-02 19:03:12,959 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:03:12,988 INFO L206 MainTranslator]: Completed translation [2023-12-02 19:03:12,989 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:03:12 WrapperNode [2023-12-02 19:03:12,989 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:03:12,990 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 19:03:12,990 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 19:03:12,990 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 19:03:12,998 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:03:12" (1/1) ... [2023-12-02 19:03:13,023 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:03:12" (1/1) ... [2023-12-02 19:03:13,065 INFO L138 Inliner]: procedures = 88, calls = 329, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 742 [2023-12-02 19:03:13,065 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 19:03:13,066 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 19:03:13,066 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 19:03:13,066 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 19:03:13,076 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:03:12" (1/1) ... [2023-12-02 19:03:13,076 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:03:12" (1/1) ... [2023-12-02 19:03:13,081 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:03:12" (1/1) ... [2023-12-02 19:03:13,082 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:03:12" (1/1) ... [2023-12-02 19:03:13,104 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:03:12" (1/1) ... [2023-12-02 19:03:13,119 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:03:12" (1/1) ... [2023-12-02 19:03:13,125 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:03:12" (1/1) ... [2023-12-02 19:03:13,131 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:03:12" (1/1) ... [2023-12-02 19:03:13,139 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 19:03:13,140 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 19:03:13,141 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 19:03:13,141 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 19:03:13,142 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:03:12" (1/1) ... [2023-12-02 19:03:13,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:03:13,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6e725f-548d-46b7-996b-660f99018557/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:03:13,178 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6e725f-548d-46b7-996b-660f99018557/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 19:03:13,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6e725f-548d-46b7-996b-660f99018557/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 19:03:13,222 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-12-02 19:03:13,223 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-12-02 19:03:13,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 19:03:13,223 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-12-02 19:03:13,223 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-12-02 19:03:13,223 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-12-02 19:03:13,224 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-12-02 19:03:13,224 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-12-02 19:03:13,224 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-12-02 19:03:13,224 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-12-02 19:03:13,224 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-12-02 19:03:13,224 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-12-02 19:03:13,225 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-12-02 19:03:13,225 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-12-02 19:03:13,225 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-12-02 19:03:13,225 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-12-02 19:03:13,225 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-12-02 19:03:13,225 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-12-02 19:03:13,225 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-12-02 19:03:13,226 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-12-02 19:03:13,226 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-12-02 19:03:13,226 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-12-02 19:03:13,226 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-12-02 19:03:13,226 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-12-02 19:03:13,226 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-12-02 19:03:13,227 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-12-02 19:03:13,227 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-12-02 19:03:13,227 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-12-02 19:03:13,227 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-12-02 19:03:13,227 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-12-02 19:03:13,227 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-12-02 19:03:13,228 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-12-02 19:03:13,228 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-12-02 19:03:13,228 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-12-02 19:03:13,228 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-12-02 19:03:13,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 19:03:13,228 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-12-02 19:03:13,229 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-12-02 19:03:13,229 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-12-02 19:03:13,229 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-12-02 19:03:13,229 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-12-02 19:03:13,229 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-12-02 19:03:13,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 19:03:13,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 19:03:13,230 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-12-02 19:03:13,230 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-12-02 19:03:13,368 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 19:03:13,370 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 19:03:14,265 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 19:03:15,103 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 19:03:15,103 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 19:03:15,105 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:03:15 BoogieIcfgContainer [2023-12-02 19:03:15,105 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 19:03:15,108 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 19:03:15,108 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 19:03:15,111 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 19:03:15,111 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:03:12" (1/3) ... [2023-12-02 19:03:15,112 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47dd3ef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:03:15, skipping insertion in model container [2023-12-02 19:03:15,112 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:03:12" (2/3) ... [2023-12-02 19:03:15,112 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47dd3ef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:03:15, skipping insertion in model container [2023-12-02 19:03:15,112 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:03:15" (3/3) ... [2023-12-02 19:03:15,113 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product01.cil.c [2023-12-02 19:03:15,132 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 19:03:15,132 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 19:03:15,209 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:03:15,216 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;@57db8f34, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:03:15,216 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 19:03:15,223 INFO L276 IsEmpty]: Start isEmpty. Operand has 348 states, 236 states have (on average 1.6228813559322033) internal successors, (383), 257 states have internal predecessors, (383), 89 states have call successors, (89), 21 states have call predecessors, (89), 21 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) [2023-12-02 19:03:15,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-02 19:03:15,241 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:03:15,242 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] [2023-12-02 19:03:15,243 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:03:15,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:03:15,248 INFO L85 PathProgramCache]: Analyzing trace with hash 167879830, now seen corresponding path program 1 times [2023-12-02 19:03:15,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:03:15,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984220504] [2023-12-02 19:03:15,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:03:15,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:03:15,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:03:15,984 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 19:03:15,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:03:15,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984220504] [2023-12-02 19:03:15,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984220504] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:03:15,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:03:15,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 19:03:15,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088247120] [2023-12-02 19:03:15,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:03:15,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 19:03:15,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:03:16,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 19:03:16,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:03:16,027 INFO L87 Difference]: Start difference. First operand has 348 states, 236 states have (on average 1.6228813559322033) internal successors, (383), 257 states have internal predecessors, (383), 89 states have call successors, (89), 21 states have call predecessors, (89), 21 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-12-02 19:03:18,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:03:18,457 INFO L93 Difference]: Finished difference Result 1159 states and 1908 transitions. [2023-12-02 19:03:18,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 19:03:18,460 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 62 [2023-12-02 19:03:18,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:03:18,483 INFO L225 Difference]: With dead ends: 1159 [2023-12-02 19:03:18,484 INFO L226 Difference]: Without dead ends: 828 [2023-12-02 19:03:18,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-12-02 19:03:18,495 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 1625 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 2249 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1686 SdHoareTripleChecker+Valid, 1648 SdHoareTripleChecker+Invalid, 2728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 2249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:03:18,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1686 Valid, 1648 Invalid, 2728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 2249 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 19:03:18,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2023-12-02 19:03:18,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 779. [2023-12-02 19:03:18,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 552 states have (on average 1.6431159420289856) internal successors, (907), 587 states have internal predecessors, (907), 184 states have call successors, (184), 40 states have call predecessors, (184), 42 states have return successors, (185), 176 states have call predecessors, (185), 179 states have call successors, (185) [2023-12-02 19:03:18,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1276 transitions. [2023-12-02 19:03:18,624 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1276 transitions. Word has length 62 [2023-12-02 19:03:18,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:03:18,624 INFO L495 AbstractCegarLoop]: Abstraction has 779 states and 1276 transitions. [2023-12-02 19:03:18,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-12-02 19:03:18,625 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1276 transitions. [2023-12-02 19:03:18,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-02 19:03:18,631 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:03:18,631 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] [2023-12-02 19:03:18,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 19:03:18,631 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:03:18,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:03:18,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1048350879, now seen corresponding path program 1 times [2023-12-02 19:03:18,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:03:18,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211735614] [2023-12-02 19:03:18,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:03:18,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:03:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:03:18,915 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 19:03:18,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:03:18,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211735614] [2023-12-02 19:03:18,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211735614] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:03:18,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:03:18,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 19:03:18,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87541965] [2023-12-02 19:03:18,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:03:18,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:03:18,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:03:18,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:03:18,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:03:18,919 INFO L87 Difference]: Start difference. First operand 779 states and 1276 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2023-12-02 19:03:19,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:03:19,105 INFO L93 Difference]: Finished difference Result 1309 states and 2151 transitions. [2023-12-02 19:03:19,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:03:19,106 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 67 [2023-12-02 19:03:19,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:03:19,114 INFO L225 Difference]: With dead ends: 1309 [2023-12-02 19:03:19,114 INFO L226 Difference]: Without dead ends: 849 [2023-12-02 19:03:19,117 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 [2023-12-02 19:03:19,118 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 41 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 2179 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:03:19,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 2179 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:03:19,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2023-12-02 19:03:19,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 791. [2023-12-02 19:03:19,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 561 states have (on average 1.6327985739750446) internal successors, (916), 596 states have internal predecessors, (916), 184 states have call successors, (184), 40 states have call predecessors, (184), 45 states have return successors, (191), 179 states have call predecessors, (191), 179 states have call successors, (191) [2023-12-02 19:03:19,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1291 transitions. [2023-12-02 19:03:19,201 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1291 transitions. Word has length 67 [2023-12-02 19:03:19,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:03:19,201 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1291 transitions. [2023-12-02 19:03:19,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2023-12-02 19:03:19,202 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1291 transitions. [2023-12-02 19:03:19,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-02 19:03:19,205 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:03:19,205 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] [2023-12-02 19:03:19,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 19:03:19,206 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:03:19,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:03:19,207 INFO L85 PathProgramCache]: Analyzing trace with hash 784411399, now seen corresponding path program 1 times [2023-12-02 19:03:19,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:03:19,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908562514] [2023-12-02 19:03:19,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:03:19,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:03:19,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:03:19,635 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 19:03:19,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:03:19,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908562514] [2023-12-02 19:03:19,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908562514] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:03:19,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:03:19,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 19:03:19,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389366403] [2023-12-02 19:03:19,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:03:19,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 19:03:19,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:03:19,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 19:03:19,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-02 19:03:19,638 INFO L87 Difference]: Start difference. First operand 791 states and 1291 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-02 19:03:21,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:03:21,513 INFO L93 Difference]: Finished difference Result 1798 states and 2930 transitions. [2023-12-02 19:03:21,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 19:03:21,514 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 71 [2023-12-02 19:03:21,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:03:21,524 INFO L225 Difference]: With dead ends: 1798 [2023-12-02 19:03:21,524 INFO L226 Difference]: Without dead ends: 1230 [2023-12-02 19:03:21,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-12-02 19:03:21,529 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 1606 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 2189 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1749 SdHoareTripleChecker+Valid, 1418 SdHoareTripleChecker+Invalid, 2791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 2189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-02 19:03:21,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1749 Valid, 1418 Invalid, 2791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 2189 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-02 19:03:21,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2023-12-02 19:03:21,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1136. [2023-12-02 19:03:21,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 794 states have (on average 1.5881612090680102) internal successors, (1261), 846 states have internal predecessors, (1261), 270 states have call successors, (270), 63 states have call predecessors, (270), 71 states have return successors, (286), 263 states have call predecessors, (286), 265 states have call successors, (286) [2023-12-02 19:03:21,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1817 transitions. [2023-12-02 19:03:21,621 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1817 transitions. Word has length 71 [2023-12-02 19:03:21,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:03:21,622 INFO L495 AbstractCegarLoop]: Abstraction has 1136 states and 1817 transitions. [2023-12-02 19:03:21,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-02 19:03:21,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1817 transitions. [2023-12-02 19:03:21,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 19:03:21,625 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:03:21,625 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] [2023-12-02 19:03:21,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 19:03:21,626 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:03:21,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:03:21,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1495754209, now seen corresponding path program 1 times [2023-12-02 19:03:21,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:03:21,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904421751] [2023-12-02 19:03:21,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:03:21,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:03:21,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:03:21,887 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 19:03:21,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:03:21,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904421751] [2023-12-02 19:03:21,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904421751] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:03:21,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:03:21,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 19:03:21,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601489180] [2023-12-02 19:03:21,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:03:21,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:03:21,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:03:21,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:03:21,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:03:21,890 INFO L87 Difference]: Start difference. First operand 1136 states and 1817 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-02 19:03:22,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:03:22,141 INFO L93 Difference]: Finished difference Result 2193 states and 3564 transitions. [2023-12-02 19:03:22,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:03:22,142 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2023-12-02 19:03:22,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:03:22,152 INFO L225 Difference]: With dead ends: 2193 [2023-12-02 19:03:22,152 INFO L226 Difference]: Without dead ends: 1136 [2023-12-02 19:03:22,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:03:22,159 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 221 mSDsluCounter, 1394 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1939 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:03:22,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 1939 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:03:22,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2023-12-02 19:03:22,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1136. [2023-12-02 19:03:22,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 794 states have (on average 1.5478589420654911) internal successors, (1229), 846 states have internal predecessors, (1229), 270 states have call successors, (270), 63 states have call predecessors, (270), 71 states have return successors, (286), 263 states have call predecessors, (286), 265 states have call successors, (286) [2023-12-02 19:03:22,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1785 transitions. [2023-12-02 19:03:22,247 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1785 transitions. Word has length 74 [2023-12-02 19:03:22,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:03:22,248 INFO L495 AbstractCegarLoop]: Abstraction has 1136 states and 1785 transitions. [2023-12-02 19:03:22,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-02 19:03:22,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1785 transitions. [2023-12-02 19:03:22,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 19:03:22,250 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:03:22,250 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] [2023-12-02 19:03:22,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 19:03:22,251 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:03:22,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:03:22,251 INFO L85 PathProgramCache]: Analyzing trace with hash -721302925, now seen corresponding path program 1 times [2023-12-02 19:03:22,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:03:22,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595555728] [2023-12-02 19:03:22,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:03:22,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:03:22,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:03:22,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 19:03:22,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:03:22,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595555728] [2023-12-02 19:03:22,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595555728] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:03:22,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:03:22,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 19:03:22,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847627317] [2023-12-02 19:03:22,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:03:22,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 19:03:22,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:03:22,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 19:03:22,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:03:22,547 INFO L87 Difference]: Start difference. First operand 1136 states and 1785 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2023-12-02 19:03:24,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:03:24,196 INFO L93 Difference]: Finished difference Result 2180 states and 3442 transitions. [2023-12-02 19:03:24,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 19:03:24,197 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 76 [2023-12-02 19:03:24,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:03:24,207 INFO L225 Difference]: With dead ends: 2180 [2023-12-02 19:03:24,207 INFO L226 Difference]: Without dead ends: 1324 [2023-12-02 19:03:24,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 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 19:03:24,212 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 912 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 2022 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 1511 SdHoareTripleChecker+Invalid, 2389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 2022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-02 19:03:24,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [980 Valid, 1511 Invalid, 2389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 2022 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-02 19:03:24,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2023-12-02 19:03:24,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1163. [2023-12-02 19:03:24,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 812 states have (on average 1.54064039408867) internal successors, (1251), 868 states have internal predecessors, (1251), 271 states have call successors, (271), 68 states have call predecessors, (271), 79 states have return successors, (297), 263 states have call predecessors, (297), 266 states have call successors, (297) [2023-12-02 19:03:24,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1819 transitions. [2023-12-02 19:03:24,293 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1819 transitions. Word has length 76 [2023-12-02 19:03:24,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:03:24,294 INFO L495 AbstractCegarLoop]: Abstraction has 1163 states and 1819 transitions. [2023-12-02 19:03:24,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2023-12-02 19:03:24,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1819 transitions. [2023-12-02 19:03:24,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-02 19:03:24,297 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:03:24,297 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 19:03:24,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 19:03:24,297 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:03:24,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:03:24,298 INFO L85 PathProgramCache]: Analyzing trace with hash 269843856, now seen corresponding path program 1 times [2023-12-02 19:03:24,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:03:24,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693038037] [2023-12-02 19:03:24,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:03:24,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:03:24,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:03:24,505 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 19:03:24,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:03:24,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693038037] [2023-12-02 19:03:24,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693038037] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:03:24,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:03:24,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 19:03:24,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815084056] [2023-12-02 19:03:24,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:03:24,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 19:03:24,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:03:24,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 19:03:24,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:03:24,508 INFO L87 Difference]: Start difference. First operand 1163 states and 1819 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 19:03:25,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:03:25,113 INFO L93 Difference]: Finished difference Result 1235 states and 1932 transitions. [2023-12-02 19:03:25,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:03:25,114 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 83 [2023-12-02 19:03:25,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:03:25,121 INFO L225 Difference]: With dead ends: 1235 [2023-12-02 19:03:25,121 INFO L226 Difference]: Without dead ends: 1220 [2023-12-02 19:03:25,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-02 19:03:25,122 INFO L413 NwaCegarLoop]: 501 mSDtfsCounter, 633 mSDsluCounter, 1172 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 1673 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 19:03:25,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 1673 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 19:03:25,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2023-12-02 19:03:25,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1167. [2023-12-02 19:03:25,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 816 states have (on average 1.5379901960784315) internal successors, (1255), 872 states have internal predecessors, (1255), 271 states have call successors, (271), 68 states have call predecessors, (271), 79 states have return successors, (297), 263 states have call predecessors, (297), 266 states have call successors, (297) [2023-12-02 19:03:25,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1823 transitions. [2023-12-02 19:03:25,193 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1823 transitions. Word has length 83 [2023-12-02 19:03:25,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:03:25,194 INFO L495 AbstractCegarLoop]: Abstraction has 1167 states and 1823 transitions. [2023-12-02 19:03:25,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 19:03:25,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1823 transitions. [2023-12-02 19:03:25,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-02 19:03:25,196 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:03:25,196 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 19:03:25,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 19:03:25,196 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:03:25,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:03:25,197 INFO L85 PathProgramCache]: Analyzing trace with hash -505666440, now seen corresponding path program 1 times [2023-12-02 19:03:25,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:03:25,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639889866] [2023-12-02 19:03:25,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:03:25,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:03:25,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:03:25,397 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 19:03:25,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:03:25,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639889866] [2023-12-02 19:03:25,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639889866] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:03:25,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:03:25,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 19:03:25,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169575944] [2023-12-02 19:03:25,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:03:25,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 19:03:25,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:03:25,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 19:03:25,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:03:25,399 INFO L87 Difference]: Start difference. First operand 1167 states and 1823 transitions. Second operand has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-02 19:03:25,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:03:25,577 INFO L93 Difference]: Finished difference Result 1186 states and 1847 transitions. [2023-12-02 19:03:25,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 19:03:25,578 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) Word has length 88 [2023-12-02 19:03:25,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:03:25,585 INFO L225 Difference]: With dead ends: 1186 [2023-12-02 19:03:25,585 INFO L226 Difference]: Without dead ends: 1171 [2023-12-02 19:03:25,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:03:25,586 INFO L413 NwaCegarLoop]: 511 mSDtfsCounter, 41 mSDsluCounter, 1995 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 2506 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:03:25,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 2506 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:03:25,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2023-12-02 19:03:25,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1167. [2023-12-02 19:03:25,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 816 states have (on average 1.5343137254901962) internal successors, (1252), 872 states have internal predecessors, (1252), 271 states have call successors, (271), 68 states have call predecessors, (271), 79 states have return successors, (297), 263 states have call predecessors, (297), 266 states have call successors, (297) [2023-12-02 19:03:25,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1820 transitions. [2023-12-02 19:03:25,678 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1820 transitions. Word has length 88 [2023-12-02 19:03:25,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:03:25,678 INFO L495 AbstractCegarLoop]: Abstraction has 1167 states and 1820 transitions. [2023-12-02 19:03:25,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-02 19:03:25,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1820 transitions. [2023-12-02 19:03:25,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-02 19:03:25,680 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:03:25,680 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-02 19:03:25,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 19:03:25,680 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:03:25,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:03:25,680 INFO L85 PathProgramCache]: Analyzing trace with hash -355919872, now seen corresponding path program 1 times [2023-12-02 19:03:25,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:03:25,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899337539] [2023-12-02 19:03:25,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:03:25,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:03:25,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:03:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 19:03:26,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:03:26,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899337539] [2023-12-02 19:03:26,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899337539] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:03:26,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197822991] [2023-12-02 19:03:26,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:03:26,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:03:26,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6e725f-548d-46b7-996b-660f99018557/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:03:26,923 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6e725f-548d-46b7-996b-660f99018557/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:03:26,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6e725f-548d-46b7-996b-660f99018557/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 19:03:27,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:03:27,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 1763 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 19:03:27,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:03:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 19:03:29,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:04:02,049 WARN L293 SmtUtils]: Spent 32.27s on a formula simplification. DAG size of input: 766 DAG size of output: 43 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-02 19:04:35,563 WARN L293 SmtUtils]: Spent 31.30s on a formula simplification. DAG size of input: 766 DAG size of output: 43 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-02 19:05:06,741 WARN L293 SmtUtils]: Spent 30.76s on a formula simplification. DAG size of input: 766 DAG size of output: 43 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-02 19:05:06,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 19:05:06,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197822991] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:05:06,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [295656242] [2023-12-02 19:05:06,843 INFO L159 IcfgInterpreter]: Started Sifa with 83 locations of interest [2023-12-02 19:05:06,843 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:05:06,847 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:05:06,852 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:05:06,852 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:05:23,429 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 574 for LOIs [2023-12-02 19:06:02,055 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 574 for LOIs [2023-12-02 19:06:34,231 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 437 for LOIs [2023-12-02 19:06:42,197 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 444 for LOIs [2023-12-02 19:06:42,806 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 583 for LOIs [2023-12-02 19:06:55,881 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 467 for LOIs [2023-12-02 19:06:57,302 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 445 for LOIs [2023-12-02 19:07:01,472 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 447 for LOIs [2023-12-02 19:07:02,671 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 546 for LOIs [2023-12-02 19:07:13,999 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 638 for LOIs [2023-12-02 19:07:18,795 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 515 for LOIs [2023-12-02 19:07:20,545 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:07:40,293 WARN L293 SmtUtils]: Spent 6.50s on a formula simplification. DAG size of input: 559 DAG size of output: 525 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:08:03,078 WARN L293 SmtUtils]: Spent 12.50s on a formula simplification. DAG size of input: 638 DAG size of output: 598 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:08:37,216 WARN L293 SmtUtils]: Spent 5.14s on a formula simplification. DAG size of input: 444 DAG size of output: 444 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:08:44,539 WARN L293 SmtUtils]: Spent 6.93s on a formula simplification. DAG size of input: 484 DAG size of output: 457 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:09:15,450 WARN L293 SmtUtils]: Spent 5.12s on a formula simplification. DAG size of input: 459 DAG size of output: 439 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:10:08,358 WARN L293 SmtUtils]: Spent 10.64s on a formula simplification. DAG size of input: 635 DAG size of output: 628 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:10:19,889 WARN L293 SmtUtils]: Spent 10.74s on a formula simplification. DAG size of input: 644 DAG size of output: 637 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:10:31,223 WARN L293 SmtUtils]: Spent 10.54s on a formula simplification. DAG size of input: 646 DAG size of output: 639 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:10:42,724 WARN L293 SmtUtils]: Spent 10.63s on a formula simplification. DAG size of input: 648 DAG size of output: 641 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:10:54,037 WARN L293 SmtUtils]: Spent 10.43s on a formula simplification. DAG size of input: 650 DAG size of output: 643 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:11:05,197 WARN L293 SmtUtils]: Spent 10.26s on a formula simplification. DAG size of input: 652 DAG size of output: 622 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:11:16,355 WARN L293 SmtUtils]: Spent 10.22s on a formula simplification. DAG size of input: 654 DAG size of output: 624 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:11:27,614 WARN L293 SmtUtils]: Spent 10.41s on a formula simplification. DAG size of input: 650 DAG size of output: 620 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:11:35,497 WARN L293 SmtUtils]: Spent 7.19s on a formula simplification. DAG size of input: 501 DAG size of output: 474 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:11:43,390 WARN L293 SmtUtils]: Spent 7.21s on a formula simplification. DAG size of input: 503 DAG size of output: 476 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:11:51,093 WARN L293 SmtUtils]: Spent 6.99s on a formula simplification. DAG size of input: 505 DAG size of output: 478 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:11:58,595 WARN L293 SmtUtils]: Spent 6.84s on a formula simplification. DAG size of input: 467 DAG size of output: 440 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:12:06,220 WARN L293 SmtUtils]: Spent 6.96s on a formula simplification. DAG size of input: 471 DAG size of output: 444 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:12:13,906 WARN L293 SmtUtils]: Spent 6.97s on a formula simplification. DAG size of input: 507 DAG size of output: 480 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:12:21,767 WARN L293 SmtUtils]: Spent 7.11s on a formula simplification. DAG size of input: 507 DAG size of output: 480 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:12:29,997 WARN L293 SmtUtils]: Spent 7.45s on a formula simplification. DAG size of input: 510 DAG size of output: 483 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:12:38,377 WARN L293 SmtUtils]: Spent 7.58s on a formula simplification. DAG size of input: 513 DAG size of output: 486 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:12:46,594 WARN L293 SmtUtils]: Spent 7.42s on a formula simplification. DAG size of input: 519 DAG size of output: 492 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:12:55,170 WARN L293 SmtUtils]: Spent 7.70s on a formula simplification. DAG size of input: 523 DAG size of output: 496 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:12:55,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [295656242] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:12:55,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:12:55,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [14, 12, 12] total 85 [2023-12-02 19:12:55,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164246755] [2023-12-02 19:12:55,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:12:55,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-12-02 19:12:55,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:12:55,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-12-02 19:12:55,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=774, Invalid=6366, Unknown=0, NotChecked=0, Total=7140 [2023-12-02 19:12:55,180 INFO L87 Difference]: Start difference. First operand 1167 states and 1820 transitions. Second operand has 57 states, 46 states have (on average 1.173913043478261) internal successors, (54), 37 states have internal predecessors, (54), 16 states have call successors, (17), 11 states have call predecessors, (17), 11 states have return successors, (16), 16 states have call predecessors, (16), 15 states have call successors, (16) [2023-12-02 19:13:01,337 WARN L293 SmtUtils]: Spent 5.31s on a formula simplification. DAG size of input: 592 DAG size of output: 585 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:13:06,866 WARN L293 SmtUtils]: Spent 5.14s on a formula simplification. DAG size of input: 605 DAG size of output: 591 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:14:12,951 WARN L293 SmtUtils]: Spent 5.20s on a formula simplification. DAG size of input: 641 DAG size of output: 608 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:14:29,858 WARN L293 SmtUtils]: Spent 10.34s on a formula simplification. DAG size of input: 477 DAG size of output: 442 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:14:40,712 WARN L293 SmtUtils]: Spent 10.52s on a formula simplification. DAG size of input: 489 DAG size of output: 449 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:15:46,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:15:46,030 INFO L93 Difference]: Finished difference Result 2768 states and 4344 transitions. [2023-12-02 19:15:46,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-12-02 19:15:46,031 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 46 states have (on average 1.173913043478261) internal successors, (54), 37 states have internal predecessors, (54), 16 states have call successors, (17), 11 states have call predecessors, (17), 11 states have return successors, (16), 16 states have call predecessors, (16), 15 states have call successors, (16) Word has length 92 [2023-12-02 19:15:46,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:15:46,040 INFO L225 Difference]: With dead ends: 2768 [2023-12-02 19:15:46,040 INFO L226 Difference]: Without dead ends: 1624 [2023-12-02 19:15:46,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 399.3s TimeCoverageRelationStatistics Valid=929, Invalid=8191, Unknown=0, NotChecked=0, Total=9120 [2023-12-02 19:15:46,047 INFO L413 NwaCegarLoop]: 575 mSDtfsCounter, 494 mSDsluCounter, 9100 mSDsCounter, 0 mSdLazyCounter, 22518 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 102.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 9675 SdHoareTripleChecker+Invalid, 22593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 22518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 105.9s IncrementalHoareTripleChecker+Time [2023-12-02 19:15:46,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 9675 Invalid, 22593 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [75 Valid, 22518 Invalid, 0 Unknown, 0 Unchecked, 105.9s Time] [2023-12-02 19:15:46,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1624 states. [2023-12-02 19:15:46,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1624 to 1512. [2023-12-02 19:15:46,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1089 states have (on average 1.512396694214876) internal successors, (1647), 1148 states have internal predecessors, (1647), 321 states have call successors, (321), 87 states have call predecessors, (321), 101 states have return successors, (355), 313 states have call predecessors, (355), 316 states have call successors, (355) [2023-12-02 19:15:46,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 2323 transitions. [2023-12-02 19:15:46,646 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 2323 transitions. Word has length 92 [2023-12-02 19:15:46,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:15:46,647 INFO L495 AbstractCegarLoop]: Abstraction has 1512 states and 2323 transitions. [2023-12-02 19:15:46,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 46 states have (on average 1.173913043478261) internal successors, (54), 37 states have internal predecessors, (54), 16 states have call successors, (17), 11 states have call predecessors, (17), 11 states have return successors, (16), 16 states have call predecessors, (16), 15 states have call successors, (16) [2023-12-02 19:15:46,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 2323 transitions. [2023-12-02 19:15:46,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-12-02 19:15:46,650 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:15:46,650 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-02 19:15:46,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6e725f-548d-46b7-996b-660f99018557/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 19:15:46,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6e725f-548d-46b7-996b-660f99018557/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 19:15:46,852 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:15:46,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:15:46,853 INFO L85 PathProgramCache]: Analyzing trace with hash 445852869, now seen corresponding path program 1 times [2023-12-02 19:15:46,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:15:46,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650147115] [2023-12-02 19:15:46,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:15:46,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:15:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:15:47,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 19:15:47,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:15:47,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650147115] [2023-12-02 19:15:47,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650147115] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:15:47,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:15:47,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 19:15:47,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874938876] [2023-12-02 19:15:47,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:15:47,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 19:15:47,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:15:47,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 19:15:47,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-02 19:15:47,335 INFO L87 Difference]: Start difference. First operand 1512 states and 2323 transitions. Second operand has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 6 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) [2023-12-02 19:15:49,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:15:49,350 INFO L93 Difference]: Finished difference Result 2990 states and 4709 transitions. [2023-12-02 19:15:49,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 19:15:49,351 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 6 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) Word has length 94 [2023-12-02 19:15:49,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:15:49,365 INFO L225 Difference]: With dead ends: 2990 [2023-12-02 19:15:49,365 INFO L226 Difference]: Without dead ends: 2108 [2023-12-02 19:15:49,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-12-02 19:15:49,370 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 914 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 2652 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 1734 SdHoareTripleChecker+Invalid, 2970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 2652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 19:15:49,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [996 Valid, 1734 Invalid, 2970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 2652 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 19:15:49,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2023-12-02 19:15:49,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1837. [2023-12-02 19:15:49,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1284 states have (on average 1.5124610591900312) internal successors, (1942), 1370 states have internal predecessors, (1942), 438 states have call successors, (438), 96 states have call predecessors, (438), 114 states have return successors, (483), 430 states have call predecessors, (483), 433 states have call successors, (483) [2023-12-02 19:15:49,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 2863 transitions. [2023-12-02 19:15:49,933 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 2863 transitions. Word has length 94 [2023-12-02 19:15:49,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:15:49,933 INFO L495 AbstractCegarLoop]: Abstraction has 1837 states and 2863 transitions. [2023-12-02 19:15:49,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 6 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) [2023-12-02 19:15:49,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 2863 transitions. [2023-12-02 19:15:49,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-02 19:15:49,936 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:15:49,936 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-02 19:15:49,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 19:15:49,936 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:15:49,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:15:49,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1367904397, now seen corresponding path program 1 times [2023-12-02 19:15:49,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:15:49,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760644634] [2023-12-02 19:15:49,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:15:49,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:15:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:15:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 19:15:50,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:15:50,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760644634] [2023-12-02 19:15:50,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760644634] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:15:50,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:15:50,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:15:50,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373842402] [2023-12-02 19:15:50,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:15:50,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:15:50,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:15:50,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:15:50,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:15:50,062 INFO L87 Difference]: Start difference. First operand 1837 states and 2863 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-12-02 19:15:50,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:15:50,817 INFO L93 Difference]: Finished difference Result 4734 states and 7504 transitions. [2023-12-02 19:15:50,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:15:50,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 93 [2023-12-02 19:15:50,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:15:50,836 INFO L225 Difference]: With dead ends: 4734 [2023-12-02 19:15:50,836 INFO L226 Difference]: Without dead ends: 3271 [2023-12-02 19:15:50,842 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 [2023-12-02 19:15:50,843 INFO L413 NwaCegarLoop]: 969 mSDtfsCounter, 491 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 1456 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:15:50,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 1456 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:15:50,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3271 states. [2023-12-02 19:15:51,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3271 to 3268. [2023-12-02 19:15:51,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3268 states, 2263 states have (on average 1.5178965974370304) internal successors, (3435), 2425 states have internal predecessors, (3435), 804 states have call successors, (804), 167 states have call predecessors, (804), 200 states have return successors, (907), 795 states have call predecessors, (907), 799 states have call successors, (907) [2023-12-02 19:15:51,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3268 states to 3268 states and 5146 transitions. [2023-12-02 19:15:51,423 INFO L78 Accepts]: Start accepts. Automaton has 3268 states and 5146 transitions. Word has length 93 [2023-12-02 19:15:51,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:15:51,424 INFO L495 AbstractCegarLoop]: Abstraction has 3268 states and 5146 transitions. [2023-12-02 19:15:51,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-12-02 19:15:51,424 INFO L276 IsEmpty]: Start isEmpty. Operand 3268 states and 5146 transitions. [2023-12-02 19:15:51,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-02 19:15:51,427 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:15:51,427 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-02 19:15:51,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 19:15:51,427 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:15:51,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:15:51,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1163581197, now seen corresponding path program 1 times [2023-12-02 19:15:51,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:15:51,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444706683] [2023-12-02 19:15:51,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:15:51,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:15:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:15:52,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 19:15:52,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:15:52,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444706683] [2023-12-02 19:15:52,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444706683] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:15:52,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252435608] [2023-12-02 19:15:52,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:15:52,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:15:52,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6e725f-548d-46b7-996b-660f99018557/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:15:52,217 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6e725f-548d-46b7-996b-660f99018557/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:15:52,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6e725f-548d-46b7-996b-660f99018557/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 19:15:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:15:52,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 1766 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 19:15:52,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:15:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 19:15:54,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:16:26,531 WARN L293 SmtUtils]: Spent 32.28s on a formula simplification. DAG size of input: 766 DAG size of output: 43 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-02 19:17:03,462 WARN L293 SmtUtils]: Spent 33.59s on a formula simplification. DAG size of input: 766 DAG size of output: 43 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition)