./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product32.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_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/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_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/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_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/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 d29c49d66a80c5cce6b00f5730e0d825d56678e7df63108e14ba577a66cb87d7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:08:18,826 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:08:18,900 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 18:08:18,905 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:08:18,905 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:08:18,931 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:08:18,932 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:08:18,933 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:08:18,933 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:08:18,934 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:08:18,934 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:08:18,935 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:08:18,935 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:08:18,936 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 18:08:18,936 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:08:18,937 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:08:18,937 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 18:08:18,938 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 18:08:18,938 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:08:18,939 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 18:08:18,939 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 18:08:18,940 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 18:08:18,941 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:08:18,941 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 18:08:18,941 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 18:08:18,942 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:08:18,942 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 18:08:18,942 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:08:18,943 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 18:08:18,943 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:08:18,943 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 18:08:18,944 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 18:08:18,944 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 18:08:18,944 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:08:18,945 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:08:18,945 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:08:18,945 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:08:18,945 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:08:18,945 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:08:18,946 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:08:18,946 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 18:08:18,946 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 18:08:18,946 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 18:08:18,946 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:08:18,947 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 18:08:18,947 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:08:18,947 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:08:18,947 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_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d29c49d66a80c5cce6b00f5730e0d825d56678e7df63108e14ba577a66cb87d7 [2023-12-02 18:08:19,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:08:19,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:08:19,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:08:19,225 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:08:19,225 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:08:19,227 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c [2023-12-02 18:08:22,003 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:08:22,321 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:08:22,322 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c [2023-12-02 18:08:22,343 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/bin/utaipan-verify-nQ1chXbOIh/data/6be3b27a5/117a0b7764704c54b402fb915502bedb/FLAGe722a9205 [2023-12-02 18:08:22,358 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/bin/utaipan-verify-nQ1chXbOIh/data/6be3b27a5/117a0b7764704c54b402fb915502bedb [2023-12-02 18:08:22,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:08:22,362 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:08:22,363 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:08:22,363 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:08:22,368 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:08:22,369 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:08:22" (1/1) ... [2023-12-02 18:08:22,370 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12b4c1e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:08:22, skipping insertion in model container [2023-12-02 18:08:22,371 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:08:22" (1/1) ... [2023-12-02 18:08:22,453 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:08:22,664 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_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c[4316,4329] [2023-12-02 18:08:22,911 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:08:22,924 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:08:22,934 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [48] [2023-12-02 18:08:22,936 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [169] [2023-12-02 18:08:22,936 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [185] [2023-12-02 18:08:22,936 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [194] [2023-12-02 18:08:22,936 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [1871] [2023-12-02 18:08:22,937 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [2228] [2023-12-02 18:08:22,937 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification1_spec.i","") [2263] [2023-12-02 18:08:22,937 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [2444] [2023-12-02 18:08:22,937 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2810] [2023-12-02 18:08:22,937 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [3475] [2023-12-02 18:08:22,943 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_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c[4316,4329] [2023-12-02 18:08:23,031 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:08:23,063 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:08:23,064 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:08:23 WrapperNode [2023-12-02 18:08:23,064 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:08:23,065 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:08:23,065 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:08:23,065 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:08:23,073 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:08:23" (1/1) ... [2023-12-02 18:08:23,105 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:08:23" (1/1) ... [2023-12-02 18:08:23,151 INFO L138 Inliner]: procedures = 99, calls = 356, calls flagged for inlining = 29, calls inlined = 25, statements flattened = 969 [2023-12-02 18:08:23,151 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:08:23,152 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:08:23,152 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:08:23,152 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:08:23,161 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:08:23" (1/1) ... [2023-12-02 18:08:23,161 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:08:23" (1/1) ... [2023-12-02 18:08:23,168 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:08:23" (1/1) ... [2023-12-02 18:08:23,169 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:08:23" (1/1) ... [2023-12-02 18:08:23,193 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:08:23" (1/1) ... [2023-12-02 18:08:23,210 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:08:23" (1/1) ... [2023-12-02 18:08:23,217 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:08:23" (1/1) ... [2023-12-02 18:08:23,224 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:08:23" (1/1) ... [2023-12-02 18:08:23,234 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:08:23,235 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:08:23,235 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:08:23,236 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:08:23,236 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:08:23" (1/1) ... [2023-12-02 18:08:23,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:08:23,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:08:23,274 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:08:23,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:08:23,313 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-12-02 18:08:23,313 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-12-02 18:08:23,313 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-12-02 18:08:23,313 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-12-02 18:08:23,313 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-12-02 18:08:23,314 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-12-02 18:08:23,314 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-12-02 18:08:23,314 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-12-02 18:08:23,314 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-12-02 18:08:23,314 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-12-02 18:08:23,314 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-12-02 18:08:23,315 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-12-02 18:08:23,315 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-12-02 18:08:23,315 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-12-02 18:08:23,315 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-12-02 18:08:23,315 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-12-02 18:08:23,315 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-12-02 18:08:23,316 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-12-02 18:08:23,316 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-12-02 18:08:23,316 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-12-02 18:08:23,316 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-12-02 18:08:23,316 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-12-02 18:08:23,317 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-12-02 18:08:23,317 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-12-02 18:08:23,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:08:23,317 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-12-02 18:08:23,317 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-12-02 18:08:23,317 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-12-02 18:08:23,318 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-12-02 18:08:23,318 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-12-02 18:08:23,318 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-12-02 18:08:23,318 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-12-02 18:08:23,318 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-12-02 18:08:23,318 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-12-02 18:08:23,319 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-12-02 18:08:23,319 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-12-02 18:08:23,319 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-12-02 18:08:23,319 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-12-02 18:08:23,319 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-12-02 18:08:23,319 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-12-02 18:08:23,320 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-12-02 18:08:23,320 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-12-02 18:08:23,320 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-12-02 18:08:23,320 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-12-02 18:08:23,320 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-12-02 18:08:23,320 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-12-02 18:08:23,321 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-12-02 18:08:23,321 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-12-02 18:08:23,321 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-12-02 18:08:23,321 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-12-02 18:08:23,321 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-12-02 18:08:23,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 18:08:23,322 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-12-02 18:08:23,322 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-12-02 18:08:23,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:08:23,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:08:23,322 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-12-02 18:08:23,322 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-12-02 18:08:23,323 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2023-12-02 18:08:23,323 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2023-12-02 18:08:23,475 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:08:23,478 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:08:24,525 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:08:25,424 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:08:25,425 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 18:08:25,427 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:08:25 BoogieIcfgContainer [2023-12-02 18:08:25,427 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:08:25,430 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:08:25,430 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:08:25,433 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:08:25,433 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:08:22" (1/3) ... [2023-12-02 18:08:25,434 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1822d077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:08:25, skipping insertion in model container [2023-12-02 18:08:25,434 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:08:23" (2/3) ... [2023-12-02 18:08:25,434 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1822d077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:08:25, skipping insertion in model container [2023-12-02 18:08:25,435 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:08:25" (3/3) ... [2023-12-02 18:08:25,436 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product32.cil.c [2023-12-02 18:08:25,456 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:08:25,456 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 18:08:25,518 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:08:25,525 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;@285b7ca0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:08:25,525 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 18:08:25,532 INFO L276 IsEmpty]: Start isEmpty. Operand has 413 states, 275 states have (on average 1.5672727272727274) internal successors, (431), 298 states have internal predecessors, (431), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 101 states have call predecessors, (108), 108 states have call successors, (108) [2023-12-02 18:08:25,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-02 18:08:25,547 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:08:25,547 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:08:25,548 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:08:25,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:08:25,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1359182888, now seen corresponding path program 1 times [2023-12-02 18:08:25,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:08:25,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869525503] [2023-12-02 18:08:25,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:08:25,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:08:25,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:08:26,403 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 18:08:26,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:08:26,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869525503] [2023-12-02 18:08:26,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869525503] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:08:26,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:08:26,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 18:08:26,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902312676] [2023-12-02 18:08:26,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:08:26,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:08:26,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:08:26,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:08:26,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:08:26,446 INFO L87 Difference]: Start difference. First operand has 413 states, 275 states have (on average 1.5672727272727274) internal successors, (431), 298 states have internal predecessors, (431), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 101 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-02 18:08:28,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:08:28,926 INFO L93 Difference]: Finished difference Result 1329 states and 2129 transitions. [2023-12-02 18:08:28,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:08:28,928 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 54 [2023-12-02 18:08:28,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:08:28,954 INFO L225 Difference]: With dead ends: 1329 [2023-12-02 18:08:28,955 INFO L226 Difference]: Without dead ends: 933 [2023-12-02 18:08:28,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:08:28,967 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 1701 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1775 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 2122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:08:28,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1775 Valid, 903 Invalid, 2122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [663 Valid, 1459 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-12-02 18:08:28,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2023-12-02 18:08:29,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 846. [2023-12-02 18:08:29,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 589 states have (on average 1.5823429541595926) internal successors, (932), 619 states have internal predecessors, (932), 207 states have call successors, (207), 48 states have call predecessors, (207), 49 states have return successors, (209), 191 states have call predecessors, (209), 202 states have call successors, (209) [2023-12-02 18:08:29,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1348 transitions. [2023-12-02 18:08:29,111 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1348 transitions. Word has length 54 [2023-12-02 18:08:29,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:08:29,112 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 1348 transitions. [2023-12-02 18:08:29,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-02 18:08:29,113 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1348 transitions. [2023-12-02 18:08:29,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-12-02 18:08:29,124 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:08:29,125 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:08:29,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 18:08:29,125 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:08:29,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:08:29,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1020386867, now seen corresponding path program 1 times [2023-12-02 18:08:29,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:08:29,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777095213] [2023-12-02 18:08:29,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:08:29,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:08:29,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:08:29,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 18:08:29,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:08:29,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777095213] [2023-12-02 18:08:29,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777095213] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:08:29,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:08:29,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 18:08:29,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388876959] [2023-12-02 18:08:29,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:08:29,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:08:29,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:08:29,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:08:29,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:08:29,716 INFO L87 Difference]: Start difference. First operand 846 states and 1348 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2023-12-02 18:08:31,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:08:31,787 INFO L93 Difference]: Finished difference Result 2624 states and 4232 transitions. [2023-12-02 18:08:31,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 18:08:31,788 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 99 [2023-12-02 18:08:31,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:08:31,804 INFO L225 Difference]: With dead ends: 2624 [2023-12-02 18:08:31,805 INFO L226 Difference]: Without dead ends: 1802 [2023-12-02 18:08:31,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-12-02 18:08:31,812 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 1229 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 2410 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1312 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 2881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 2410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:08:31,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1312 Valid, 1659 Invalid, 2881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 2410 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 18:08:31,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2023-12-02 18:08:31,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1715. [2023-12-02 18:08:31,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1715 states, 1206 states have (on average 1.5887230514096187) internal successors, (1916), 1262 states have internal predecessors, (1916), 409 states have call successors, (409), 92 states have call predecessors, (409), 99 states have return successors, (436), 384 states have call predecessors, (436), 404 states have call successors, (436) [2023-12-02 18:08:31,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1715 states to 1715 states and 2761 transitions. [2023-12-02 18:08:31,979 INFO L78 Accepts]: Start accepts. Automaton has 1715 states and 2761 transitions. Word has length 99 [2023-12-02 18:08:31,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:08:31,980 INFO L495 AbstractCegarLoop]: Abstraction has 1715 states and 2761 transitions. [2023-12-02 18:08:31,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2023-12-02 18:08:31,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1715 states and 2761 transitions. [2023-12-02 18:08:31,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-02 18:08:31,986 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:08:31,986 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:08:31,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 18:08:31,986 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:08:31,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:08:31,987 INFO L85 PathProgramCache]: Analyzing trace with hash -2039789219, now seen corresponding path program 1 times [2023-12-02 18:08:31,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:08:31,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136150417] [2023-12-02 18:08:31,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:08:31,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:08:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:08:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 18:08:32,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:08:32,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136150417] [2023-12-02 18:08:32,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136150417] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:08:32,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:08:32,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 18:08:32,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932656501] [2023-12-02 18:08:32,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:08:32,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 18:08:32,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:08:32,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 18:08:32,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:08:32,558 INFO L87 Difference]: Start difference. First operand 1715 states and 2761 transitions. Second operand has 9 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2023-12-02 18:08:35,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:08:35,643 INFO L93 Difference]: Finished difference Result 4328 states and 6952 transitions. [2023-12-02 18:08:35,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 18:08:35,644 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) Word has length 102 [2023-12-02 18:08:35,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:08:35,664 INFO L225 Difference]: With dead ends: 4328 [2023-12-02 18:08:35,665 INFO L226 Difference]: Without dead ends: 2636 [2023-12-02 18:08:35,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-12-02 18:08:35,677 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 1065 mSDsluCounter, 2236 mSDsCounter, 0 mSdLazyCounter, 5371 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1139 SdHoareTripleChecker+Valid, 2829 SdHoareTripleChecker+Invalid, 5707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 5371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-02 18:08:35,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1139 Valid, 2829 Invalid, 5707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 5371 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-02 18:08:35,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2023-12-02 18:08:35,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2553. [2023-12-02 18:08:35,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2553 states, 1780 states have (on average 1.5719101123595505) internal successors, (2798), 1858 states have internal predecessors, (2798), 615 states have call successors, (615), 138 states have call predecessors, (615), 157 states have return successors, (660), 589 states have call predecessors, (660), 610 states have call successors, (660) [2023-12-02 18:08:35,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2553 states to 2553 states and 4073 transitions. [2023-12-02 18:08:35,892 INFO L78 Accepts]: Start accepts. Automaton has 2553 states and 4073 transitions. Word has length 102 [2023-12-02 18:08:35,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:08:35,893 INFO L495 AbstractCegarLoop]: Abstraction has 2553 states and 4073 transitions. [2023-12-02 18:08:35,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2023-12-02 18:08:35,893 INFO L276 IsEmpty]: Start isEmpty. Operand 2553 states and 4073 transitions. [2023-12-02 18:08:35,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-02 18:08:35,897 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:08:35,897 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:08:35,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 18:08:35,898 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:08:35,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:08:35,898 INFO L85 PathProgramCache]: Analyzing trace with hash 604984836, now seen corresponding path program 1 times [2023-12-02 18:08:35,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:08:35,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762090698] [2023-12-02 18:08:35,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:08:35,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:08:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:08:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 18:08:36,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:08:36,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762090698] [2023-12-02 18:08:36,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762090698] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:08:36,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:08:36,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 18:08:36,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307374828] [2023-12-02 18:08:36,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:08:36,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:08:36,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:08:36,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:08:36,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:08:36,236 INFO L87 Difference]: Start difference. First operand 2553 states and 4073 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 18:08:37,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:08:37,043 INFO L93 Difference]: Finished difference Result 2654 states and 4241 transitions. [2023-12-02 18:08:37,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:08:37,044 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 103 [2023-12-02 18:08:37,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:08:37,058 INFO L225 Difference]: With dead ends: 2654 [2023-12-02 18:08:37,058 INFO L226 Difference]: Without dead ends: 2639 [2023-12-02 18:08:37,059 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 18:08:37,061 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 729 mSDsluCounter, 1366 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1957 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:08:37,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 1957 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 18:08:37,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2023-12-02 18:08:37,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 2559. [2023-12-02 18:08:37,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2559 states, 1786 states have (on average 1.5699888017917134) internal successors, (2804), 1864 states have internal predecessors, (2804), 615 states have call successors, (615), 138 states have call predecessors, (615), 157 states have return successors, (660), 589 states have call predecessors, (660), 610 states have call successors, (660) [2023-12-02 18:08:37,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2559 states to 2559 states and 4079 transitions. [2023-12-02 18:08:37,205 INFO L78 Accepts]: Start accepts. Automaton has 2559 states and 4079 transitions. Word has length 103 [2023-12-02 18:08:37,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:08:37,206 INFO L495 AbstractCegarLoop]: Abstraction has 2559 states and 4079 transitions. [2023-12-02 18:08:37,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 18:08:37,206 INFO L276 IsEmpty]: Start isEmpty. Operand 2559 states and 4079 transitions. [2023-12-02 18:08:37,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-12-02 18:08:37,210 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:08:37,210 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:08:37,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 18:08:37,210 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:08:37,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:08:37,211 INFO L85 PathProgramCache]: Analyzing trace with hash -197132796, now seen corresponding path program 1 times [2023-12-02 18:08:37,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:08:37,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915440763] [2023-12-02 18:08:37,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:08:37,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:08:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:08:37,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 18:08:37,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:08:37,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915440763] [2023-12-02 18:08:37,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915440763] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:08:37,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:08:37,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 18:08:37,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688360986] [2023-12-02 18:08:37,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:08:37,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:08:37,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:08:37,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:08:37,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:08:37,521 INFO L87 Difference]: Start difference. First operand 2559 states and 4079 transitions. Second operand has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20) [2023-12-02 18:08:38,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:08:38,236 INFO L93 Difference]: Finished difference Result 2704 states and 4284 transitions. [2023-12-02 18:08:38,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 18:08:38,236 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20) Word has length 108 [2023-12-02 18:08:38,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:08:38,250 INFO L225 Difference]: With dead ends: 2704 [2023-12-02 18:08:38,251 INFO L226 Difference]: Without dead ends: 2689 [2023-12-02 18:08:38,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-12-02 18:08:38,253 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 662 mSDsluCounter, 2268 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 2862 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:08:38,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [664 Valid, 2862 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 18:08:38,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2689 states. [2023-12-02 18:08:38,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2689 to 2635. [2023-12-02 18:08:38,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 1838 states have (on average 1.5625680087051144) internal successors, (2872), 1916 states have internal predecessors, (2872), 631 states have call successors, (631), 146 states have call predecessors, (631), 165 states have return successors, (686), 605 states have call predecessors, (686), 626 states have call successors, (686) [2023-12-02 18:08:38,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 4189 transitions. [2023-12-02 18:08:38,436 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 4189 transitions. Word has length 108 [2023-12-02 18:08:38,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:08:38,437 INFO L495 AbstractCegarLoop]: Abstraction has 2635 states and 4189 transitions. [2023-12-02 18:08:38,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20) [2023-12-02 18:08:38,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 4189 transitions. [2023-12-02 18:08:38,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-12-02 18:08:38,440 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:08:38,440 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:08:38,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 18:08:38,441 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:08:38,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:08:38,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1803786760, now seen corresponding path program 1 times [2023-12-02 18:08:38,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:08:38,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122556915] [2023-12-02 18:08:38,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:08:38,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:08:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:08:42,395 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 18:08:42,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:08:42,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122556915] [2023-12-02 18:08:42,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122556915] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:08:42,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461898044] [2023-12-02 18:08:42,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:08:42,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:08:42,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:08:42,398 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:08:42,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 18:08:42,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:08:42,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 2057 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:08:42,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:08:42,897 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 18:08:42,897 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:08:42,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461898044] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:08:42,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:08:42,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 28 [2023-12-02 18:08:42,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707693110] [2023-12-02 18:08:42,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:08:42,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:08:42,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:08:42,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:08:42,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2023-12-02 18:08:42,900 INFO L87 Difference]: Start difference. First operand 2635 states and 4189 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2023-12-02 18:08:43,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:08:43,207 INFO L93 Difference]: Finished difference Result 2795 states and 4460 transitions. [2023-12-02 18:08:43,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:08:43,208 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 115 [2023-12-02 18:08:43,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:08:43,229 INFO L225 Difference]: With dead ends: 2795 [2023-12-02 18:08:43,229 INFO L226 Difference]: Without dead ends: 2780 [2023-12-02 18:08:43,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2023-12-02 18:08:43,233 INFO L413 NwaCegarLoop]: 633 mSDtfsCounter, 47 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1851 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:08:43,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1851 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:08:43,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2780 states. [2023-12-02 18:08:43,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2780 to 2651. [2023-12-02 18:08:43,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2651 states, 1854 states have (on average 1.557713052858684) internal successors, (2888), 1932 states have internal predecessors, (2888), 631 states have call successors, (631), 146 states have call predecessors, (631), 165 states have return successors, (686), 605 states have call predecessors, (686), 626 states have call successors, (686) [2023-12-02 18:08:43,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2651 states to 2651 states and 4205 transitions. [2023-12-02 18:08:43,488 INFO L78 Accepts]: Start accepts. Automaton has 2651 states and 4205 transitions. Word has length 115 [2023-12-02 18:08:43,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:08:43,488 INFO L495 AbstractCegarLoop]: Abstraction has 2651 states and 4205 transitions. [2023-12-02 18:08:43,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2023-12-02 18:08:43,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2651 states and 4205 transitions. [2023-12-02 18:08:43,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-12-02 18:08:43,494 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:08:43,494 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:08:43,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 18:08:43,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 18:08:43,695 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:08:43,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:08:43,696 INFO L85 PathProgramCache]: Analyzing trace with hash 482855583, now seen corresponding path program 1 times [2023-12-02 18:08:43,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:08:43,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150591404] [2023-12-02 18:08:43,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:08:43,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:08:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:08:44,831 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-02 18:08:44,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:08:44,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150591404] [2023-12-02 18:08:44,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150591404] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:08:44,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41053673] [2023-12-02 18:08:44,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:08:44,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:08:44,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:08:44,833 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:08:44,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 18:08:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:08:45,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 2121 conjuncts, 87 conjunts are in the unsatisfiable core [2023-12-02 18:08:45,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:08:46,876 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 32 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 18:08:46,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:10:49,067 WARN L293 SmtUtils]: Spent 1.81m on a formula simplification. DAG size of input: 1445 DAG size of output: 55 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-02 18:12:38,636 WARN L293 SmtUtils]: Spent 1.82m on a formula simplification. DAG size of input: 1445 DAG size of output: 55 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-02 18:12:39,762 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-02 18:12:39,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41053673] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:12:39,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1104788692] [2023-12-02 18:12:39,786 INFO L159 IcfgInterpreter]: Started Sifa with 115 locations of interest [2023-12-02 18:12:39,786 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:12:39,790 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:12:39,795 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:12:39,796 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:12:59,692 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 444 for LOIs [2023-12-02 18:12:59,958 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 590 for LOIs [2023-12-02 18:13:30,548 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 590 for LOIs [2023-12-02 18:13:44,807 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 574 for LOIs [2023-12-02 18:14:15,768 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 457 for LOIs [2023-12-02 18:14:23,550 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 458 for LOIs [2023-12-02 18:14:32,859 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 29 for LOIs [2023-12-02 18:14:32,888 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 441 for LOIs [2023-12-02 18:14:33,201 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 22 for LOIs [2023-12-02 18:14:33,204 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 595 for LOIs [2023-12-02 18:14:48,254 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 421 for LOIs [2023-12-02 18:14:48,553 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 476 for LOIs [2023-12-02 18:15:01,360 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 472 for LOIs [2023-12-02 18:15:02,677 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 558 for LOIs [2023-12-02 18:15:14,302 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 650 for LOIs [2023-12-02 18:15:19,390 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 527 for LOIs [2023-12-02 18:15:21,265 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:15:45,855 WARN L293 SmtUtils]: Spent 7.02s on a formula simplification. DAG size of input: 571 DAG size of output: 537 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:15:51,251 WARN L293 SmtUtils]: Spent 5.02s on a formula simplification that was a NOOP. DAG size: 597 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:15:56,696 WARN L293 SmtUtils]: Spent 5.02s on a formula simplification that was a NOOP. DAG size: 597 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:16:10,482 WARN L293 SmtUtils]: Spent 13.15s on a formula simplification. DAG size of input: 650 DAG size of output: 610 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:17:10,050 WARN L293 SmtUtils]: Spent 7.72s on a formula simplification. DAG size of input: 458 DAG size of output: 458 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:18:22,398 WARN L293 SmtUtils]: Spent 7.14s on a formula simplification that was a NOOP. DAG size: 609 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:18:30,349 WARN L293 SmtUtils]: Spent 7.02s on a formula simplification that was a NOOP. DAG size: 609 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:18:53,068 WARN L293 SmtUtils]: Spent 5.02s on a formula simplification that was a NOOP. DAG size: 478 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:18:58,993 WARN L293 SmtUtils]: Spent 5.04s on a formula simplification that was a NOOP. DAG size: 480 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:21:05,085 WARN L293 SmtUtils]: Spent 6.17s on a formula simplification. DAG size of input: 516 DAG size of output: 491 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:21:12,454 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39935#(and (not (= ~currentFloorID~0 0)) (= (select (select |#memory_int| 23) 0) 32) (= (select |#length| 32) 30) (= 6 (select |#length| 18)) (= 116 (select (select |#memory_int| 7) 2)) (= (select |#valid| 30) 1) (= (select (select |#memory_int| 20) 1) 37) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= (select |#valid| 15) 1) (= ~executiveFloor~0 4) (= (select |#length| 21) 4) (= (select (select |#memory_int| 21) 1) 37) (<= 0 (+ ~currentFloorID~0 2147483648)) (<= 1 |#StackHeapBarrier|) (= (select (select |#memory_int| 23) 1) 37) (= (select (select |#memory_int| 20) 3) 0) (= (select (select |#memory_int| 22) 3) 0) (= (select (select |#memory_int| 5) 3) 0) (= 4 (select |#length| 16)) (= 3 (select |#length| 10)) (= ~floorButtons_3~0 0) (= (select |#length| 37) 25) (= (select (select |#memory_int| 22) 0) 32) (= (select (select |#memory_int| 13) 3) 0) (= (select |#valid| 26) 1) (= (select |#length| 4) 10) (= 9 (select |#length| 30)) (= (select |#length| 8) 3) (= (select |#length| 6) 4) (= (select (select |#memory_int| 13) 1) 37) (= (select |#valid| 35) 1) (= (select |#valid| 9) 1) (= (select (select |#memory_int| 18) 5) 0) (= (select (select |#memory_int| 20) 0) 32) (= 25 (select |#length| 34)) (= (select (select |#memory_int| 6) 0) 91) (= (select |#valid| 11) 1) (= (select |#length| 9) 10) (not (= ~currentFloorID~0 1)) (= (select |#valid| 27) 1) (= 9 (select |#length| 36)) (= (select (select |#memory_int| 8) 0) 37) (= (select |#valid| 33) 1) (= 73 (select (select |#memory_int| 12) 1)) (= (select (select |#memory_int| 22) 1) 37) (<= ~currentFloorID~0 2147483647) (= (select (select |#memory_int| 23) 2) 105) (= (select (select |#memory_int| 10) 0) 117) (= ~calls_3~0 0) (= (select (select |#memory_int| 19) 2) 105) (not (= ~currentFloorID~0 4)) (= 9 (select |#length| 25)) (= (select |#length| 15) 4) (= ~calls_0~0 0) (= 31 (select |#length| 2)) (= (select (select |#memory_int| 19) 1) 37) (= ~head~0.offset 0) (= 7 (select |#length| 12)) (= (select (select |#memory_int| 22) 2) 105) (= 2 (select |#length| 1)) (= (select (select |#memory_int| 16) 2) 105) (= (select (select |#memory_int| 17) 2) 105) (= (select |#length| 19) 4) (= (select |#valid| 3) 1) (= (select |#valid| 7) 1) (= ~floorButtons_4~0 0) (= (select (select |#memory_int| 18) 4) 58) (= (select |#valid| 18) 1) (= ~calls_1~0 0) (= 91 (select (select |#memory_int| 5) 0)) (= (select |#valid| 22) 1) (= 30 (select |#length| 26)) (= 70 (select (select |#memory_int| 18) 1)) (= 5 (select |#length| 7)) (= (select |#valid| 24) 1) (= (select (select |#memory_int| 19) 3) 0) (= 32 (select (select |#memory_int| 7) 0)) (not (= ~landingButtons_spc1_0~0 0)) (= (select (select |#memory_int| 17) 3) 0) (= (select (select |#memory_int| 5) 1) 95) (= (select |#valid| 12) 1) (= (select |#valid| 32) 1) (= ~floorButtons_2~0 0) (= (select |#valid| 28) 1) (= (select |#length| 17) 4) (= (select |#valid| 37) 1) (= (select (select |#memory_int| 13) 2) 105) (= 112 (select (select |#memory_int| 12) 4)) (= (select |#valid| 4) 1) (= (select (select |#memory_int| 16) 1) 37) (= (select (select |#memory_int| 20) 2) 105) (= 112 (select (select |#memory_int| 10) 1)) (= (select (select |#memory_int| 8) 2) 0) (= (select (select |#memory_int| 21) 2) 105) (= 0 (select (select |#memory_int| 7) 4)) (= (select |#length| 13) 4) (= 5 (select |#length| 11)) (= (select (select |#memory_int| 17) 1) 37) (= (select (select |#memory_int| 6) 1) 93) (= (select |#valid| 1) 1) (= (select |#valid| 20) 1) (= ~floorButtons_1~0 0) (= (select |#length| 24) 2) (= (select (select |#memory_int| 12) 6) 0) (= (select |#valid| 21) 1) (= (select (select |#memory_int| 11) 0) 100) (= (select (select |#memory_int| 24) 0) 10) (= ~floorButtons_0~0 0) (= 97 (select (select |#memory_int| 7) 1)) (= (select (select |#memory_int| 15) 1) 37) (= (select |#length| 5) 4) (= (select |#valid| 14) 1) (= 112 (select (select |#memory_int| 18) 3)) (= 119 (select (select |#memory_int| 11) 2)) (= (select |#valid| 0) 0) (= (select (select |#memory_int| 12) 5) 58) (= (select (select |#memory_int| 16) 0) 32) (= (select |#valid| 25) 1) (= ~head~0.base 0) (= (select (select |#memory_int| 14) 3) 0) (= (select (select |#memory_int| 23) 3) 0) (= 95 (select (select |#memory_int| 12) 3)) (= 105 (select (select |#memory_int| 14) 2)) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 14) 1) 37) (not (= ~currentFloorID~0 2)) (= (select |#valid| 36) 1) (= (select (select |#memory_int| 10) 2) 0) (= (select |#length| 33) 9) (= (select |#length| 27) 9) (= (select (select |#memory_int| 1) 0) 48) (= ~blocked~0 0) (= (select (select |#memory_int| 11) 1) 111) (= (select |#valid| 23) 1) (= 32 (select (select |#memory_int| 7) 3)) (= 30 (select |#length| 35)) (= 4 (select |#length| 23)) (= (select (select |#memory_int| 24) 1) 0) (= (select |#length| 20) 4) (= (select (select |#memory_int| 21) 3) 0) (= 76 (select (select |#memory_int| 12) 2)) (= (select |#valid| 19) 1) (= (select (select |#memory_int| 15) 0) 32) (= 32 (select (select |#memory_int| 13) 0)) (= (select |#valid| 31) 1) (= (select |#valid| 34) 1) (= (select (select |#memory_int| 6) 3) 0) (= (select |#valid| 16) 1) (= (select (select |#memory_int| 15) 2) 105) (= 32 (select (select |#memory_int| 17) 0)) (= 21 (select |#length| 31)) (not (= ~currentFloorID~0 3)) (= (select |#valid| 6) 1) (= (select (select |#memory_int| 15) 3) 0) (= (select (select |#memory_int| 1) 1) 0) (= (select (select |#memory_int| 5) 2) 93) (= (select |#length| 28) 21) (= (select (select |#memory_int| 14) 0) 32) (= ~calls_2~0 0) (= ~calls_4~0 0) (= (select |#valid| 29) 1) (= ~maximumWeight~0 100) (= (select (select |#memory_int| 6) 2) 32) (= 32 (select (select |#memory_int| 12) 0)) (= (select |#valid| 17) 1) (= (select (select |#memory_int| 16) 3) 0) (= (select |#valid| 10) 1) (= (select |#valid| 8) 1) (= (select (select |#memory_int| 11) 4) 0) (= 32 (select (select |#memory_int| 19) 0)) (= (select (select |#memory_int| 18) 2) 95) (= 4 (select |#length| 14)) (= 30 (select |#length| 29)) (= (select |#valid| 13) 1) (= ~cleanupTimeShifts~0 12) (= (select |#length| 22) 4) (= 32 (select (select |#memory_int| 18) 0)) (= (select (select |#memory_int| 8) 1) 105) (= (select (select |#memory_int| 11) 3) 110) (= 32 (select (select |#memory_int| 21) 0)))' at error location [2023-12-02 18:21:12,455 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:21:12,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:21:12,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23, 20] total 53 [2023-12-02 18:21:12,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916293125] [2023-12-02 18:21:12,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:21:12,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-12-02 18:21:12,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:21:12,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-12-02 18:21:12,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1651, Invalid=18941, Unknown=0, NotChecked=0, Total=20592 [2023-12-02 18:21:12,465 INFO L87 Difference]: Start difference. First operand 2651 states and 4205 transitions. Second operand has 53 states, 39 states have (on average 4.794871794871795) internal successors, (187), 41 states have internal predecessors, (187), 20 states have call successors, (63), 10 states have call predecessors, (63), 24 states have return successors, (64), 25 states have call predecessors, (64), 19 states have call successors, (64) [2023-12-02 18:21:45,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:21:45,911 INFO L93 Difference]: Finished difference Result 15886 states and 25578 transitions. [2023-12-02 18:21:45,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2023-12-02 18:21:45,912 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 39 states have (on average 4.794871794871795) internal successors, (187), 41 states have internal predecessors, (187), 20 states have call successors, (63), 10 states have call predecessors, (63), 24 states have return successors, (64), 25 states have call predecessors, (64), 19 states have call successors, (64) Word has length 138 [2023-12-02 18:21:45,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:21:45,984 INFO L225 Difference]: With dead ends: 15886 [2023-12-02 18:21:45,984 INFO L226 Difference]: Without dead ends: 13267 [2023-12-02 18:21:46,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28526 ImplicationChecksByTransitivity, 359.8s TimeCoverageRelationStatistics Valid=5663, Invalid=64827, Unknown=0, NotChecked=0, Total=70490 [2023-12-02 18:21:46,033 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 12317 mSDsluCounter, 7631 mSDsCounter, 0 mSdLazyCounter, 46041 mSolverCounterSat, 5430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12364 SdHoareTripleChecker+Valid, 7929 SdHoareTripleChecker+Invalid, 51471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 5430 IncrementalHoareTripleChecker+Valid, 46041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:21:46,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12364 Valid, 7929 Invalid, 51471 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [5430 Valid, 46041 Invalid, 0 Unknown, 0 Unchecked, 23.4s Time] [2023-12-02 18:21:46,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13267 states. [2023-12-02 18:21:47,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13267 to 11712. [2023-12-02 18:21:47,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11712 states, 8269 states have (on average 1.5537549885113073) internal successors, (12848), 8627 states have internal predecessors, (12848), 2702 states have call successors, (2702), 640 states have call predecessors, (2702), 740 states have return successors, (3105), 2599 states have call predecessors, (3105), 2697 states have call successors, (3105) [2023-12-02 18:21:47,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11712 states to 11712 states and 18655 transitions. [2023-12-02 18:21:47,104 INFO L78 Accepts]: Start accepts. Automaton has 11712 states and 18655 transitions. Word has length 138 [2023-12-02 18:21:47,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:21:47,104 INFO L495 AbstractCegarLoop]: Abstraction has 11712 states and 18655 transitions. [2023-12-02 18:21:47,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 39 states have (on average 4.794871794871795) internal successors, (187), 41 states have internal predecessors, (187), 20 states have call successors, (63), 10 states have call predecessors, (63), 24 states have return successors, (64), 25 states have call predecessors, (64), 19 states have call successors, (64) [2023-12-02 18:21:47,105 INFO L276 IsEmpty]: Start isEmpty. Operand 11712 states and 18655 transitions. [2023-12-02 18:21:47,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-12-02 18:21:47,133 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:21:47,134 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:21:47,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 18:21:47,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 18:21:47,334 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:21:47,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:21:47,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1831974666, now seen corresponding path program 1 times [2023-12-02 18:21:47,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:21:47,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175123684] [2023-12-02 18:21:47,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:21:47,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:21:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:21:47,507 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2023-12-02 18:21:47,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:21:47,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175123684] [2023-12-02 18:21:47,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175123684] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:21:47,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:21:47,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:21:47,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22425903] [2023-12-02 18:21:47,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:21:47,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:21:47,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:21:47,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:21:47,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:21:47,509 INFO L87 Difference]: Start difference. First operand 11712 states and 18655 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-12-02 18:21:48,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:21:48,367 INFO L93 Difference]: Finished difference Result 21879 states and 35264 transitions. [2023-12-02 18:21:48,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:21:48,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 169 [2023-12-02 18:21:48,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:21:48,428 INFO L225 Difference]: With dead ends: 21879 [2023-12-02 18:21:48,428 INFO L226 Difference]: Without dead ends: 12197 [2023-12-02 18:21:48,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:21:48,482 INFO L413 NwaCegarLoop]: 600 mSDtfsCounter, 30 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:21:48,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1779 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:21:48,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12197 states. [2023-12-02 18:21:49,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12197 to 11770. [2023-12-02 18:21:49,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11770 states, 8327 states have (on average 1.54989792242104) internal successors, (12906), 8685 states have internal predecessors, (12906), 2702 states have call successors, (2702), 640 states have call predecessors, (2702), 740 states have return successors, (3105), 2599 states have call predecessors, (3105), 2697 states have call successors, (3105) [2023-12-02 18:21:49,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11770 states to 11770 states and 18713 transitions. [2023-12-02 18:21:49,526 INFO L78 Accepts]: Start accepts. Automaton has 11770 states and 18713 transitions. Word has length 169 [2023-12-02 18:21:49,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:21:49,526 INFO L495 AbstractCegarLoop]: Abstraction has 11770 states and 18713 transitions. [2023-12-02 18:21:49,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-12-02 18:21:49,527 INFO L276 IsEmpty]: Start isEmpty. Operand 11770 states and 18713 transitions. [2023-12-02 18:21:49,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-12-02 18:21:49,543 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:21:49,543 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:21:49,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 18:21:49,543 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:21:49,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:21:49,544 INFO L85 PathProgramCache]: Analyzing trace with hash 436358585, now seen corresponding path program 1 times [2023-12-02 18:21:49,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:21:49,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558126202] [2023-12-02 18:21:49,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:21:49,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:21:49,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:21:49,820 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-12-02 18:21:49,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:21:49,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558126202] [2023-12-02 18:21:49,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558126202] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:21:49,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779532633] [2023-12-02 18:21:49,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:21:49,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:21:49,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:21:49,822 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:21:49,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c4ce04-bc12-4397-82bb-40ff4c1dc6c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 18:21:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:21:50,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 2671 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 18:21:50,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:21:50,460 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-12-02 18:21:50,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:21:50,719 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-12-02 18:21:50,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779532633] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:21:50,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2139968477] [2023-12-02 18:21:50,723 INFO L159 IcfgInterpreter]: Started Sifa with 103 locations of interest [2023-12-02 18:21:50,724 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:21:50,724 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:21:50,724 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:21:50,724 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs