./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/deep-nested.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-simple/deep-nested.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f4fa4f6a03e1cc5362361e8e2a443a39504511936859bef102e6d3337f038be8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:18:19,155 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:18:19,290 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 22:18:19,301 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:18:19,301 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:18:19,353 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:18:19,354 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:18:19,355 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:18:19,356 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:18:19,364 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:18:19,365 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:18:19,366 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:18:19,367 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:18:19,368 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:18:19,369 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:18:19,369 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:18:19,370 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:18:19,370 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:18:19,371 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:18:19,371 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:18:19,372 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:18:19,372 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:18:19,373 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:18:19,373 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:18:19,374 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:18:19,374 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:18:19,375 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:18:19,375 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:18:19,375 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:18:19,376 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:18:19,376 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:18:19,377 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:18:19,377 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:18:19,377 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:18:19,378 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:18:19,378 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:18:19,378 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:18:19,378 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:18:19,379 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:18:19,379 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:18:19,379 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:18:19,380 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:18:19,380 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4fa4f6a03e1cc5362361e8e2a443a39504511936859bef102e6d3337f038be8 [2023-11-21 22:18:19,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:18:19,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:18:19,756 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:18:19,758 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:18:19,758 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:18:19,760 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/loop-simple/deep-nested.c [2023-11-21 22:18:23,119 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:18:23,347 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:18:23,349 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/sv-benchmarks/c/loop-simple/deep-nested.c [2023-11-21 22:18:23,359 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/data/eb0f1c2e0/7150693c1d5847ee8c60b6f696d08aa0/FLAGeaf2e40b4 [2023-11-21 22:18:23,375 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/data/eb0f1c2e0/7150693c1d5847ee8c60b6f696d08aa0 [2023-11-21 22:18:23,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:18:23,380 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:18:23,382 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:18:23,382 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:18:23,389 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:18:23,390 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:18:23" (1/1) ... [2023-11-21 22:18:23,391 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6decda6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:23, skipping insertion in model container [2023-11-21 22:18:23,391 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:18:23" (1/1) ... [2023-11-21 22:18:23,414 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:18:23,627 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_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/sv-benchmarks/c/loop-simple/deep-nested.c[863,876] [2023-11-21 22:18:23,637 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:18:23,649 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:18:23,666 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_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/sv-benchmarks/c/loop-simple/deep-nested.c[863,876] [2023-11-21 22:18:23,668 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:18:23,684 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:18:23,685 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:23 WrapperNode [2023-11-21 22:18:23,685 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:18:23,686 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:18:23,686 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:18:23,687 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:18:23,696 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:23" (1/1) ... [2023-11-21 22:18:23,706 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:23" (1/1) ... [2023-11-21 22:18:23,734 INFO L138 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2023-11-21 22:18:23,734 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:18:23,735 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:18:23,736 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:18:23,736 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:18:23,747 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:23" (1/1) ... [2023-11-21 22:18:23,748 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:23" (1/1) ... [2023-11-21 22:18:23,749 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:23" (1/1) ... [2023-11-21 22:18:23,760 INFO L187 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-21 22:18:23,760 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:23" (1/1) ... [2023-11-21 22:18:23,760 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:23" (1/1) ... [2023-11-21 22:18:23,764 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:23" (1/1) ... [2023-11-21 22:18:23,769 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:23" (1/1) ... [2023-11-21 22:18:23,770 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:23" (1/1) ... [2023-11-21 22:18:23,771 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:23" (1/1) ... [2023-11-21 22:18:23,774 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:18:23,775 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:18:23,775 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:18:23,776 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:18:23,777 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:23" (1/1) ... [2023-11-21 22:18:23,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:18:23,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:23,815 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:18:23,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:18:23,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:18:23,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:18:23,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:18:23,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:18:23,958 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:18:23,960 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:18:24,153 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:18:24,246 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:18:24,246 INFO L308 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-21 22:18:24,248 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:18:24 BoogieIcfgContainer [2023-11-21 22:18:24,248 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:18:24,252 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:18:24,252 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:18:24,256 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:18:24,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:18:23" (1/3) ... [2023-11-21 22:18:24,258 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@477215fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:18:24, skipping insertion in model container [2023-11-21 22:18:24,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:23" (2/3) ... [2023-11-21 22:18:24,258 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@477215fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:18:24, skipping insertion in model container [2023-11-21 22:18:24,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:18:24" (3/3) ... [2023-11-21 22:18:24,260 INFO L112 eAbstractionObserver]: Analyzing ICFG deep-nested.c [2023-11-21 22:18:24,285 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:18:24,286 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 22:18:24,341 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:18:24,349 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=PETRI_NET, 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;@1cca4c8d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:18:24,349 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 22:18:24,355 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:24,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 22:18:24,362 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:24,363 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:24,364 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:24,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:24,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1672362000, now seen corresponding path program 1 times [2023-11-21 22:18:24,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:24,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502070015] [2023-11-21 22:18:24,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:24,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:25,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:18:25,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:25,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502070015] [2023-11-21 22:18:25,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502070015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:25,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:18:25,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:18:25,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97707292] [2023-11-21 22:18:25,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:25,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:18:25,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:25,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:18:25,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:18:25,108 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:25,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:25,215 INFO L93 Difference]: Finished difference Result 24 states and 36 transitions. [2023-11-21 22:18:25,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:18:25,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-21 22:18:25,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:25,228 INFO L225 Difference]: With dead ends: 24 [2023-11-21 22:18:25,229 INFO L226 Difference]: Without dead ends: 13 [2023-11-21 22:18:25,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:18:25,237 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 14 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:25,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:18:25,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-21 22:18:25,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2023-11-21 22:18:25,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:25,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2023-11-21 22:18:25,283 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 8 [2023-11-21 22:18:25,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:25,284 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2023-11-21 22:18:25,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:25,284 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2023-11-21 22:18:25,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-21 22:18:25,285 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:25,285 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:25,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:18:25,286 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:25,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:25,287 INFO L85 PathProgramCache]: Analyzing trace with hash 288176442, now seen corresponding path program 1 times [2023-11-21 22:18:25,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:25,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513380821] [2023-11-21 22:18:25,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:25,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:25,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:25,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:18:25,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:25,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513380821] [2023-11-21 22:18:25,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513380821] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:25,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:18:25,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:18:25,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029963210] [2023-11-21 22:18:25,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:25,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:18:25,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:25,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:18:25,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:18:25,897 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:25,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:25,976 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2023-11-21 22:18:25,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:18:25,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-21 22:18:25,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:25,979 INFO L225 Difference]: With dead ends: 23 [2023-11-21 22:18:25,979 INFO L226 Difference]: Without dead ends: 21 [2023-11-21 22:18:25,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:18:25,984 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:25,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 5 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:18:25,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-21 22:18:25,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2023-11-21 22:18:25,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:25,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2023-11-21 22:18:25,996 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2023-11-21 22:18:25,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:25,997 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2023-11-21 22:18:25,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:25,997 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2023-11-21 22:18:25,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-21 22:18:25,999 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:25,999 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:25,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:18:26,000 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:26,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:26,003 INFO L85 PathProgramCache]: Analyzing trace with hash 426812611, now seen corresponding path program 1 times [2023-11-21 22:18:26,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:26,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662884868] [2023-11-21 22:18:26,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:26,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:26,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:18:26,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:26,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662884868] [2023-11-21 22:18:26,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662884868] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:26,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586327477] [2023-11-21 22:18:26,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:26,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:26,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:26,422 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:26,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:18:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:26,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 22:18:26,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:26,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:18:26,608 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:18:26,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586327477] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:26,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:18:26,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-21 22:18:26,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992557402] [2023-11-21 22:18:26,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:26,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:18:26,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:26,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:18:26,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:18:26,621 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:26,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:26,768 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2023-11-21 22:18:26,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:18:26,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-21 22:18:26,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:26,770 INFO L225 Difference]: With dead ends: 48 [2023-11-21 22:18:26,770 INFO L226 Difference]: Without dead ends: 37 [2023-11-21 22:18:26,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:18:26,772 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 37 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:26,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 6 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:18:26,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-21 22:18:26,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2023-11-21 22:18:26,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:26,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2023-11-21 22:18:26,785 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 13 [2023-11-21 22:18:26,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:26,786 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2023-11-21 22:18:26,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:26,786 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2023-11-21 22:18:26,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 22:18:26,787 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:26,787 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:26,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:27,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:27,003 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:27,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:27,004 INFO L85 PathProgramCache]: Analyzing trace with hash -542021410, now seen corresponding path program 1 times [2023-11-21 22:18:27,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:27,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249530562] [2023-11-21 22:18:27,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:27,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:27,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:27,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:18:27,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:27,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249530562] [2023-11-21 22:18:27,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249530562] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:27,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849899038] [2023-11-21 22:18:27,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:27,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:27,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:27,295 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:27,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:18:27,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:27,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 22:18:27,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:27,412 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 22:18:27,413 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:18:27,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849899038] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:27,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:18:27,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-11-21 22:18:27,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869973437] [2023-11-21 22:18:27,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:27,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:18:27,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:27,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:18:27,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:18:27,424 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:27,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:27,545 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2023-11-21 22:18:27,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:18:27,546 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-21 22:18:27,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:27,550 INFO L225 Difference]: With dead ends: 56 [2023-11-21 22:18:27,550 INFO L226 Difference]: Without dead ends: 37 [2023-11-21 22:18:27,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-21 22:18:27,556 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 68 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:27,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 6 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:18:27,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-21 22:18:27,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2023-11-21 22:18:27,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:27,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2023-11-21 22:18:27,579 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 15 [2023-11-21 22:18:27,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:27,580 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2023-11-21 22:18:27,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:27,580 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2023-11-21 22:18:27,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-21 22:18:27,581 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:27,581 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:27,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:27,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:27,803 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:27,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:27,804 INFO L85 PathProgramCache]: Analyzing trace with hash -113827563, now seen corresponding path program 1 times [2023-11-21 22:18:27,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:27,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413956263] [2023-11-21 22:18:27,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:27,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:27,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:28,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 22:18:28,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:28,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413956263] [2023-11-21 22:18:28,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413956263] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:28,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848519687] [2023-11-21 22:18:28,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:28,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:28,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:28,028 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:28,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:18:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:28,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 22:18:28,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 22:18:28,158 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:18:28,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848519687] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:28,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:18:28,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-11-21 22:18:28,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091149781] [2023-11-21 22:18:28,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:28,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:18:28,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:28,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:18:28,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:18:28,162 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:28,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:28,276 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2023-11-21 22:18:28,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:18:28,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-21 22:18:28,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:28,278 INFO L225 Difference]: With dead ends: 58 [2023-11-21 22:18:28,278 INFO L226 Difference]: Without dead ends: 37 [2023-11-21 22:18:28,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-21 22:18:28,279 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 46 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:28,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 6 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:18:28,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-21 22:18:28,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2023-11-21 22:18:28,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:28,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2023-11-21 22:18:28,294 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 17 [2023-11-21 22:18:28,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:28,295 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2023-11-21 22:18:28,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:28,295 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2023-11-21 22:18:28,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-21 22:18:28,296 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:28,296 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:28,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:28,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:28,512 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:28,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:28,513 INFO L85 PathProgramCache]: Analyzing trace with hash 862953470, now seen corresponding path program 1 times [2023-11-21 22:18:28,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:28,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243162080] [2023-11-21 22:18:28,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:28,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:28,865 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 22:18:28,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:28,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243162080] [2023-11-21 22:18:28,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243162080] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:28,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021853778] [2023-11-21 22:18:28,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:28,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:28,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:28,869 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:28,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:18:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:28,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 22:18:28,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:29,039 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 22:18:29,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:18:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 22:18:29,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021853778] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:18:29,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:18:29,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-11-21 22:18:29,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140472710] [2023-11-21 22:18:29,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:18:29,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-21 22:18:29,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:29,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-21 22:18:29,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-11-21 22:18:29,308 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:31,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:31,251 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2023-11-21 22:18:31,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-21 22:18:31,252 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-21 22:18:31,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:31,253 INFO L225 Difference]: With dead ends: 134 [2023-11-21 22:18:31,253 INFO L226 Difference]: Without dead ends: 90 [2023-11-21 22:18:31,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=440, Invalid=1452, Unknown=0, NotChecked=0, Total=1892 [2023-11-21 22:18:31,255 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 295 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:31,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 5 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:18:31,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-21 22:18:31,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 57. [2023-11-21 22:18:31,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 56 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:31,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 72 transitions. [2023-11-21 22:18:31,299 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 72 transitions. Word has length 22 [2023-11-21 22:18:31,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:31,299 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 72 transitions. [2023-11-21 22:18:31,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:31,300 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 72 transitions. [2023-11-21 22:18:31,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-21 22:18:31,302 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:31,302 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2023-11-21 22:18:31,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:31,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:31,520 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:31,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:31,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1866441539, now seen corresponding path program 2 times [2023-11-21 22:18:31,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:31,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745031461] [2023-11-21 22:18:31,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:31,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:31,994 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-21 22:18:31,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:31,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745031461] [2023-11-21 22:18:31,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745031461] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:31,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200060470] [2023-11-21 22:18:31,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:18:31,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:31,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:32,001 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:32,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 22:18:32,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-21 22:18:32,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:18:32,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 22:18:32,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-21 22:18:32,193 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:18:32,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200060470] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:32,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:18:32,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2023-11-21 22:18:32,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934986543] [2023-11-21 22:18:32,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:32,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:18:32,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:32,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:18:32,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:18:32,197 INFO L87 Difference]: Start difference. First operand 57 states and 72 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:32,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:32,302 INFO L93 Difference]: Finished difference Result 97 states and 121 transitions. [2023-11-21 22:18:32,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:18:32,303 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-21 22:18:32,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:32,306 INFO L225 Difference]: With dead ends: 97 [2023-11-21 22:18:32,306 INFO L226 Difference]: Without dead ends: 95 [2023-11-21 22:18:32,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:18:32,308 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:32,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 4 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:18:32,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-21 22:18:32,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 75. [2023-11-21 22:18:32,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 74 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:32,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2023-11-21 22:18:32,373 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 40 [2023-11-21 22:18:32,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:32,374 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2023-11-21 22:18:32,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:32,374 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2023-11-21 22:18:32,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-21 22:18:32,378 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:32,378 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2023-11-21 22:18:32,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:32,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:32,592 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:32,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:32,593 INFO L85 PathProgramCache]: Analyzing trace with hash 625675347, now seen corresponding path program 3 times [2023-11-21 22:18:32,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:32,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152017937] [2023-11-21 22:18:32,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:32,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 15 proven. 64 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-21 22:18:33,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:33,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152017937] [2023-11-21 22:18:33,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152017937] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:33,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352635543] [2023-11-21 22:18:33,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 22:18:33,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:33,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:33,093 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:33,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 22:18:33,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-21 22:18:33,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:18:33,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:18:33,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-21 22:18:33,309 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:18:33,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352635543] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:33,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:18:33,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2023-11-21 22:18:33,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582784956] [2023-11-21 22:18:33,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:33,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:18:33,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:33,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:18:33,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:18:33,312 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:33,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:33,392 INFO L93 Difference]: Finished difference Result 77 states and 95 transitions. [2023-11-21 22:18:33,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:18:33,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-11-21 22:18:33,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:33,396 INFO L225 Difference]: With dead ends: 77 [2023-11-21 22:18:33,396 INFO L226 Difference]: Without dead ends: 75 [2023-11-21 22:18:33,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:18:33,398 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:33,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:18:33,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-21 22:18:33,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2023-11-21 22:18:33,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.265625) internal successors, (81), 64 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:33,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2023-11-21 22:18:33,448 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 50 [2023-11-21 22:18:33,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:33,449 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2023-11-21 22:18:33,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:33,449 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2023-11-21 22:18:33,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-21 22:18:33,455 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:33,456 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1] [2023-11-21 22:18:33,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:33,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:33,672 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:33,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:33,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1344288942, now seen corresponding path program 4 times [2023-11-21 22:18:33,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:33,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561494544] [2023-11-21 22:18:33,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:33,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:33,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 20 proven. 83 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2023-11-21 22:18:34,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:34,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561494544] [2023-11-21 22:18:34,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561494544] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:34,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822299058] [2023-11-21 22:18:34,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 22:18:34,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:34,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:34,204 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:34,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 22:18:34,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 22:18:34,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:18:34,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-21 22:18:34,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 175 proven. 37 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-21 22:18:34,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:18:34,757 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 151 proven. 61 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-21 22:18:34,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822299058] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:18:34,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:18:34,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2023-11-21 22:18:34,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512242886] [2023-11-21 22:18:34,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:18:34,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-21 22:18:34,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:34,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-21 22:18:34,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2023-11-21 22:18:34,761 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:35,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:35,353 INFO L93 Difference]: Finished difference Result 194 states and 260 transitions. [2023-11-21 22:18:35,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 22:18:35,353 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2023-11-21 22:18:35,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:35,355 INFO L225 Difference]: With dead ends: 194 [2023-11-21 22:18:35,355 INFO L226 Difference]: Without dead ends: 105 [2023-11-21 22:18:35,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2023-11-21 22:18:35,358 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 60 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:35,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 10 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:18:35,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-21 22:18:35,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 95. [2023-11-21 22:18:35,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.1808510638297873) internal successors, (111), 94 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:35,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 111 transitions. [2023-11-21 22:18:35,410 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 111 transitions. Word has length 62 [2023-11-21 22:18:35,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:35,410 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 111 transitions. [2023-11-21 22:18:35,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:35,411 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 111 transitions. [2023-11-21 22:18:35,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-21 22:18:35,413 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:35,413 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1] [2023-11-21 22:18:35,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:35,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:35,637 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:35,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:35,637 INFO L85 PathProgramCache]: Analyzing trace with hash 408684782, now seen corresponding path program 5 times [2023-11-21 22:18:35,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:35,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977510291] [2023-11-21 22:18:35,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:35,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:36,394 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 20 proven. 270 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2023-11-21 22:18:36,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:36,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977510291] [2023-11-21 22:18:36,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977510291] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:36,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135517381] [2023-11-21 22:18:36,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-21 22:18:36,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:36,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:36,397 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:36,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 22:18:36,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-11-21 22:18:36,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:18:36,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 22:18:36,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 324 proven. 22 refuted. 0 times theorem prover too weak. 429 trivial. 0 not checked. [2023-11-21 22:18:36,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:18:37,111 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 324 proven. 22 refuted. 0 times theorem prover too weak. 429 trivial. 0 not checked. [2023-11-21 22:18:37,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135517381] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:18:37,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:18:37,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2023-11-21 22:18:37,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702206875] [2023-11-21 22:18:37,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:18:37,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-21 22:18:37,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:37,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-21 22:18:37,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2023-11-21 22:18:37,114 INFO L87 Difference]: Start difference. First operand 95 states and 111 transitions. Second operand has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:38,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:38,426 INFO L93 Difference]: Finished difference Result 433 states and 528 transitions. [2023-11-21 22:18:38,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-21 22:18:38,426 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2023-11-21 22:18:38,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:38,428 INFO L225 Difference]: With dead ends: 433 [2023-11-21 22:18:38,428 INFO L226 Difference]: Without dead ends: 305 [2023-11-21 22:18:38,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=289, Invalid=1517, Unknown=0, NotChecked=0, Total=1806 [2023-11-21 22:18:38,431 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 116 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:38,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 8 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:18:38,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2023-11-21 22:18:38,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 211. [2023-11-21 22:18:38,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.1095238095238096) internal successors, (233), 210 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:38,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 233 transitions. [2023-11-21 22:18:38,501 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 233 transitions. Word has length 92 [2023-11-21 22:18:38,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:38,501 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 233 transitions. [2023-11-21 22:18:38,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:38,501 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 233 transitions. [2023-11-21 22:18:38,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-11-21 22:18:38,504 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:38,504 INFO L195 NwaCegarLoop]: trace histogram [56, 55, 55, 11, 10, 5, 4, 4, 3, 2, 1, 1, 1, 1] [2023-11-21 22:18:38,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:38,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:38,710 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:38,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:38,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1258847024, now seen corresponding path program 6 times [2023-11-21 22:18:38,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:38,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129364309] [2023-11-21 22:18:38,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:38,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:38,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:40,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5314 backedges. 26 proven. 950 refuted. 0 times theorem prover too weak. 4338 trivial. 0 not checked. [2023-11-21 22:18:40,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:40,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129364309] [2023-11-21 22:18:40,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129364309] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:40,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551312358] [2023-11-21 22:18:40,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-21 22:18:40,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:40,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:40,395 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:40,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-21 22:18:40,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-21 22:18:40,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:18:40,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-21 22:18:40,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 5314 backedges. 2504 proven. 893 refuted. 0 times theorem prover too weak. 1917 trivial. 0 not checked. [2023-11-21 22:18:41,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:18:41,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5314 backedges. 0 proven. 3397 refuted. 0 times theorem prover too weak. 1917 trivial. 0 not checked. [2023-11-21 22:18:41,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551312358] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:18:41,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:18:41,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 4] total 16 [2023-11-21 22:18:41,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839807603] [2023-11-21 22:18:41,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:18:41,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-21 22:18:41,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:41,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-21 22:18:41,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-11-21 22:18:41,765 INFO L87 Difference]: Start difference. First operand 211 states and 233 transitions. Second operand has 17 states, 17 states have (on average 5.705882352941177) internal successors, (97), 16 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:43,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:43,529 INFO L93 Difference]: Finished difference Result 1052 states and 1211 transitions. [2023-11-21 22:18:43,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-21 22:18:43,529 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.705882352941177) internal successors, (97), 16 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 209 [2023-11-21 22:18:43,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:43,537 INFO L225 Difference]: With dead ends: 1052 [2023-11-21 22:18:43,537 INFO L226 Difference]: Without dead ends: 845 [2023-11-21 22:18:43,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=705, Invalid=2265, Unknown=0, NotChecked=0, Total=2970 [2023-11-21 22:18:43,543 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:43,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 11 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:18:43,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2023-11-21 22:18:43,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 426. [2023-11-21 22:18:43,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 1.0870588235294119) internal successors, (462), 425 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:43,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 462 transitions. [2023-11-21 22:18:43,652 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 462 transitions. Word has length 209 [2023-11-21 22:18:43,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:43,653 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 462 transitions. [2023-11-21 22:18:43,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.705882352941177) internal successors, (97), 16 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:43,653 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 462 transitions. [2023-11-21 22:18:43,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2023-11-21 22:18:43,661 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:43,661 INFO L195 NwaCegarLoop]: trace histogram [120, 119, 119, 17, 16, 8, 7, 7, 6, 2, 1, 1, 1, 1] [2023-11-21 22:18:43,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:43,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:43,888 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:43,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:43,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1368281510, now seen corresponding path program 7 times [2023-11-21 22:18:43,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:43,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339590093] [2023-11-21 22:18:43,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:43,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:44,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:47,252 INFO L134 CoverageAnalysis]: Checked inductivity of 23737 backedges. 44 proven. 2781 refuted. 0 times theorem prover too weak. 20912 trivial. 0 not checked. [2023-11-21 22:18:47,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:47,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339590093] [2023-11-21 22:18:47,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339590093] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:47,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159369306] [2023-11-21 22:18:47,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-21 22:18:47,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:47,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:47,255 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:47,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-21 22:18:47,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:47,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-21 22:18:47,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 23737 backedges. 4958 proven. 205 refuted. 0 times theorem prover too weak. 18574 trivial. 0 not checked. [2023-11-21 22:18:47,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:18:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 23737 backedges. 4958 proven. 205 refuted. 0 times theorem prover too weak. 18574 trivial. 0 not checked. [2023-11-21 22:18:48,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159369306] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:18:48,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:18:48,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 27 [2023-11-21 22:18:48,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953103374] [2023-11-21 22:18:48,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:18:48,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-21 22:18:48,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:48,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-21 22:18:48,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2023-11-21 22:18:48,316 INFO L87 Difference]: Start difference. First operand 426 states and 462 transitions. Second operand has 27 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 27 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:54,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:54,387 INFO L93 Difference]: Finished difference Result 2065 states and 2372 transitions. [2023-11-21 22:18:54,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-11-21 22:18:54,388 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 27 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 425 [2023-11-21 22:18:54,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:54,396 INFO L225 Difference]: With dead ends: 2065 [2023-11-21 22:18:54,397 INFO L226 Difference]: Without dead ends: 1643 [2023-11-21 22:18:54,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 932 GetRequests, 836 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2991 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1496, Invalid=8010, Unknown=0, NotChecked=0, Total=9506 [2023-11-21 22:18:54,402 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 435 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:54,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 21 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-21 22:18:54,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2023-11-21 22:18:54,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1500. [2023-11-21 22:18:54,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1499 states have (on average 1.0453635757171447) internal successors, (1567), 1499 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:54,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 1567 transitions. [2023-11-21 22:18:54,852 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 1567 transitions. Word has length 425 [2023-11-21 22:18:54,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:54,853 INFO L495 AbstractCegarLoop]: Abstraction has 1500 states and 1567 transitions. [2023-11-21 22:18:54,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 27 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:18:54,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 1567 transitions. [2023-11-21 22:18:54,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1499 [2023-11-21 22:18:54,928 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:54,929 INFO L195 NwaCegarLoop]: trace histogram [457, 456, 456, 48, 47, 8, 7, 7, 6, 2, 1, 1, 1, 1] [2023-11-21 22:18:54,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:55,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd0fc1c-a4a8-418e-a0e5-f3ce96824b67/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-21 22:18:55,144 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:55,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:55,145 INFO L85 PathProgramCache]: Analyzing trace with hash -89229167, now seen corresponding path program 8 times [2023-11-21 22:18:55,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:55,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005510841] [2023-11-21 22:18:55,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:55,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat