./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/sina5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/sina5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl --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 503513a726b63dcf7252b591818901fbaab844b1443a8550e123aa98a06238f6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:16:19,409 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:16:19,534 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:16:19,543 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:16:19,544 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:16:19,581 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:16:19,583 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:16:19,583 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:16:19,585 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:16:19,590 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:16:19,591 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:16:19,592 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:16:19,592 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:16:19,594 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:16:19,595 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:16:19,595 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:16:19,595 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:16:19,596 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:16:19,596 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:16:19,597 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:16:19,597 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:16:19,598 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:16:19,598 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:16:19,598 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:16:19,599 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:16:19,600 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:16:19,600 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:16:19,600 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:16:19,601 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:16:19,601 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:16:19,602 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:16:19,603 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:16:19,603 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:16:19,603 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:16:19,603 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:16:19,604 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:16:19,604 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:16:19,604 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:16:19,604 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:16:19,604 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_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 503513a726b63dcf7252b591818901fbaab844b1443a8550e123aa98a06238f6 [2023-11-12 02:16:19,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:16:19,936 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:16:19,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:16:19,940 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:16:19,940 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:16:19,942 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/array-fpi/sina5.c [2023-11-12 02:16:23,040 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:16:23,309 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:16:23,309 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/sv-benchmarks/c/array-fpi/sina5.c [2023-11-12 02:16:23,318 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/data/6922a0108/11de047a238a4ea9bdaca1127fed312e/FLAG2313daf69 [2023-11-12 02:16:23,336 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/data/6922a0108/11de047a238a4ea9bdaca1127fed312e [2023-11-12 02:16:23,342 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:16:23,345 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:16:23,347 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:16:23,348 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:16:23,353 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:16:23,354 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:16:23" (1/1) ... [2023-11-12 02:16:23,355 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@701802d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:23, skipping insertion in model container [2023-11-12 02:16:23,355 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:16:23" (1/1) ... [2023-11-12 02:16:23,381 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:16:23,551 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_9304e5ec-545a-40ce-ab89-69fbebd62e7c/sv-benchmarks/c/array-fpi/sina5.c[588,601] [2023-11-12 02:16:23,581 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:16:23,591 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:16:23,605 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_9304e5ec-545a-40ce-ab89-69fbebd62e7c/sv-benchmarks/c/array-fpi/sina5.c[588,601] [2023-11-12 02:16:23,615 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:16:23,631 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:16:23,631 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:23 WrapperNode [2023-11-12 02:16:23,632 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:16:23,633 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:16:23,633 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:16:23,633 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:16:23,641 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:23" (1/1) ... [2023-11-12 02:16:23,650 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:23" (1/1) ... [2023-11-12 02:16:23,687 INFO L138 Inliner]: procedures = 17, calls = 35, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 117 [2023-11-12 02:16:23,688 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:16:23,689 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:16:23,689 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:16:23,689 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:16:23,699 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:23" (1/1) ... [2023-11-12 02:16:23,699 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:23" (1/1) ... [2023-11-12 02:16:23,702 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:23" (1/1) ... [2023-11-12 02:16:23,702 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:23" (1/1) ... [2023-11-12 02:16:23,709 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:23" (1/1) ... [2023-11-12 02:16:23,713 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:23" (1/1) ... [2023-11-12 02:16:23,715 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:23" (1/1) ... [2023-11-12 02:16:23,716 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:23" (1/1) ... [2023-11-12 02:16:23,718 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:16:23,719 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:16:23,720 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:16:23,720 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:16:23,721 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:23" (1/1) ... [2023-11-12 02:16:23,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:16:23,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:23,756 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:16:23,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:16:23,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:16:23,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:16:23,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:16:23,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:16:23,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:16:23,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:16:23,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:16:23,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:16:23,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:16:23,873 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:16:23,875 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:16:24,108 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:16:24,114 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:16:24,114 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-12 02:16:24,117 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:16:24 BoogieIcfgContainer [2023-11-12 02:16:24,117 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:16:24,120 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:16:24,120 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:16:24,123 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:16:24,124 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:16:23" (1/3) ... [2023-11-12 02:16:24,125 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48f6ec7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:16:24, skipping insertion in model container [2023-11-12 02:16:24,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:16:23" (2/3) ... [2023-11-12 02:16:24,125 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48f6ec7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:16:24, skipping insertion in model container [2023-11-12 02:16:24,126 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:16:24" (3/3) ... [2023-11-12 02:16:24,127 INFO L112 eAbstractionObserver]: Analyzing ICFG sina5.c [2023-11-12 02:16:24,153 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:16:24,153 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:16:24,195 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:16:24,202 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;@3279493c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:16:24,203 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:16:24,209 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 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) [2023-11-12 02:16:24,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 02:16:24,217 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:16:24,219 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:24,222 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:16:24,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:24,229 INFO L85 PathProgramCache]: Analyzing trace with hash -635308358, now seen corresponding path program 1 times [2023-11-12 02:16:24,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:24,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134806333] [2023-11-12 02:16:24,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:24,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:24,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:24,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134806333] [2023-11-12 02:16:24,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134806333] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:24,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:24,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:16:24,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837774914] [2023-11-12 02:16:24,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:24,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:16:24,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:24,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:16:24,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:16:24,451 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 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 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2023-11-12 02:16:24,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:16:24,469 INFO L93 Difference]: Finished difference Result 56 states and 82 transitions. [2023-11-12 02:16:24,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:16:24,472 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 18 [2023-11-12 02:16:24,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:16:24,480 INFO L225 Difference]: With dead ends: 56 [2023-11-12 02:16:24,480 INFO L226 Difference]: Without dead ends: 26 [2023-11-12 02:16:24,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:16:24,487 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:16:24,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:16:24,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-12 02:16:24,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-12 02:16:24,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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) [2023-11-12 02:16:24,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-11-12 02:16:24,523 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 18 [2023-11-12 02:16:24,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:16:24,523 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-11-12 02:16:24,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2023-11-12 02:16:24,524 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-11-12 02:16:24,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 02:16:24,525 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:16:24,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:24,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:16:24,526 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:16:24,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:24,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1344199344, now seen corresponding path program 1 times [2023-11-12 02:16:24,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:24,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265253643] [2023-11-12 02:16:24,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:24,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:24,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:24,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:24,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265253643] [2023-11-12 02:16:24,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265253643] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:24,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:24,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:16:24,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435738400] [2023-11-12 02:16:24,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:24,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:16:24,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:24,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:16:24,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:16:24,778 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2023-11-12 02:16:24,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:16:24,868 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2023-11-12 02:16:24,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:16:24,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 18 [2023-11-12 02:16:24,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:16:24,870 INFO L225 Difference]: With dead ends: 61 [2023-11-12 02:16:24,870 INFO L226 Difference]: Without dead ends: 42 [2023-11-12 02:16:24,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:16:24,872 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 52 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:16:24,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 18 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:16:24,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-12 02:16:24,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2023-11-12 02:16:24,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 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) [2023-11-12 02:16:24,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-11-12 02:16:24,882 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 18 [2023-11-12 02:16:24,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:16:24,883 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-11-12 02:16:24,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2023-11-12 02:16:24,883 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-11-12 02:16:24,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-12 02:16:24,887 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:16:24,887 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:24,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:16:24,888 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:16:24,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:24,890 INFO L85 PathProgramCache]: Analyzing trace with hash -933126362, now seen corresponding path program 1 times [2023-11-12 02:16:24,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:24,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906686770] [2023-11-12 02:16:24,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:24,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:27,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:27,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:27,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906686770] [2023-11-12 02:16:27,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906686770] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:27,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898602999] [2023-11-12 02:16:27,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:27,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:27,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:27,807 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:27,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:16:27,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:27,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-12 02:16:27,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:28,210 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 02:16:28,231 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-12 02:16:28,232 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-11-12 02:16:28,363 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-12 02:16:28,647 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-11-12 02:16:28,916 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-11-12 02:16:29,152 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-11-12 02:16:29,481 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-11-12 02:16:29,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:29,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:30,853 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:16:30,854 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:16:30,855 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:16:30,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:30,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898602999] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:30,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:30,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2023-11-12 02:16:30,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901661916] [2023-11-12 02:16:30,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:30,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-12 02:16:30,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:30,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-12 02:16:30,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1697, Unknown=0, NotChecked=0, Total=1980 [2023-11-12 02:16:30,917 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 45 states have internal predecessors, (76), 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) [2023-11-12 02:16:33,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:16:33,005 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2023-11-12 02:16:33,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-12 02:16:33,006 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 45 states have internal predecessors, (76), 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 28 [2023-11-12 02:16:33,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:16:33,007 INFO L225 Difference]: With dead ends: 75 [2023-11-12 02:16:33,007 INFO L226 Difference]: Without dead ends: 73 [2023-11-12 02:16:33,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=433, Invalid=2647, Unknown=0, NotChecked=0, Total=3080 [2023-11-12 02:16:33,011 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 159 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:16:33,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 176 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 02:16:33,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-12 02:16:33,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2023-11-12 02:16:33,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 53 states have internal predecessors, (65), 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) [2023-11-12 02:16:33,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2023-11-12 02:16:33,030 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 28 [2023-11-12 02:16:33,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:16:33,031 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2023-11-12 02:16:33,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 45 states have internal predecessors, (76), 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) [2023-11-12 02:16:33,031 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2023-11-12 02:16:33,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-12 02:16:33,033 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:16:33,033 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:33,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:33,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:33,239 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:16:33,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:33,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1642466588, now seen corresponding path program 2 times [2023-11-12 02:16:33,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:33,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775362864] [2023-11-12 02:16:33,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:33,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:33,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:16:33,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:33,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775362864] [2023-11-12 02:16:33,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775362864] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:33,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548412128] [2023-11-12 02:16:33,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:16:33,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:33,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:33,363 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:33,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:16:33,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:16:33,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:16:33,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:16:33,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:16:33,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:16:33,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548412128] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:33,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:33,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-12 02:16:33,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793132604] [2023-11-12 02:16:33,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:33,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:16:33,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:33,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:16:33,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:16:33,576 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 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) [2023-11-12 02:16:33,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:16:33,819 INFO L93 Difference]: Finished difference Result 136 states and 161 transitions. [2023-11-12 02:16:33,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:16:33,820 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 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 30 [2023-11-12 02:16:33,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:16:33,821 INFO L225 Difference]: With dead ends: 136 [2023-11-12 02:16:33,821 INFO L226 Difference]: Without dead ends: 78 [2023-11-12 02:16:33,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:16:33,823 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 60 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:16:33,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 59 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:16:33,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-12 02:16:33,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 56. [2023-11-12 02:16:33,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 55 states have internal predecessors, (65), 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) [2023-11-12 02:16:33,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2023-11-12 02:16:33,839 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 30 [2023-11-12 02:16:33,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:16:33,840 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2023-11-12 02:16:33,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 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) [2023-11-12 02:16:33,840 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2023-11-12 02:16:33,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-12 02:16:33,841 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:16:33,842 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:33,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:34,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:34,048 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:16:34,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:34,049 INFO L85 PathProgramCache]: Analyzing trace with hash -396360796, now seen corresponding path program 3 times [2023-11-12 02:16:34,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:34,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337069571] [2023-11-12 02:16:34,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:34,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:34,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:16:34,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:34,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337069571] [2023-11-12 02:16:34,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337069571] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:34,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275726548] [2023-11-12 02:16:34,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:16:34,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:34,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:34,197 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:34,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:16:34,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 02:16:34,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:16:34,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:16:34,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:34,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:16:34,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:34,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:16:34,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275726548] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:34,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:34,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-12 02:16:34,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895143661] [2023-11-12 02:16:34,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:34,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:16:34,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:34,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:16:34,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:16:34,446 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 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) [2023-11-12 02:16:34,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:16:34,615 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2023-11-12 02:16:34,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:16:34,616 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 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 30 [2023-11-12 02:16:34,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:16:34,617 INFO L225 Difference]: With dead ends: 74 [2023-11-12 02:16:34,617 INFO L226 Difference]: Without dead ends: 57 [2023-11-12 02:16:34,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:16:34,619 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 91 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:16:34,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 46 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:16:34,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-12 02:16:34,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2023-11-12 02:16:34,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 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) [2023-11-12 02:16:34,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2023-11-12 02:16:34,631 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 30 [2023-11-12 02:16:34,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:16:34,631 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2023-11-12 02:16:34,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 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) [2023-11-12 02:16:34,631 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2023-11-12 02:16:34,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-12 02:16:34,633 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:16:34,633 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:34,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:34,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:34,840 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:16:34,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:34,841 INFO L85 PathProgramCache]: Analyzing trace with hash 389318684, now seen corresponding path program 4 times [2023-11-12 02:16:34,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:34,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195908815] [2023-11-12 02:16:34,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:34,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:34,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:38,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:38,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195908815] [2023-11-12 02:16:38,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195908815] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:38,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999291307] [2023-11-12 02:16:38,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:16:38,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:38,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:38,486 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:38,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9304e5ec-545a-40ce-ab89-69fbebd62e7c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:16:38,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:16:38,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:16:38,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 86 conjunts are in the unsatisfiable core [2023-11-12 02:16:38,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:38,650 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-12 02:16:38,659 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 02:16:38,737 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-12 02:16:38,901 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-12 02:16:38,901 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-12 02:16:39,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:16:39,379 INFO L322 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-12 02:16:39,379 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 38 [2023-11-12 02:16:39,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:16:39,641 INFO L322 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2023-11-12 02:16:39,642 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-11-12 02:16:40,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:16:40,180 INFO L322 Elim1Store]: treesize reduction 36, result has 25.0 percent of original size [2023-11-12 02:16:40,181 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 47 treesize of output 55 [2023-11-12 02:16:40,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:16:40,501 INFO L322 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-11-12 02:16:40,502 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 51 [2023-11-12 02:16:40,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:16:40,858 INFO L322 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2023-11-12 02:16:40,858 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 47 treesize of output 51 [2023-11-12 02:16:41,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:16:41,150 INFO L322 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2023-11-12 02:16:41,150 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 47 treesize of output 51 [2023-11-12 02:16:41,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:16:41,610 INFO L322 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2023-11-12 02:16:41,610 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 47 treesize of output 55 [2023-11-12 02:16:41,935 INFO L322 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2023-11-12 02:16:41,935 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 59 treesize of output 75 [2023-11-12 02:16:42,502 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:42,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:49,785 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:49,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999291307] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:49,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:49,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 79 [2023-11-12 02:16:49,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213170990] [2023-11-12 02:16:49,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:49,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-11-12 02:16:49,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:49,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-11-12 02:16:49,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=613, Invalid=5549, Unknown=0, NotChecked=0, Total=6162 [2023-11-12 02:16:49,792 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 79 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 79 states have internal predecessors, (103), 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)