./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/vnew1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/vnew1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu --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 92c9725cc4c9709a9ab81826fb3481ef81541ab6f68244b6727f50e97bc0f0c0 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:37:30,815 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:37:30,881 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:37:30,887 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:37:30,888 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:37:30,912 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:37:30,913 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:37:30,914 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:37:30,915 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:37:30,916 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:37:30,917 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:37:30,917 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:37:30,918 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:37:30,919 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:37:30,920 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:37:30,920 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:37:30,921 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:37:30,922 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:37:30,922 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:37:30,923 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:37:30,923 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:37:30,924 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:37:30,925 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:37:30,926 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:37:30,926 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:37:30,927 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:37:30,927 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:37:30,928 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:37:30,928 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:37:30,929 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:37:30,930 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:37:30,930 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:37:30,931 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:37:30,932 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:37:30,932 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:37:30,933 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:37:30,933 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:37:30,934 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:37:30,935 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:37:30,935 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_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 92c9725cc4c9709a9ab81826fb3481ef81541ab6f68244b6727f50e97bc0f0c0 [2023-11-19 07:37:31,193 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:37:31,215 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:37:31,218 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:37:31,220 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:37:31,221 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:37:31,222 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/loops-crafted-1/vnew1.c [2023-11-19 07:37:34,308 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:37:34,532 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:37:34,532 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/sv-benchmarks/c/loops-crafted-1/vnew1.c [2023-11-19 07:37:34,541 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/data/bb4aea0ec/1c799612b8d64598aedda87207cd7ab9/FLAGc061dc0c6 [2023-11-19 07:37:34,557 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/data/bb4aea0ec/1c799612b8d64598aedda87207cd7ab9 [2023-11-19 07:37:34,560 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:37:34,561 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:37:34,563 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:37:34,563 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:37:34,569 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:37:34,570 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:37:34" (1/1) ... [2023-11-19 07:37:34,572 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14afe637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:34, skipping insertion in model container [2023-11-19 07:37:34,573 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:37:34" (1/1) ... [2023-11-19 07:37:34,595 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:37:34,787 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_40265a47-3907-4cd8-9893-42d0fd5663d6/sv-benchmarks/c/loops-crafted-1/vnew1.c[403,416] [2023-11-19 07:37:34,809 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:37:34,821 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:37:34,838 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_40265a47-3907-4cd8-9893-42d0fd5663d6/sv-benchmarks/c/loops-crafted-1/vnew1.c[403,416] [2023-11-19 07:37:34,848 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:37:34,870 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:37:34,871 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:34 WrapperNode [2023-11-19 07:37:34,871 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:37:34,873 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:37:34,873 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:37:34,873 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:37:34,883 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:34" (1/1) ... [2023-11-19 07:37:34,892 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:34" (1/1) ... [2023-11-19 07:37:34,917 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 57 [2023-11-19 07:37:34,918 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:37:34,919 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:37:34,919 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:37:34,919 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:37:34,929 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:34" (1/1) ... [2023-11-19 07:37:34,930 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:34" (1/1) ... [2023-11-19 07:37:34,940 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:34" (1/1) ... [2023-11-19 07:37:34,941 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:34" (1/1) ... [2023-11-19 07:37:34,947 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:34" (1/1) ... [2023-11-19 07:37:34,950 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:34" (1/1) ... [2023-11-19 07:37:34,951 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:34" (1/1) ... [2023-11-19 07:37:34,952 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:34" (1/1) ... [2023-11-19 07:37:34,954 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:37:34,956 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:37:34,956 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:37:34,956 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:37:34,957 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:34" (1/1) ... [2023-11-19 07:37:34,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:37:34,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:34,994 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:37:35,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:37:35,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:37:35,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:37:35,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:37:35,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:37:35,137 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:37:35,140 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:37:35,369 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:37:35,381 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:37:35,382 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:37:35,386 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:37:35 BoogieIcfgContainer [2023-11-19 07:37:35,386 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:37:35,391 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:37:35,392 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:37:35,395 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:37:35,397 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:37:34" (1/3) ... [2023-11-19 07:37:35,398 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b63e74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:37:35, skipping insertion in model container [2023-11-19 07:37:35,398 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:34" (2/3) ... [2023-11-19 07:37:35,400 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b63e74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:37:35, skipping insertion in model container [2023-11-19 07:37:35,400 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:37:35" (3/3) ... [2023-11-19 07:37:35,402 INFO L112 eAbstractionObserver]: Analyzing ICFG vnew1.c [2023-11-19 07:37:35,422 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:37:35,422 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:37:35,491 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:37:35,501 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;@1dd389ef, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:37:35,502 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:37:35,506 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 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) [2023-11-19 07:37:35,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 07:37:35,520 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:35,520 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:35,521 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:35,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:35,529 INFO L85 PathProgramCache]: Analyzing trace with hash 185205049, now seen corresponding path program 1 times [2023-11-19 07:37:35,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:35,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374319754] [2023-11-19 07:37:35,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:35,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:35,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:35,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:35,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374319754] [2023-11-19 07:37:35,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374319754] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:35,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:35,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:37:35,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219031728] [2023-11-19 07:37:35,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:35,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:37:35,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:35,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:37:35,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:37:35,835 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 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 4.0) internal successors, (8), 2 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) [2023-11-19 07:37:35,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:35,852 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2023-11-19 07:37:35,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:37:35,854 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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 [2023-11-19 07:37:35,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:35,862 INFO L225 Difference]: With dead ends: 24 [2023-11-19 07:37:35,863 INFO L226 Difference]: Without dead ends: 10 [2023-11-19 07:37:35,866 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 [2023-11-19 07:37:35,873 INFO L413 NwaCegarLoop]: 16 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, 16 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 [2023-11-19 07:37:35,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:37:35,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-11-19 07:37:35,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-11-19 07:37:35,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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) [2023-11-19 07:37:35,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2023-11-19 07:37:35,907 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2023-11-19 07:37:35,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:35,908 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2023-11-19 07:37:35,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2023-11-19 07:37:35,908 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2023-11-19 07:37:35,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 07:37:35,909 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:35,910 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:35,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:37:35,911 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:35,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:35,911 INFO L85 PathProgramCache]: Analyzing trace with hash 181510965, now seen corresponding path program 1 times [2023-11-19 07:37:35,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:35,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961789642] [2023-11-19 07:37:35,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:35,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:36,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:36,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:36,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:36,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961789642] [2023-11-19 07:37:36,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961789642] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:36,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:36,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:37:36,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13001678] [2023-11-19 07:37:36,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:36,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:37:36,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:36,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:37:36,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:37:36,568 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 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) [2023-11-19 07:37:36,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:36,727 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2023-11-19 07:37:36,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:37:36,729 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 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 [2023-11-19 07:37:36,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:36,731 INFO L225 Difference]: With dead ends: 17 [2023-11-19 07:37:36,731 INFO L226 Difference]: Without dead ends: 15 [2023-11-19 07:37:36,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:37:36,740 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:36,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 14 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:37:36,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-19 07:37:36,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2023-11-19 07:37:36,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 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) [2023-11-19 07:37:36,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2023-11-19 07:37:36,759 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2023-11-19 07:37:36,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:36,759 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2023-11-19 07:37:36,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 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) [2023-11-19 07:37:36,760 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2023-11-19 07:37:36,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 07:37:36,761 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:36,761 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:36,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:37:36,762 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:36,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:36,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1383318765, now seen corresponding path program 1 times [2023-11-19 07:37:36,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:36,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188293893] [2023-11-19 07:37:36,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:36,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:36,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:37,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:37,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:37,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188293893] [2023-11-19 07:37:37,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188293893] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:37,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914782186] [2023-11-19 07:37:37,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:37,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:37,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:37,272 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:37,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:37:37,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:37,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:37:37,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:37,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:37,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:37,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914782186] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:37,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:37:37,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-11-19 07:37:37,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873602010] [2023-11-19 07:37:37,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:37,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:37:37,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:37,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:37:37,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:37:37,853 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 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) [2023-11-19 07:37:38,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:38,303 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2023-11-19 07:37:38,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:37:38,304 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 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 9 [2023-11-19 07:37:38,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:38,306 INFO L225 Difference]: With dead ends: 35 [2023-11-19 07:37:38,307 INFO L226 Difference]: Without dead ends: 33 [2023-11-19 07:37:38,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2023-11-19 07:37:38,309 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 40 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:38,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 46 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:37:38,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-19 07:37:38,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2023-11-19 07:37:38,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 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) [2023-11-19 07:37:38,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2023-11-19 07:37:38,320 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 9 [2023-11-19 07:37:38,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:38,321 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2023-11-19 07:37:38,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 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) [2023-11-19 07:37:38,321 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2023-11-19 07:37:38,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 07:37:38,322 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:38,322 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:38,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:38,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:38,537 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:38,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:38,537 INFO L85 PathProgramCache]: Analyzing trace with hash -215461579, now seen corresponding path program 2 times [2023-11-19 07:37:38,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:38,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453494468] [2023-11-19 07:37:38,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:38,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:38,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:38,966 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:38,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:38,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453494468] [2023-11-19 07:37:38,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453494468] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:38,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219586403] [2023-11-19 07:37:38,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:37:38,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:38,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:38,973 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:39,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:37:39,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:37:39,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:37:39,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 07:37:39,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:39,296 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:39,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:39,580 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:39,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219586403] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:39,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:37:39,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-11-19 07:37:39,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611126008] [2023-11-19 07:37:39,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:39,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:37:39,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:39,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:37:39,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:37:39,584 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 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) [2023-11-19 07:37:41,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:41,937 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2023-11-19 07:37:41,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-19 07:37:41,938 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 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) Word has length 12 [2023-11-19 07:37:41,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:41,940 INFO L225 Difference]: With dead ends: 80 [2023-11-19 07:37:41,940 INFO L226 Difference]: Without dead ends: 78 [2023-11-19 07:37:41,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=530, Invalid=1822, Unknown=0, NotChecked=0, Total=2352 [2023-11-19 07:37:41,943 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 218 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:41,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 104 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:37:41,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-19 07:37:41,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 32. [2023-11-19 07:37:41,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 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) [2023-11-19 07:37:41,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2023-11-19 07:37:41,965 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 12 [2023-11-19 07:37:41,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:41,966 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2023-11-19 07:37:41,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 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) [2023-11-19 07:37:41,966 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2023-11-19 07:37:41,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 07:37:41,967 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:41,967 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:41,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:42,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-19 07:37:42,173 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:42,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:42,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1204539281, now seen corresponding path program 1 times [2023-11-19 07:37:42,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:42,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532798179] [2023-11-19 07:37:42,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:42,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:42,689 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:42,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:42,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532798179] [2023-11-19 07:37:42,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532798179] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:42,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397652701] [2023-11-19 07:37:42,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:42,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:42,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:42,691 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:42,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:37:42,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:42,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-19 07:37:42,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:42,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:43,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397652701] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:43,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:37:43,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-11-19 07:37:43,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70463705] [2023-11-19 07:37:43,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:43,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:37:43,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:43,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:37:43,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:37:43,189 INFO L87 Difference]: Start difference. First operand 32 states and 44 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 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) [2023-11-19 07:37:45,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:45,228 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2023-11-19 07:37:45,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-19 07:37:45,228 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 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 14 [2023-11-19 07:37:45,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:45,230 INFO L225 Difference]: With dead ends: 87 [2023-11-19 07:37:45,230 INFO L226 Difference]: Without dead ends: 85 [2023-11-19 07:37:45,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=534, Invalid=2016, Unknown=0, NotChecked=0, Total=2550 [2023-11-19 07:37:45,236 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 166 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:45,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 98 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:37:45,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-19 07:37:45,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 36. [2023-11-19 07:37:45,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 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) [2023-11-19 07:37:45,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2023-11-19 07:37:45,281 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 14 [2023-11-19 07:37:45,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:45,282 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2023-11-19 07:37:45,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 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) [2023-11-19 07:37:45,282 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2023-11-19 07:37:45,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 07:37:45,284 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:45,284 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:45,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:45,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:45,513 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:45,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:45,513 INFO L85 PathProgramCache]: Analyzing trace with hash 655979117, now seen corresponding path program 2 times [2023-11-19 07:37:45,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:45,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399431290] [2023-11-19 07:37:45,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:45,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:46,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:46,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:46,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399431290] [2023-11-19 07:37:46,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399431290] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:46,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230101027] [2023-11-19 07:37:46,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:37:46,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:46,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:46,174 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:46,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:37:46,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:37:46,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:37:46,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:37:46,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:46,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:46,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:46,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:46,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230101027] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:46,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:37:46,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2023-11-19 07:37:46,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889912686] [2023-11-19 07:37:46,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:46,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 07:37:46,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:46,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 07:37:46,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2023-11-19 07:37:46,905 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 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) [2023-11-19 07:37:48,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:48,301 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2023-11-19 07:37:48,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-19 07:37:48,305 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 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 15 [2023-11-19 07:37:48,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:48,306 INFO L225 Difference]: With dead ends: 63 [2023-11-19 07:37:48,309 INFO L226 Difference]: Without dead ends: 36 [2023-11-19 07:37:48,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=356, Invalid=1624, Unknown=0, NotChecked=0, Total=1980 [2023-11-19 07:37:48,312 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 69 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:48,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 81 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:37:48,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-19 07:37:48,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-19 07:37:48,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 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) [2023-11-19 07:37:48,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2023-11-19 07:37:48,353 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 15 [2023-11-19 07:37:48,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:48,354 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2023-11-19 07:37:48,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 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) [2023-11-19 07:37:48,354 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2023-11-19 07:37:48,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 07:37:48,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:48,355 INFO L195 NwaCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:48,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:48,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:48,576 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:48,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:48,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1813512815, now seen corresponding path program 3 times [2023-11-19 07:37:48,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:48,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30372958] [2023-11-19 07:37:48,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:48,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:50,046 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:50,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:50,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30372958] [2023-11-19 07:37:50,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30372958] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:50,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51285470] [2023-11-19 07:37:50,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:37:50,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:50,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:50,053 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:50,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40265a47-3907-4cd8-9893-42d0fd5663d6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:37:50,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-19 07:37:50,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:37:50,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-19 07:37:50,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:50,788 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:50,788 INFO L327 TraceCheckSpWp]: Computing backward predicates...