./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext/tree_of_cslls.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff 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_ab1a6101-f1f5-4c3c-8672-75dbd0a07884/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1a6101-f1f5-4c3c-8672-75dbd0a07884/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_ab1a6101-f1f5-4c3c-8672-75dbd0a07884/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1a6101-f1f5-4c3c-8672-75dbd0a07884/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext/tree_of_cslls.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1a6101-f1f5-4c3c-8672-75dbd0a07884/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1a6101-f1f5-4c3c-8672-75dbd0a07884/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e174a1790a7df4dcba920aa7097618d66c8703aa13de1aa6af1a2c5f7cb0971c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:37:37,170 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:37:37,296 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1a6101-f1f5-4c3c-8672-75dbd0a07884/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:37:37,304 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:37:37,305 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:37:37,345 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:37:37,346 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:37:37,347 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:37:37,348 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:37:37,353 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:37:37,355 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:37:37,356 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:37:37,356 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:37:37,358 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:37:37,359 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:37:37,359 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:37:37,360 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:37:37,360 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:37:37,361 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:37:37,361 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:37:37,362 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:37:37,362 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:37:37,363 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:37:37,365 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:37:37,366 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:37:37,366 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:37:37,367 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:37:37,367 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:37:37,368 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:37:37,368 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:37:37,370 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:37:37,370 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:37:37,370 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:37:37,371 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:37:37,371 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:37:37,371 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:37:37,371 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:37:37,372 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:37:37,372 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_ab1a6101-f1f5-4c3c-8672-75dbd0a07884/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1a6101-f1f5-4c3c-8672-75dbd0a07884/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e174a1790a7df4dcba920aa7097618d66c8703aa13de1aa6af1a2c5f7cb0971c [2023-11-19 07:37:37,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:37:37,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:37:37,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:37:37,672 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:37:37,673 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:37:37,675 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1a6101-f1f5-4c3c-8672-75dbd0a07884/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/memsafety-ext/tree_of_cslls.i [2023-11-19 07:37:40,824 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:37:41,119 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:37:41,120 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1a6101-f1f5-4c3c-8672-75dbd0a07884/sv-benchmarks/c/memsafety-ext/tree_of_cslls.i [2023-11-19 07:37:41,138 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1a6101-f1f5-4c3c-8672-75dbd0a07884/bin/uautomizer-verify-uCwYo4JHxu/data/d8185daef/2f9dbc4fc7834ed5a734731745063a82/FLAG8d8f0b6e3 [2023-11-19 07:37:41,154 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1a6101-f1f5-4c3c-8672-75dbd0a07884/bin/uautomizer-verify-uCwYo4JHxu/data/d8185daef/2f9dbc4fc7834ed5a734731745063a82 [2023-11-19 07:37:41,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:37:41,158 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:37:41,160 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:37:41,160 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:37:41,169 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:37:41,169 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:37:41" (1/1) ... [2023-11-19 07:37:41,170 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49d70235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:41, skipping insertion in model container [2023-11-19 07:37:41,170 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:37:41" (1/1) ... [2023-11-19 07:37:41,217 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:37:41,537 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:37:41,551 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:37:41,643 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:37:41,682 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:37:41,682 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:41 WrapperNode [2023-11-19 07:37:41,682 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:37:41,683 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:37:41,683 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:37:41,683 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:37:41,691 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:41" (1/1) ... [2023-11-19 07:37:41,707 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:41" (1/1) ... [2023-11-19 07:37:41,746 INFO L138 Inliner]: procedures = 123, calls = 63, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 223 [2023-11-19 07:37:41,747 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:37:41,748 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:37:41,748 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:37:41,749 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:37:41,764 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:41" (1/1) ... [2023-11-19 07:37:41,764 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:41" (1/1) ... [2023-11-19 07:37:41,770 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:41" (1/1) ... [2023-11-19 07:37:41,770 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:41" (1/1) ... [2023-11-19 07:37:41,784 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:41" (1/1) ... [2023-11-19 07:37:41,788 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:41" (1/1) ... [2023-11-19 07:37:41,791 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:41" (1/1) ... [2023-11-19 07:37:41,793 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:41" (1/1) ... [2023-11-19 07:37:41,798 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:37:41,799 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:37:41,799 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:37:41,799 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:37:41,800 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:41" (1/1) ... [2023-11-19 07:37:41,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:37:41,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1a6101-f1f5-4c3c-8672-75dbd0a07884/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:41,840 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1a6101-f1f5-4c3c-8672-75dbd0a07884/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:37:41,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1a6101-f1f5-4c3c-8672-75dbd0a07884/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:37:41,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:37:41,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:37:41,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 07:37:41,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 07:37:41,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:37:41,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:37:41,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:37:41,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:37:42,044 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:37:42,045 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:37:42,782 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:37:42,792 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:37:42,792 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-19 07:37:42,797 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:37:42 BoogieIcfgContainer [2023-11-19 07:37:42,798 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:37:42,801 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:37:42,801 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:37:42,805 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:37:42,805 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:37:41" (1/3) ... [2023-11-19 07:37:42,806 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@654589f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:37:42, skipping insertion in model container [2023-11-19 07:37:42,806 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:41" (2/3) ... [2023-11-19 07:37:42,806 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@654589f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:37:42, skipping insertion in model container [2023-11-19 07:37:42,807 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:37:42" (3/3) ... [2023-11-19 07:37:42,808 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_of_cslls.i [2023-11-19 07:37:42,829 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:37:42,829 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 104 error locations. [2023-11-19 07:37:42,884 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:37:42,895 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@23263324, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:37:42,896 INFO L358 AbstractCegarLoop]: Starting to check reachability of 104 error locations. [2023-11-19 07:37:42,902 INFO L276 IsEmpty]: Start isEmpty. Operand has 211 states, 106 states have (on average 2.207547169811321) internal successors, (234), 210 states have internal predecessors, (234), 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 07:37:42,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-19 07:37:42,909 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:42,911 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-19 07:37:42,912 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:37:42,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:42,920 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2023-11-19 07:37:42,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:42,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52416706] [2023-11-19 07:37:42,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:42,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:43,187 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 07:37:43,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:43,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52416706] [2023-11-19 07:37:43,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52416706] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:43,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:43,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:37:43,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875266029] [2023-11-19 07:37:43,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:43,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:43,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:43,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:43,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:43,231 INFO L87 Difference]: Start difference. First operand has 211 states, 106 states have (on average 2.207547169811321) internal successors, (234), 210 states have internal predecessors, (234), 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 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 07:37:43,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:43,516 INFO L93 Difference]: Finished difference Result 281 states and 304 transitions. [2023-11-19 07:37:43,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:43,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2023-11-19 07:37:43,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:43,532 INFO L225 Difference]: With dead ends: 281 [2023-11-19 07:37:43,532 INFO L226 Difference]: Without dead ends: 279 [2023-11-19 07:37:43,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:43,538 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 199 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:43,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 200 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:37:43,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2023-11-19 07:37:43,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 200. [2023-11-19 07:37:43,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 105 states have (on average 2.057142857142857) internal successors, (216), 199 states have internal predecessors, (216), 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 07:37:43,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 216 transitions. [2023-11-19 07:37:43,587 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 216 transitions. Word has length 3 [2023-11-19 07:37:43,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:43,588 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 216 transitions. [2023-11-19 07:37:43,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 07:37:43,588 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 216 transitions. [2023-11-19 07:37:43,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-19 07:37:43,589 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:43,589 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-19 07:37:43,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:37:43,589 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:37:43,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:43,590 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2023-11-19 07:37:43,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:43,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189935351] [2023-11-19 07:37:43,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:43,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:43,690 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 07:37:43,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:43,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189935351] [2023-11-19 07:37:43,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189935351] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:43,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:43,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:37:43,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227671657] [2023-11-19 07:37:43,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:43,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:43,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:43,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:43,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:43,694 INFO L87 Difference]: Start difference. First operand 200 states and 216 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 07:37:43,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:43,883 INFO L93 Difference]: Finished difference Result 198 states and 214 transitions. [2023-11-19 07:37:43,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:43,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2023-11-19 07:37:43,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:43,889 INFO L225 Difference]: With dead ends: 198 [2023-11-19 07:37:43,889 INFO L226 Difference]: Without dead ends: 198 [2023-11-19 07:37:43,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:43,895 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 2 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:43,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 321 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:37:43,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-11-19 07:37:43,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2023-11-19 07:37:43,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 105 states have (on average 2.038095238095238) internal successors, (214), 197 states have internal predecessors, (214), 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 07:37:43,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 214 transitions. [2023-11-19 07:37:43,924 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 214 transitions. Word has length 3 [2023-11-19 07:37:43,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:43,924 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 214 transitions. [2023-11-19 07:37:43,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 07:37:43,925 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 214 transitions. [2023-11-19 07:37:43,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-19 07:37:43,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:43,926 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:37:43,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:37:43,927 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:37:43,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:43,928 INFO L85 PathProgramCache]: Analyzing trace with hash 889446153, now seen corresponding path program 1 times [2023-11-19 07:37:43,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:43,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288234488] [2023-11-19 07:37:43,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:43,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:44,277 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 07:37:44,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:44,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288234488] [2023-11-19 07:37:44,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288234488] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:44,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:44,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:37:44,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068409716] [2023-11-19 07:37:44,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:44,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:37:44,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:44,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:37:44,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:37:44,285 INFO L87 Difference]: Start difference. First operand 198 states and 214 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 07:37:44,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:44,730 INFO L93 Difference]: Finished difference Result 355 states and 383 transitions. [2023-11-19 07:37:44,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:37:44,731 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2023-11-19 07:37:44,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:44,733 INFO L225 Difference]: With dead ends: 355 [2023-11-19 07:37:44,734 INFO L226 Difference]: Without dead ends: 355 [2023-11-19 07:37:44,734 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 [2023-11-19 07:37:44,735 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 280 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:44,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 233 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:37:44,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2023-11-19 07:37:44,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 191. [2023-11-19 07:37:44,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 105 states have (on average 1.9714285714285715) internal successors, (207), 190 states have internal predecessors, (207), 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 07:37:44,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 207 transitions. [2023-11-19 07:37:44,755 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 207 transitions. Word has length 6 [2023-11-19 07:37:44,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:44,755 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 207 transitions. [2023-11-19 07:37:44,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 07:37:44,756 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 207 transitions. [2023-11-19 07:37:44,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 07:37:44,756 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:44,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:44,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:37:44,757 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:37:44,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:44,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1113924364, now seen corresponding path program 1 times [2023-11-19 07:37:44,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:44,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799246894] [2023-11-19 07:37:44,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:44,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:44,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:44,927 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 07:37:44,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:44,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799246894] [2023-11-19 07:37:44,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799246894] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:44,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:44,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:37:44,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926995536] [2023-11-19 07:37:44,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:44,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:37:44,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:44,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:37:44,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:37:44,930 INFO L87 Difference]: Start difference. First operand 191 states and 207 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:45,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:45,192 INFO L93 Difference]: Finished difference Result 190 states and 206 transitions. [2023-11-19 07:37:45,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:37:45,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-19 07:37:45,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:45,194 INFO L225 Difference]: With dead ends: 190 [2023-11-19 07:37:45,195 INFO L226 Difference]: Without dead ends: 190 [2023-11-19 07:37:45,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:37:45,207 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 6 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:45,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 512 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:37:45,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-11-19 07:37:45,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2023-11-19 07:37:45,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 189 states have internal predecessors, (206), 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 07:37:45,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 206 transitions. [2023-11-19 07:37:45,217 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 206 transitions. Word has length 10 [2023-11-19 07:37:45,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:45,217 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 206 transitions. [2023-11-19 07:37:45,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:45,218 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 206 transitions. [2023-11-19 07:37:45,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 07:37:45,228 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:45,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:45,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:37:45,229 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:37:45,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:45,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1113924365, now seen corresponding path program 1 times [2023-11-19 07:37:45,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:45,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867317258] [2023-11-19 07:37:45,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:45,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:45,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:45,457 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 07:37:45,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:45,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867317258] [2023-11-19 07:37:45,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867317258] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:45,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:45,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:37:45,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281426762] [2023-11-19 07:37:45,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:45,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:37:45,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:45,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:37:45,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:37:45,461 INFO L87 Difference]: Start difference. First operand 190 states and 206 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:45,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:45,731 INFO L93 Difference]: Finished difference Result 189 states and 205 transitions. [2023-11-19 07:37:45,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:37:45,732 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-19 07:37:45,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:45,733 INFO L225 Difference]: With dead ends: 189 [2023-11-19 07:37:45,733 INFO L226 Difference]: Without dead ends: 189 [2023-11-19 07:37:45,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:37:45,734 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 4 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:45,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 533 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:37:45,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-11-19 07:37:45,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2023-11-19 07:37:45,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 105 states have (on average 1.9523809523809523) internal successors, (205), 188 states have internal predecessors, (205), 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 07:37:45,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 205 transitions. [2023-11-19 07:37:45,749 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 205 transitions. Word has length 10 [2023-11-19 07:37:45,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:45,749 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 205 transitions. [2023-11-19 07:37:45,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:45,750 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 205 transitions. [2023-11-19 07:37:45,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 07:37:45,750 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:45,751 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:45,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:37:45,751 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:37:45,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:45,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1114596085, now seen corresponding path program 1 times [2023-11-19 07:37:45,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:45,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889063999] [2023-11-19 07:37:45,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:45,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:46,151 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 07:37:46,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:46,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889063999] [2023-11-19 07:37:46,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889063999] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:46,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:46,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 07:37:46,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923339953] [2023-11-19 07:37:46,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:46,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:37:46,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:46,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:37:46,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:37:46,154 INFO L87 Difference]: Start difference. First operand 189 states and 205 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 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 07:37:46,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:46,787 INFO L93 Difference]: Finished difference Result 354 states and 390 transitions. [2023-11-19 07:37:46,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:37:46,788 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 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 07:37:46,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:46,790 INFO L225 Difference]: With dead ends: 354 [2023-11-19 07:37:46,791 INFO L226 Difference]: Without dead ends: 354 [2023-11-19 07:37:46,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:37:46,792 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 385 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:46,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 801 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:37:46,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2023-11-19 07:37:46,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 193. [2023-11-19 07:37:46,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 109 states have (on average 1.9357798165137614) internal successors, (211), 192 states have internal predecessors, (211), 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 07:37:46,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 211 transitions. [2023-11-19 07:37:46,802 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 211 transitions. Word has length 15 [2023-11-19 07:37:46,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:46,803 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 211 transitions. [2023-11-19 07:37:46,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 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 07:37:46,804 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 211 transitions. [2023-11-19 07:37:46,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 07:37:46,809 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:46,809 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:46,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:37:46,810 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:37:46,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:46,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1114596086, now seen corresponding path program 1 times [2023-11-19 07:37:46,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:46,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130167810] [2023-11-19 07:37:46,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:46,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:46,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:47,207 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 07:37:47,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:47,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130167810] [2023-11-19 07:37:47,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130167810] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:47,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:47,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 07:37:47,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853474631] [2023-11-19 07:37:47,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:47,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:37:47,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:47,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:37:47,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:37:47,210 INFO L87 Difference]: Start difference. First operand 193 states and 211 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 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 07:37:47,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:47,913 INFO L93 Difference]: Finished difference Result 348 states and 384 transitions. [2023-11-19 07:37:47,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:37:47,913 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 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 07:37:47,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:47,916 INFO L225 Difference]: With dead ends: 348 [2023-11-19 07:37:47,916 INFO L226 Difference]: Without dead ends: 348 [2023-11-19 07:37:47,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:37:47,917 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 455 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:47,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 546 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 07:37:47,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-11-19 07:37:47,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 193. [2023-11-19 07:37:47,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 109 states have (on average 1.926605504587156) internal successors, (210), 192 states have internal predecessors, (210), 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 07:37:47,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 210 transitions. [2023-11-19 07:37:47,924 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 210 transitions. Word has length 15 [2023-11-19 07:37:47,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:47,924 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 210 transitions. [2023-11-19 07:37:47,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 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 07:37:47,924 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 210 transitions. [2023-11-19 07:37:47,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 07:37:47,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:47,925 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:47,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:37:47,926 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:37:47,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:47,926 INFO L85 PathProgramCache]: Analyzing trace with hash 192740277, now seen corresponding path program 1 times [2023-11-19 07:37:47,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:47,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979632657] [2023-11-19 07:37:47,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:47,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:47,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:47,985 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 07:37:47,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:47,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979632657] [2023-11-19 07:37:47,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979632657] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:47,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:47,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:37:47,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429837309] [2023-11-19 07:37:47,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:47,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:47,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:47,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:47,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:47,988 INFO L87 Difference]: Start difference. First operand 193 states and 210 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 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 07:37:48,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:48,191 INFO L93 Difference]: Finished difference Result 318 states and 350 transitions. [2023-11-19 07:37:48,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:48,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-19 07:37:48,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:48,194 INFO L225 Difference]: With dead ends: 318 [2023-11-19 07:37:48,194 INFO L226 Difference]: Without dead ends: 318 [2023-11-19 07:37:48,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:48,195 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 169 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:48,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 351 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:37:48,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2023-11-19 07:37:48,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 190. [2023-11-19 07:37:48,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 109 states have (on average 1.8990825688073394) internal successors, (207), 189 states have internal predecessors, (207), 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 07:37:48,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 207 transitions. [2023-11-19 07:37:48,201 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 207 transitions. Word has length 16 [2023-11-19 07:37:48,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:48,202 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 207 transitions. [2023-11-19 07:37:48,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 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 07:37:48,202 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 207 transitions. [2023-11-19 07:37:48,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 07:37:48,202 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:48,203 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:48,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:37:48,203 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:37:48,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:48,204 INFO L85 PathProgramCache]: Analyzing trace with hash 192740278, now seen corresponding path program 1 times [2023-11-19 07:37:48,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:48,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237592171] [2023-11-19 07:37:48,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:48,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:48,318 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 07:37:48,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:48,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237592171] [2023-11-19 07:37:48,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237592171] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:48,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:48,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:37:48,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600081148] [2023-11-19 07:37:48,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:48,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:48,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:48,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:48,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:48,322 INFO L87 Difference]: Start difference. First operand 190 states and 207 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 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 07:37:48,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:48,509 INFO L93 Difference]: Finished difference Result 295 states and 327 transitions. [2023-11-19 07:37:48,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:48,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-19 07:37:48,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:48,512 INFO L225 Difference]: With dead ends: 295 [2023-11-19 07:37:48,512 INFO L226 Difference]: Without dead ends: 295 [2023-11-19 07:37:48,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:48,513 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 140 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:48,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 362 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:37:48,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2023-11-19 07:37:48,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 188. [2023-11-19 07:37:48,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 109 states have (on average 1.8807339449541285) internal successors, (205), 187 states have internal predecessors, (205), 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 07:37:48,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 205 transitions. [2023-11-19 07:37:48,519 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 205 transitions. Word has length 16 [2023-11-19 07:37:48,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:48,520 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 205 transitions. [2023-11-19 07:37:48,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 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 07:37:48,520 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 205 transitions. [2023-11-19 07:37:48,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 07:37:48,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:48,521 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:48,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:37:48,521 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:37:48,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:48,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1678809590, now seen corresponding path program 1 times [2023-11-19 07:37:48,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:48,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023490153] [2023-11-19 07:37:48,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:48,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:48,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:48,569 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 07:37:48,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:48,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023490153] [2023-11-19 07:37:48,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023490153] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:48,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:48,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:37:48,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503028837] [2023-11-19 07:37:48,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:48,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:37:48,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:48,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:37:48,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:37:48,572 INFO L87 Difference]: Start difference. First operand 188 states and 205 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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 07:37:48,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:48,830 INFO L93 Difference]: Finished difference Result 255 states and 279 transitions. [2023-11-19 07:37:48,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:37:48,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-19 07:37:48,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:48,832 INFO L225 Difference]: With dead ends: 255 [2023-11-19 07:37:48,832 INFO L226 Difference]: Without dead ends: 255 [2023-11-19 07:37:48,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:37:48,833 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 329 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:48,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 154 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:37:48,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2023-11-19 07:37:48,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 177. [2023-11-19 07:37:48,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 113 states have (on average 1.752212389380531) internal successors, (198), 176 states have internal predecessors, (198), 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 07:37:48,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 198 transitions. [2023-11-19 07:37:48,841 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 198 transitions. Word has length 17 [2023-11-19 07:37:48,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:48,842 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 198 transitions. [2023-11-19 07:37:48,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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 07:37:48,842 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 198 transitions. [2023-11-19 07:37:48,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 07:37:48,843 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:48,843 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:48,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:37:48,844 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:37:48,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:48,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1678809591, now seen corresponding path program 1 times [2023-11-19 07:37:48,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:48,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284507796] [2023-11-19 07:37:48,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:48,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:48,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:48,983 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 07:37:48,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:48,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284507796] [2023-11-19 07:37:48,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284507796] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:48,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:48,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:37:48,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903842357] [2023-11-19 07:37:48,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:48,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:37:48,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:48,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:37:48,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:37:48,986 INFO L87 Difference]: Start difference. First operand 177 states and 198 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 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 07:37:49,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:49,428 INFO L93 Difference]: Finished difference Result 440 states and 494 transitions. [2023-11-19 07:37:49,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:37:49,429 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-19 07:37:49,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:49,432 INFO L225 Difference]: With dead ends: 440 [2023-11-19 07:37:49,432 INFO L226 Difference]: Without dead ends: 440 [2023-11-19 07:37:49,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:37:49,433 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 545 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:49,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 298 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:37:49,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2023-11-19 07:37:49,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 320. [2023-11-19 07:37:49,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 256 states have (on average 1.75390625) internal successors, (449), 319 states have internal predecessors, (449), 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 07:37:49,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 449 transitions. [2023-11-19 07:37:49,444 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 449 transitions. Word has length 17 [2023-11-19 07:37:49,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:49,445 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 449 transitions. [2023-11-19 07:37:49,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 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 07:37:49,445 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 449 transitions. [2023-11-19 07:37:49,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 07:37:49,446 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:49,446 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:49,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:37:49,447 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:37:49,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:49,447 INFO L85 PathProgramCache]: Analyzing trace with hash -445669701, now seen corresponding path program 1 times [2023-11-19 07:37:49,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:49,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917097342] [2023-11-19 07:37:49,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:49,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:49,628 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 07:37:49,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:49,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917097342] [2023-11-19 07:37:49,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917097342] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:49,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:49,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 07:37:49,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698765061] [2023-11-19 07:37:49,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:49,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:37:49,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:49,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:37:49,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:37:49,631 INFO L87 Difference]: Start difference. First operand 320 states and 449 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 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 07:37:50,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:50,373 INFO L93 Difference]: Finished difference Result 787 states and 1129 transitions. [2023-11-19 07:37:50,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:37:50,374 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 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) Word has length 19 [2023-11-19 07:37:50,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:50,379 INFO L225 Difference]: With dead ends: 787 [2023-11-19 07:37:50,379 INFO L226 Difference]: Without dead ends: 787 [2023-11-19 07:37:50,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:37:50,381 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 372 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 1229 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:50,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 1229 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 07:37:50,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2023-11-19 07:37:50,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 319. [2023-11-19 07:37:50,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 256 states have (on average 1.75) internal successors, (448), 318 states have internal predecessors, (448), 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 07:37:50,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 448 transitions. [2023-11-19 07:37:50,398 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 448 transitions. Word has length 19 [2023-11-19 07:37:50,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:50,398 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 448 transitions. [2023-11-19 07:37:50,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 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 07:37:50,399 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 448 transitions. [2023-11-19 07:37:50,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 07:37:50,401 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:50,401 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:50,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 07:37:50,401 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:37:50,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:50,402 INFO L85 PathProgramCache]: Analyzing trace with hash -445669700, now seen corresponding path program 1 times [2023-11-19 07:37:50,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:50,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667602620] [2023-11-19 07:37:50,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:50,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:50,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:50,835 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 07:37:50,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:50,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667602620] [2023-11-19 07:37:50,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667602620] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:50,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:50,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-19 07:37:50,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258589800] [2023-11-19 07:37:50,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:50,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:37:50,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:50,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:37:50,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:37:50,838 INFO L87 Difference]: Start difference. First operand 319 states and 448 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 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 07:37:51,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:51,708 INFO L93 Difference]: Finished difference Result 605 states and 844 transitions. [2023-11-19 07:37:51,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:37:51,709 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 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) Word has length 19 [2023-11-19 07:37:51,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:51,713 INFO L225 Difference]: With dead ends: 605 [2023-11-19 07:37:51,713 INFO L226 Difference]: Without dead ends: 605 [2023-11-19 07:37:51,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2023-11-19 07:37:51,715 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 392 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:51,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 909 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 07:37:51,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2023-11-19 07:37:51,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 323. [2023-11-19 07:37:51,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 260 states have (on average 1.7384615384615385) internal successors, (452), 322 states have internal predecessors, (452), 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 07:37:51,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 452 transitions. [2023-11-19 07:37:51,727 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 452 transitions. Word has length 19 [2023-11-19 07:37:51,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:51,727 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 452 transitions. [2023-11-19 07:37:51,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 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 07:37:51,728 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 452 transitions. [2023-11-19 07:37:51,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 07:37:51,728 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:51,729 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:51,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 07:37:51,729 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:37:51,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:51,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1571608545, now seen corresponding path program 1 times [2023-11-19 07:37:51,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:51,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381874672] [2023-11-19 07:37:51,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:51,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:51,767 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 07:37:51,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:51,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381874672] [2023-11-19 07:37:51,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381874672] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:51,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:51,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:37:51,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668717298] [2023-11-19 07:37:51,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:51,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:51,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:51,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:51,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:51,770 INFO L87 Difference]: Start difference. First operand 323 states and 452 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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 07:37:51,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:51,793 INFO L93 Difference]: Finished difference Result 397 states and 530 transitions. [2023-11-19 07:37:51,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:51,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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) Word has length 19 [2023-11-19 07:37:51,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:51,796 INFO L225 Difference]: With dead ends: 397 [2023-11-19 07:37:51,797 INFO L226 Difference]: Without dead ends: 397 [2023-11-19 07:37:51,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:51,798 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 164 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:51,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 297 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:37:51,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2023-11-19 07:37:51,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 363. [2023-11-19 07:37:51,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 300 states have (on average 1.7666666666666666) internal successors, (530), 362 states have internal predecessors, (530), 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 07:37:51,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 530 transitions. [2023-11-19 07:37:51,809 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 530 transitions. Word has length 19 [2023-11-19 07:37:51,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:51,809 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 530 transitions. [2023-11-19 07:37:51,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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 07:37:51,810 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 530 transitions. [2023-11-19 07:37:51,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-19 07:37:51,810 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:51,811 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] [2023-11-19 07:37:51,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 07:37:51,811 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:37:51,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:51,812 INFO L85 PathProgramCache]: Analyzing trace with hash 189775598, now seen corresponding path program 1 times [2023-11-19 07:37:51,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:51,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113812092] [2023-11-19 07:37:51,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:51,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:51,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:51,871 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 07:37:51,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:51,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113812092] [2023-11-19 07:37:51,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113812092] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:51,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:51,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:37:51,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866128629] [2023-11-19 07:37:51,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:51,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:51,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:51,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:51,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:51,873 INFO L87 Difference]: Start difference. First operand 363 states and 530 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:51,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:51,885 INFO L93 Difference]: Finished difference Result 367 states and 534 transitions. [2023-11-19 07:37:51,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:51,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-19 07:37:51,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:51,888 INFO L225 Difference]: With dead ends: 367 [2023-11-19 07:37:51,889 INFO L226 Difference]: Without dead ends: 367 [2023-11-19 07:37:51,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:51,890 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 0 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:51,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 360 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:37:51,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-11-19 07:37:51,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2023-11-19 07:37:51,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 304 states have (on average 1.756578947368421) internal successors, (534), 366 states have internal predecessors, (534), 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 07:37:51,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 534 transitions. [2023-11-19 07:37:51,900 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 534 transitions. Word has length 23 [2023-11-19 07:37:51,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:51,901 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 534 transitions. [2023-11-19 07:37:51,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:51,901 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 534 transitions. [2023-11-19 07:37:51,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-19 07:37:51,902 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:51,902 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:51,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-19 07:37:51,903 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:37:51,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:51,903 INFO L85 PathProgramCache]: Analyzing trace with hash 97933121, now seen corresponding path program 1 times [2023-11-19 07:37:51,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:51,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521136581] [2023-11-19 07:37:51,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:51,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:51,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:52,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:52,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:52,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521136581] [2023-11-19 07:37:52,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521136581] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:52,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491733677] [2023-11-19 07:37:52,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:52,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:52,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1a6101-f1f5-4c3c-8672-75dbd0a07884/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:52,366 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1a6101-f1f5-4c3c-8672-75dbd0a07884/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:52,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1a6101-f1f5-4c3c-8672-75dbd0a07884/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:37:52,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:52,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-19 07:37:52,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:52,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-11-19 07:37:52,660 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 07:37:52,661 INFO L378 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 11 treesize of output 11 [2023-11-19 07:37:52,687 INFO L378 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 19 treesize of output 1 [2023-11-19 07:37:52,764 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-19 07:37:52,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2023-11-19 07:37:52,800 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 07:37:52,800 INFO L378 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 11 treesize of output 11 [2023-11-19 07:37:52,844 INFO L378 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 30 treesize of output 23 [2023-11-19 07:37:52,903 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-19 07:37:52,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2023-11-19 07:37:52,939 INFO L349 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2023-11-19 07:37:52,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 18 treesize of output 20 [2023-11-19 07:37:52,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 31 treesize of output 13 [2023-11-19 07:37:52,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:52,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:53,205 INFO L349 Elim1Store]: treesize reduction 27, result has 68.2 percent of original size [2023-11-19 07:37:53,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 69 [2023-11-19 07:37:53,221 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_461 (Array Int Int)) (v_ArrVal_460 (Array Int Int))) (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~tmpList~0#1.base| v_ArrVal_460)) (.cse3 (+ |c_ULTIMATE.start_main_~tree~0#1.offset| 8))) (let ((.cse0 (select (select .cse2 |c_ULTIMATE.start_main_~tree~0#1.base|) .cse3))) (let ((.cse1 (select (select (store .cse2 .cse0 v_ArrVal_461) |c_ULTIMATE.start_main_~tree~0#1.base|) .cse3))) (or (= .cse0 .cse1) (= |c_ULTIMATE.start_main_#t~mem9#1.base| .cse1)))))) is different from false [2023-11-19 07:37:53,238 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_461 (Array Int Int)) (v_ArrVal_460 (Array Int Int))) (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~tmpList~0#1.base| v_ArrVal_460)) (.cse2 (+ |c_ULTIMATE.start_main_~tree~0#1.offset| 8))) (let ((.cse0 (select (select .cse3 |c_ULTIMATE.start_main_~tree~0#1.base|) .cse2))) (let ((.cse1 (select (select (store .cse3 .cse0 v_ArrVal_461) |c_ULTIMATE.start_main_~tree~0#1.base|) .cse2))) (or (= .cse0 .cse1) (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~tree~0#1.base|) .cse2) .cse1)))))) is different from false [2023-11-19 07:37:53,546 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:37:53,547 INFO L378 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 92 [2023-11-19 07:37:53,552 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:37:53,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 571 treesize of output 445 [2023-11-19 07:37:53,578 INFO L378 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 20 treesize of output 12 [2023-11-19 07:37:53,581 INFO L378 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 7 treesize of output 3 [2023-11-19 07:37:53,590 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-19 07:37:53,591 INFO L378 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 13 treesize of output 12 [2023-11-19 07:37:53,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-19 07:37:53,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491733677] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:53,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:37:53,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 13] total 23 [2023-11-19 07:37:53,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635929855] [2023-11-19 07:37:53,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:53,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-19 07:37:53,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:53,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-19 07:37:53,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=375, Unknown=10, NotChecked=82, Total=552 [2023-11-19 07:37:53,630 INFO L87 Difference]: Start difference. First operand 367 states and 534 transitions. Second operand has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 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 07:37:55,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:55,388 INFO L93 Difference]: Finished difference Result 703 states and 999 transitions. [2023-11-19 07:37:55,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:37:55,389 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 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 24 [2023-11-19 07:37:55,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:55,393 INFO L225 Difference]: With dead ends: 703 [2023-11-19 07:37:55,393 INFO L226 Difference]: Without dead ends: 703 [2023-11-19 07:37:55,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=173, Invalid=637, Unknown=10, NotChecked=110, Total=930 [2023-11-19 07:37:55,394 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 386 mSDsluCounter, 2284 mSDsCounter, 0 mSdLazyCounter, 1699 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 2481 SdHoareTripleChecker+Invalid, 2430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 707 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:55,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 2481 Invalid, 2430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1699 Invalid, 0 Unknown, 707 Unchecked, 1.5s Time] [2023-11-19 07:37:55,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2023-11-19 07:37:55,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 366. [2023-11-19 07:37:55,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 304 states have (on average 1.7532894736842106) internal successors, (533), 365 states have internal predecessors, (533), 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 07:37:55,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 533 transitions. [2023-11-19 07:37:55,407 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 533 transitions. Word has length 24 [2023-11-19 07:37:55,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:55,408 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 533 transitions. [2023-11-19 07:37:55,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 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 07:37:55,408 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 533 transitions. [2023-11-19 07:37:55,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-19 07:37:55,409 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:55,409 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:55,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1a6101-f1f5-4c3c-8672-75dbd0a07884/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:55,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1a6101-f1f5-4c3c-8672-75dbd0a07884/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-19 07:37:55,629 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:37:55,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:55,630 INFO L85 PathProgramCache]: Analyzing trace with hash 97933122, now seen corresponding path program 1 times [2023-11-19 07:37:55,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:55,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112090395] [2023-11-19 07:37:55,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:55,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:55,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:56,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:56,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:56,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112090395] [2023-11-19 07:37:56,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112090395] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:56,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923477394] [2023-11-19 07:37:56,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:56,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:56,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1a6101-f1f5-4c3c-8672-75dbd0a07884/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:56,416 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1a6101-f1f5-4c3c-8672-75dbd0a07884/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:56,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1a6101-f1f5-4c3c-8672-75dbd0a07884/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:37:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:56,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-19 07:37:56,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:56,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-11-19 07:37:56,630 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 07:37:56,631 INFO L378 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 11 treesize of output 11 [2023-11-19 07:37:56,666 INFO L378 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 19 treesize of output 1 [2023-11-19 07:37:56,669 INFO L378 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 13 treesize of output 9 [2023-11-19 07:37:56,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:37:56,795 INFO L378 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 36 [2023-11-19 07:37:56,801 INFO L378 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 30 treesize of output 13 [2023-11-19 07:37:56,852 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 07:37:56,852 INFO L378 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 11 treesize of output 11 [2023-11-19 07:37:56,956 INFO L378 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 18 treesize of output 13 [2023-11-19 07:37:56,967 INFO L378 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 14 [2023-11-19 07:37:57,080 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-19 07:37:57,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 88 [2023-11-19 07:37:57,098 INFO L378 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 43 treesize of output 13 [2023-11-19 07:37:57,193 INFO L349 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2023-11-19 07:37:57,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 17 treesize of output 17 [2023-11-19 07:37:57,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-19 07:37:57,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 44 treesize of output 20 [2023-11-19 07:37:57,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2023-11-19 07:37:57,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:57,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:57,500 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:37:57,501 INFO L378 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 118 treesize of output 122 [2023-11-19 07:37:57,529 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:37:57,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 124 [2023-11-19 07:37:59,064 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:37:59,065 INFO L378 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 355 treesize of output 306 [2023-11-19 07:37:59,183 INFO L349 Elim1Store]: treesize reduction 38, result has 61.6 percent of original size [2023-11-19 07:37:59,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 297 treesize of output 232 [2023-11-19 07:37:59,297 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:37:59,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 58696 treesize of output 53615 [2023-11-19 07:37:59,585 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-19 07:37:59,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 1737 treesize of output 1639 [2023-11-19 07:37:59,699 INFO L378 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 971 treesize of output 919 [2023-11-19 07:37:59,764 INFO L378 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 951 treesize of output 863 [2023-11-19 07:37:59,814 INFO L378 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 933 treesize of output 813 [2023-11-19 07:37:59,956 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:37:59,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 780 treesize of output 798 [2023-11-19 07:38:00,077 INFO L378 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 795 treesize of output 711 [2023-11-19 07:38:00,124 INFO L378 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 689 treesize of output 685 [2023-11-19 07:38:00,170 INFO L378 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 685 treesize of output 677 [2023-11-19 07:38:00,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 930 treesize of output 870 [2023-11-19 07:38:00,279 INFO L378 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 685 treesize of output 677 [2023-11-19 07:38:00,334 INFO L378 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 677 treesize of output 669 [2023-11-19 07:38:11,807 INFO L378 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 8 treesize of output 4 [2023-11-19 07:38:14,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:14,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923477394] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:38:14,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:38:14,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 32 [2023-11-19 07:38:14,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394315290] [2023-11-19 07:38:14,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:38:14,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-19 07:38:14,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:14,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-19 07:38:14,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=909, Unknown=10, NotChecked=0, Total=1056 [2023-11-19 07:38:14,345 INFO L87 Difference]: Start difference. First operand 366 states and 533 transitions. Second operand has 33 states, 32 states have (on average 2.15625) internal successors, (69), 33 states have internal predecessors, (69), 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 07:38:27,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:27,247 INFO L93 Difference]: Finished difference Result 701 states and 997 transitions. [2023-11-19 07:38:27,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:38:27,249 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.15625) internal successors, (69), 33 states have internal predecessors, (69), 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 24 [2023-11-19 07:38:27,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:27,253 INFO L225 Difference]: With dead ends: 701 [2023-11-19 07:38:27,254 INFO L226 Difference]: Without dead ends: 701 [2023-11-19 07:38:27,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=338, Invalid=1458, Unknown=10, NotChecked=0, Total=1806 [2023-11-19 07:38:27,255 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 677 mSDsluCounter, 2320 mSDsCounter, 0 mSdLazyCounter, 2595 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 2485 SdHoareTripleChecker+Invalid, 2631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:27,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [677 Valid, 2485 Invalid, 2631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2595 Invalid, 0 Unknown, 0 Unchecked, 11.4s Time] [2023-11-19 07:38:27,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2023-11-19 07:38:27,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 356. [2023-11-19 07:38:27,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 296 states have (on average 1.7635135135135136) internal successors, (522), 355 states have internal predecessors, (522), 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 07:38:27,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 522 transitions. [2023-11-19 07:38:27,269 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 522 transitions. Word has length 24 [2023-11-19 07:38:27,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:27,269 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 522 transitions. [2023-11-19 07:38:27,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.15625) internal successors, (69), 33 states have internal predecessors, (69), 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 07:38:27,270 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 522 transitions. [2023-11-19 07:38:27,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-19 07:38:27,270 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:27,270 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] [2023-11-19 07:38:27,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1a6101-f1f5-4c3c-8672-75dbd0a07884/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:27,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab1a6101-f1f5-4c3c-8672-75dbd0a07884/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-19 07:38:27,480 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:38:27,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:27,480 INFO L85 PathProgramCache]: Analyzing trace with hash -354718400, now seen corresponding path program 1 times [2023-11-19 07:38:27,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:27,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910351300] [2023-11-19 07:38:27,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:27,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:27,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:27,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:27,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910351300] [2023-11-19 07:38:27,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910351300] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:27,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:27,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:38:27,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788840740] [2023-11-19 07:38:27,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:27,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:38:27,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:27,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:38:27,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:38:27,564 INFO L87 Difference]: Start difference. First operand 356 states and 522 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 07:38:27,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:27,603 INFO L93 Difference]: Finished difference Result 359 states and 525 transitions. [2023-11-19 07:38:27,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:38:27,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 24 [2023-11-19 07:38:27,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:27,606 INFO L225 Difference]: With dead ends: 359 [2023-11-19 07:38:27,606 INFO L226 Difference]: Without dead ends: 359 [2023-11-19 07:38:27,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:38:27,607 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 0 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:27,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 354 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:38:27,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2023-11-19 07:38:27,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2023-11-19 07:38:27,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 299 states have (on average 1.7558528428093645) internal successors, (525), 358 states have internal predecessors, (525), 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 07:38:27,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 525 transitions. [2023-11-19 07:38:27,617 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 525 transitions. Word has length 24 [2023-11-19 07:38:27,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:27,618 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 525 transitions. [2023-11-19 07:38:27,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 07:38:27,619 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 525 transitions. [2023-11-19 07:38:27,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-19 07:38:27,619 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:27,619 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] [2023-11-19 07:38:27,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-19 07:38:27,621 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:38:27,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:27,622 INFO L85 PathProgramCache]: Analyzing trace with hash 2035634985, now seen corresponding path program 1 times [2023-11-19 07:38:27,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:27,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574856240] [2023-11-19 07:38:27,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:27,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:27,699 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 07:38:27,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:27,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574856240] [2023-11-19 07:38:27,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574856240] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:27,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:27,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:38:27,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258409916] [2023-11-19 07:38:27,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:27,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:38:27,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:27,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:38:27,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:38:27,701 INFO L87 Difference]: Start difference. First operand 359 states and 525 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 07:38:27,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:27,779 INFO L93 Difference]: Finished difference Result 398 states and 550 transitions. [2023-11-19 07:38:27,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:38:27,781 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 25 [2023-11-19 07:38:27,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:27,783 INFO L225 Difference]: With dead ends: 398 [2023-11-19 07:38:27,784 INFO L226 Difference]: Without dead ends: 398 [2023-11-19 07:38:27,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:38:27,785 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 48 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:27,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 349 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:38:27,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2023-11-19 07:38:27,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 348. [2023-11-19 07:38:27,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 288 states have (on average 1.7395833333333333) internal successors, (501), 347 states have internal predecessors, (501), 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 07:38:27,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 501 transitions. [2023-11-19 07:38:27,796 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 501 transitions. Word has length 25 [2023-11-19 07:38:27,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:27,797 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 501 transitions. [2023-11-19 07:38:27,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 07:38:27,797 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 501 transitions. [2023-11-19 07:38:27,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-19 07:38:27,798 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:27,798 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] [2023-11-19 07:38:27,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-19 07:38:27,798 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 07:38:27,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:27,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1464484731, now seen corresponding path program 1 times [2023-11-19 07:38:27,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:27,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080513623] [2023-11-19 07:38:27,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:27,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:27,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat