./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstpncpy-alloca-2.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe878f-f536-4307-9a4d-7ca0f3f06ce5/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe878f-f536-4307-9a4d-7ca0f3f06ce5/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_0bfe878f-f536-4307-9a4d-7ca0f3f06ce5/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe878f-f536-4307-9a4d-7ca0f3f06ce5/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstpncpy-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe878f-f536-4307-9a4d-7ca0f3f06ce5/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe878f-f536-4307-9a4d-7ca0f3f06ce5/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 64bit --witnessprinter.graph.data.programhash ddb0eb207fb72f46b2f9a0f11e334a77be9b4b455314fd1b26a90347e4178746 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:40:38,451 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:40:38,535 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe878f-f536-4307-9a4d-7ca0f3f06ce5/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2023-11-19 07:40:38,542 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:40:38,543 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:40:38,575 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:40:38,576 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:40:38,577 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:40:38,578 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:40:38,579 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:40:38,580 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:40:38,581 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:40:38,582 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:40:38,583 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:40:38,584 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:40:38,585 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:40:38,586 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:40:38,586 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:40:38,587 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:40:38,588 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:40:38,589 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:40:38,590 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:40:38,591 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:40:38,591 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:40:38,592 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:40:38,593 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:40:38,594 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:40:38,595 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:40:38,595 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:40:38,596 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:40:38,597 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:40:38,598 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:40:38,599 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:40:38,599 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:40:38,600 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:40:38,601 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_0bfe878f-f536-4307-9a4d-7ca0f3f06ce5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe878f-f536-4307-9a4d-7ca0f3f06ce5/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ddb0eb207fb72f46b2f9a0f11e334a77be9b4b455314fd1b26a90347e4178746 [2023-11-19 07:40:38,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:40:39,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:40:39,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:40:39,028 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:40:39,028 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:40:39,030 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe878f-f536-4307-9a4d-7ca0f3f06ce5/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstpncpy-alloca-2.i [2023-11-19 07:40:42,747 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:40:43,134 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:40:43,135 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe878f-f536-4307-9a4d-7ca0f3f06ce5/sv-benchmarks/c/termination-memory-alloca/openbsd_cstpncpy-alloca-2.i [2023-11-19 07:40:43,164 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe878f-f536-4307-9a4d-7ca0f3f06ce5/bin/uautomizer-verify-uCwYo4JHxu/data/cd1043f9f/07e218aec1c9438e9689f2340ba20dd3/FLAGab54c3625 [2023-11-19 07:40:43,181 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe878f-f536-4307-9a4d-7ca0f3f06ce5/bin/uautomizer-verify-uCwYo4JHxu/data/cd1043f9f/07e218aec1c9438e9689f2340ba20dd3 [2023-11-19 07:40:43,184 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:40:43,186 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:40:43,187 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:40:43,188 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:40:43,194 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:40:43,194 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:40:43" (1/1) ... [2023-11-19 07:40:43,196 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1246268f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:43, skipping insertion in model container [2023-11-19 07:40:43,196 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:40:43" (1/1) ... [2023-11-19 07:40:43,256 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:40:43,663 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:40:43,680 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:40:43,755 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:40:43,798 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:40:43,799 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:43 WrapperNode [2023-11-19 07:40:43,799 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:40:43,800 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:40:43,800 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:40:43,800 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:40:43,809 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:43" (1/1) ... [2023-11-19 07:40:43,823 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:43" (1/1) ... [2023-11-19 07:40:43,850 INFO L138 Inliner]: procedures = 113, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 89 [2023-11-19 07:40:43,851 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:40:43,852 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:40:43,852 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:40:43,852 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:40:43,863 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:43" (1/1) ... [2023-11-19 07:40:43,863 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:43" (1/1) ... [2023-11-19 07:40:43,868 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:43" (1/1) ... [2023-11-19 07:40:43,868 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:43" (1/1) ... [2023-11-19 07:40:43,879 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:43" (1/1) ... [2023-11-19 07:40:43,884 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:43" (1/1) ... [2023-11-19 07:40:43,886 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:43" (1/1) ... [2023-11-19 07:40:43,888 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:43" (1/1) ... [2023-11-19 07:40:43,892 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:40:43,893 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:40:43,893 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:40:43,893 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:40:43,894 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:43" (1/1) ... [2023-11-19 07:40:43,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:40:43,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe878f-f536-4307-9a4d-7ca0f3f06ce5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:43,941 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe878f-f536-4307-9a4d-7ca0f3f06ce5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:40:43,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe878f-f536-4307-9a4d-7ca0f3f06ce5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:40:43,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:40:43,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:40:43,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 07:40:43,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:40:43,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 07:40:43,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:40:43,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:40:43,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:40:44,133 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:40:44,137 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:40:44,467 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:40:44,477 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:40:44,477 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:40:44,482 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:40:44 BoogieIcfgContainer [2023-11-19 07:40:44,483 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:40:44,487 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:40:44,487 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:40:44,504 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:40:44,504 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:40:43" (1/3) ... [2023-11-19 07:40:44,505 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11fb96bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:40:44, skipping insertion in model container [2023-11-19 07:40:44,505 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:43" (2/3) ... [2023-11-19 07:40:44,506 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11fb96bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:40:44, skipping insertion in model container [2023-11-19 07:40:44,506 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:40:44" (3/3) ... [2023-11-19 07:40:44,508 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstpncpy-alloca-2.i [2023-11-19 07:40:44,533 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:40:44,533 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2023-11-19 07:40:44,592 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:40:44,601 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;@5d027e28, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:40:44,602 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-11-19 07:40:44,607 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 32 states have (on average 1.90625) internal successors, (61), 53 states have internal predecessors, (61), 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 07:40:44,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-19 07:40:44,615 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:44,616 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:40:44,617 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 07:40:44,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:44,623 INFO L85 PathProgramCache]: Analyzing trace with hash 889510731, now seen corresponding path program 1 times [2023-11-19 07:40:44,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:44,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141409043] [2023-11-19 07:40:44,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:44,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:45,120 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 07:40:45,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:45,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141409043] [2023-11-19 07:40:45,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141409043] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:45,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:45,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:40:45,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513203806] [2023-11-19 07:40:45,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:45,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:40:45,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:45,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:40:45,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:40:45,172 INFO L87 Difference]: Start difference. First operand has 54 states, 32 states have (on average 1.90625) internal successors, (61), 53 states have internal predecessors, (61), 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 3.0) internal successors, (6), 3 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 07:40:45,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:45,258 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2023-11-19 07:40:45,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:40:45,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 07:40:45,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:45,272 INFO L225 Difference]: With dead ends: 53 [2023-11-19 07:40:45,272 INFO L226 Difference]: Without dead ends: 51 [2023-11-19 07:40:45,274 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 07:40:45,279 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 45 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:45,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 41 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:40:45,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-19 07:40:45,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-11-19 07:40:45,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 50 states have internal predecessors, (56), 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 07:40:45,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2023-11-19 07:40:45,329 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 6 [2023-11-19 07:40:45,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:45,330 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2023-11-19 07:40:45,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 07:40:45,330 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2023-11-19 07:40:45,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-19 07:40:45,331 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:45,331 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:40:45,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:40:45,333 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 07:40:45,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:45,334 INFO L85 PathProgramCache]: Analyzing trace with hash 889510732, now seen corresponding path program 1 times [2023-11-19 07:40:45,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:45,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918550850] [2023-11-19 07:40:45,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:45,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:45,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:45,731 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 07:40:45,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:45,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918550850] [2023-11-19 07:40:45,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918550850] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:45,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:45,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:40:45,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989634521] [2023-11-19 07:40:45,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:45,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:40:45,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:45,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:40:45,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:40:45,738 INFO L87 Difference]: Start difference. First operand 51 states and 56 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 07:40:45,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:45,874 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2023-11-19 07:40:45,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:40:45,875 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 07:40:45,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:45,877 INFO L225 Difference]: With dead ends: 98 [2023-11-19 07:40:45,878 INFO L226 Difference]: Without dead ends: 98 [2023-11-19 07:40:45,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 07:40:45,880 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 50 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:45,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 133 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:40:45,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-19 07:40:45,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 54. [2023-11-19 07:40:45,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 53 states have internal predecessors, (60), 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 07:40:45,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2023-11-19 07:40:45,893 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 6 [2023-11-19 07:40:45,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:45,894 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2023-11-19 07:40:45,894 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 07:40:45,895 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2023-11-19 07:40:45,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-19 07:40:45,895 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:45,896 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:40:45,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:40:45,897 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 07:40:45,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:45,898 INFO L85 PathProgramCache]: Analyzing trace with hash 889570314, now seen corresponding path program 1 times [2023-11-19 07:40:45,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:45,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638122449] [2023-11-19 07:40:45,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:45,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:46,099 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 07:40:46,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:46,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638122449] [2023-11-19 07:40:46,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638122449] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:46,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:46,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:40:46,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781065719] [2023-11-19 07:40:46,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:46,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:40:46,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:46,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:40:46,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:46,104 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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 07:40:46,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:46,180 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2023-11-19 07:40:46,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:40:46,181 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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 07:40:46,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:46,182 INFO L225 Difference]: With dead ends: 53 [2023-11-19 07:40:46,183 INFO L226 Difference]: Without dead ends: 53 [2023-11-19 07:40:46,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:46,185 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 99 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:46,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 81 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:40:46,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-19 07:40:46,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2023-11-19 07:40:46,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:46,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2023-11-19 07:40:46,195 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 6 [2023-11-19 07:40:46,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:46,195 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2023-11-19 07:40:46,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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 07:40:46,196 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2023-11-19 07:40:46,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 07:40:46,197 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:46,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:46,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:40:46,198 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 07:40:46,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:46,199 INFO L85 PathProgramCache]: Analyzing trace with hash 121320236, now seen corresponding path program 1 times [2023-11-19 07:40:46,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:46,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808982839] [2023-11-19 07:40:46,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:46,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:46,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:46,265 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 07:40:46,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:46,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808982839] [2023-11-19 07:40:46,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808982839] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:46,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:46,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:40:46,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836269871] [2023-11-19 07:40:46,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:46,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:40:46,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:46,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:40:46,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:40:46,269 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:46,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:46,364 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2023-11-19 07:40:46,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:40:46,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-19 07:40:46,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:46,366 INFO L225 Difference]: With dead ends: 44 [2023-11-19 07:40:46,366 INFO L226 Difference]: Without dead ends: 44 [2023-11-19 07:40:46,367 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 07:40:46,368 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 37 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:46,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 34 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:40:46,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-19 07:40:46,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-19 07:40:46,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 43 states have internal predecessors, (49), 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 07:40:46,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2023-11-19 07:40:46,378 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 8 [2023-11-19 07:40:46,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:46,379 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2023-11-19 07:40:46,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:46,379 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2023-11-19 07:40:46,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 07:40:46,380 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:46,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:46,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:40:46,381 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 07:40:46,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:46,382 INFO L85 PathProgramCache]: Analyzing trace with hash 121320237, now seen corresponding path program 1 times [2023-11-19 07:40:46,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:46,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716360179] [2023-11-19 07:40:46,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:46,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:46,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:46,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716360179] [2023-11-19 07:40:46,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716360179] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:46,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:46,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:40:46,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670968747] [2023-11-19 07:40:46,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:46,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:40:46,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:46,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:40:46,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:40:46,565 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:46,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:46,619 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2023-11-19 07:40:46,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:40:46,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-19 07:40:46,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:46,625 INFO L225 Difference]: With dead ends: 38 [2023-11-19 07:40:46,625 INFO L226 Difference]: Without dead ends: 38 [2023-11-19 07:40:46,625 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 07:40:46,636 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 31 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:46,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 37 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:40:46,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-19 07:40:46,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-19 07:40:46,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 37 states have internal predecessors, (43), 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 07:40:46,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2023-11-19 07:40:46,646 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 8 [2023-11-19 07:40:46,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:46,646 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2023-11-19 07:40:46,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:46,647 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2023-11-19 07:40:46,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 07:40:46,648 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:46,648 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:46,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:40:46,649 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 07:40:46,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:46,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1535841454, now seen corresponding path program 1 times [2023-11-19 07:40:46,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:46,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580151759] [2023-11-19 07:40:46,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:46,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:46,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:46,878 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 07:40:46,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:46,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580151759] [2023-11-19 07:40:46,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580151759] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:46,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:46,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:40:46,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059142467] [2023-11-19 07:40:46,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:46,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:40:46,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:46,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:40:46,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:46,882 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:46,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:46,968 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2023-11-19 07:40:46,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:40:46,969 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-19 07:40:46,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:46,973 INFO L225 Difference]: With dead ends: 83 [2023-11-19 07:40:46,974 INFO L226 Difference]: Without dead ends: 83 [2023-11-19 07:40:46,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:40:46,980 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 104 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:46,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 165 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:40:46,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-19 07:40:46,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 44. [2023-11-19 07:40:46,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 43 states have internal predecessors, (49), 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 07:40:46,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2023-11-19 07:40:46,995 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 14 [2023-11-19 07:40:46,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:46,995 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2023-11-19 07:40:46,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:46,996 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2023-11-19 07:40:46,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 07:40:46,997 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:46,997 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:46,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:40:46,997 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 07:40:46,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:46,998 INFO L85 PathProgramCache]: Analyzing trace with hash -2058061264, now seen corresponding path program 1 times [2023-11-19 07:40:46,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:46,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323311054] [2023-11-19 07:40:46,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:47,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:47,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:47,191 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 07:40:47,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:47,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323311054] [2023-11-19 07:40:47,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323311054] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:47,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:47,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:40:47,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888999435] [2023-11-19 07:40:47,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:47,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:40:47,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:47,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:40:47,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:40:47,195 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:47,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:47,271 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2023-11-19 07:40:47,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:40:47,271 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-19 07:40:47,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:47,273 INFO L225 Difference]: With dead ends: 55 [2023-11-19 07:40:47,273 INFO L226 Difference]: Without dead ends: 55 [2023-11-19 07:40:47,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:40:47,277 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 151 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:47,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 70 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:40:47,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-19 07:40:47,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2023-11-19 07:40:47,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 37 states have internal predecessors, (42), 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 07:40:47,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2023-11-19 07:40:47,294 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 14 [2023-11-19 07:40:47,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:47,295 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2023-11-19 07:40:47,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:47,295 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2023-11-19 07:40:47,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 07:40:47,297 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:47,297 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 07:40:47,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:40:47,298 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 07:40:47,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:47,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1028076723, now seen corresponding path program 1 times [2023-11-19 07:40:47,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:47,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407813470] [2023-11-19 07:40:47,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:47,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:47,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:47,642 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 07:40:47,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:47,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407813470] [2023-11-19 07:40:47,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407813470] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:47,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:47,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 07:40:47,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79088578] [2023-11-19 07:40:47,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:47,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:40:47,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:47,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:40:47,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:40:47,647 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 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 07:40:47,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:47,804 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2023-11-19 07:40:47,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:40:47,805 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 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 07:40:47,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:47,806 INFO L225 Difference]: With dead ends: 37 [2023-11-19 07:40:47,806 INFO L226 Difference]: Without dead ends: 37 [2023-11-19 07:40:47,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:40:47,809 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 133 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:47,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 55 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:40:47,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-19 07:40:47,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-11-19 07:40:47,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 36 states have internal predecessors, (41), 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 07:40:47,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2023-11-19 07:40:47,826 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 17 [2023-11-19 07:40:47,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:47,827 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2023-11-19 07:40:47,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 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 07:40:47,827 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2023-11-19 07:40:47,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 07:40:47,829 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:47,829 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 07:40:47,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:40:47,830 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 07:40:47,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:47,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1028076724, now seen corresponding path program 1 times [2023-11-19 07:40:47,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:47,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106008359] [2023-11-19 07:40:47,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:47,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:47,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:48,375 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 07:40:48,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:48,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106008359] [2023-11-19 07:40:48,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106008359] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:48,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:48,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 07:40:48,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526142170] [2023-11-19 07:40:48,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:48,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:40:48,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:48,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:40:48,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:40:48,382 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 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 07:40:48,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:48,675 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2023-11-19 07:40:48,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:40:48,675 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 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 07:40:48,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:48,676 INFO L225 Difference]: With dead ends: 43 [2023-11-19 07:40:48,677 INFO L226 Difference]: Without dead ends: 43 [2023-11-19 07:40:48,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:40:48,680 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 188 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:48,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 75 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:40:48,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-19 07:40:48,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2023-11-19 07:40:48,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.303030303030303) internal successors, (43), 38 states have internal predecessors, (43), 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 07:40:48,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2023-11-19 07:40:48,700 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 17 [2023-11-19 07:40:48,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:48,702 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2023-11-19 07:40:48,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 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 07:40:48,709 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2023-11-19 07:40:48,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 07:40:48,710 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:48,710 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:48,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:40:48,711 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 07:40:48,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:48,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1805607356, now seen corresponding path program 1 times [2023-11-19 07:40:48,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:48,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086877247] [2023-11-19 07:40:48,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:48,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:48,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:49,090 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 07:40:49,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:49,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086877247] [2023-11-19 07:40:49,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086877247] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:49,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:49,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 07:40:49,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470286840] [2023-11-19 07:40:49,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:49,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:40:49,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:49,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:40:49,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:40:49,093 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:49,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:49,314 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2023-11-19 07:40:49,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:40:49,315 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-19 07:40:49,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:49,316 INFO L225 Difference]: With dead ends: 46 [2023-11-19 07:40:49,316 INFO L226 Difference]: Without dead ends: 46 [2023-11-19 07:40:49,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:40:49,318 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 102 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:49,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 89 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:40:49,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-19 07:40:49,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 38. [2023-11-19 07:40:49,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 37 states have internal predecessors, (42), 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 07:40:49,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2023-11-19 07:40:49,328 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 18 [2023-11-19 07:40:49,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:49,329 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2023-11-19 07:40:49,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:49,329 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2023-11-19 07:40:49,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 07:40:49,330 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:49,330 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:49,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:40:49,331 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 07:40:49,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:49,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1805607357, now seen corresponding path program 1 times [2023-11-19 07:40:49,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:49,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715869976] [2023-11-19 07:40:49,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:49,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:49,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:50,169 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 07:40:50,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:50,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715869976] [2023-11-19 07:40:50,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715869976] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:50,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:50,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 07:40:50,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983523760] [2023-11-19 07:40:50,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:50,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:40:50,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:50,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:40:50,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:40:50,173 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:50,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:50,631 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2023-11-19 07:40:50,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:40:50,632 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-19 07:40:50,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:50,633 INFO L225 Difference]: With dead ends: 74 [2023-11-19 07:40:50,633 INFO L226 Difference]: Without dead ends: 74 [2023-11-19 07:40:50,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:40:50,634 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 113 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:50,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 189 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:40:50,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-19 07:40:50,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2023-11-19 07:40:50,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 51 states have internal predecessors, (56), 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 07:40:50,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2023-11-19 07:40:50,639 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 18 [2023-11-19 07:40:50,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:50,640 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2023-11-19 07:40:50,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:50,641 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2023-11-19 07:40:50,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 07:40:50,642 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:50,642 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:50,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:40:50,642 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 07:40:50,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:50,643 INFO L85 PathProgramCache]: Analyzing trace with hash 525743679, now seen corresponding path program 1 times [2023-11-19 07:40:50,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:50,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844604386] [2023-11-19 07:40:50,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:50,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:50,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:51,306 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 07:40:51,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:51,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844604386] [2023-11-19 07:40:51,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844604386] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:51,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:51,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-19 07:40:51,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455968891] [2023-11-19 07:40:51,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:51,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:40:51,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:51,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:40:51,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:40:51,310 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:51,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:51,684 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2023-11-19 07:40:51,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:40:51,686 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-19 07:40:51,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:51,691 INFO L225 Difference]: With dead ends: 54 [2023-11-19 07:40:51,691 INFO L226 Difference]: Without dead ends: 54 [2023-11-19 07:40:51,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:40:51,693 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 151 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:51,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 103 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:40:51,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-19 07:40:51,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2023-11-19 07:40:51,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 38 states have internal predecessors, (43), 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 07:40:51,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2023-11-19 07:40:51,706 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 18 [2023-11-19 07:40:51,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:51,707 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2023-11-19 07:40:51,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:51,707 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2023-11-19 07:40:51,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-19 07:40:51,710 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:51,710 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 07:40:51,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 07:40:51,712 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 07:40:51,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:51,712 INFO L85 PathProgramCache]: Analyzing trace with hash -943185184, now seen corresponding path program 1 times [2023-11-19 07:40:51,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:51,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176021760] [2023-11-19 07:40:51,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:51,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:51,838 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 07:40:51,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:51,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176021760] [2023-11-19 07:40:51,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176021760] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:51,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:51,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:40:51,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740336192] [2023-11-19 07:40:51,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:51,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:40:51,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:51,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:40:51,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:51,842 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 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 07:40:51,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:51,928 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2023-11-19 07:40:51,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:40:51,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 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 07:40:51,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:51,929 INFO L225 Difference]: With dead ends: 38 [2023-11-19 07:40:51,930 INFO L226 Difference]: Without dead ends: 38 [2023-11-19 07:40:51,930 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 07:40:51,931 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:51,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 82 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:40:51,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-19 07:40:51,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-19 07:40:51,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 37 states have internal predecessors, (42), 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 07:40:51,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2023-11-19 07:40:51,935 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 23 [2023-11-19 07:40:51,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:51,936 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2023-11-19 07:40:51,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 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 07:40:51,937 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2023-11-19 07:40:51,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-19 07:40:51,940 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:51,940 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 07:40:51,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 07:40:51,941 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 07:40:51,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:51,942 INFO L85 PathProgramCache]: Analyzing trace with hash -943185183, now seen corresponding path program 1 times [2023-11-19 07:40:51,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:51,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950399072] [2023-11-19 07:40:51,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:51,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:52,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:52,192 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 07:40:52,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:52,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950399072] [2023-11-19 07:40:52,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950399072] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:52,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:52,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:40:52,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894467328] [2023-11-19 07:40:52,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:52,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:40:52,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:52,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:40:52,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:40:52,195 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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 07:40:52,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:52,283 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2023-11-19 07:40:52,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:40:52,284 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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 07:40:52,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:52,285 INFO L225 Difference]: With dead ends: 77 [2023-11-19 07:40:52,285 INFO L226 Difference]: Without dead ends: 77 [2023-11-19 07:40:52,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:40:52,286 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 77 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:52,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 176 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:40:52,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-19 07:40:52,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 56. [2023-11-19 07:40:52,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 55 states have internal predecessors, (61), 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 07:40:52,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2023-11-19 07:40:52,292 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 23 [2023-11-19 07:40:52,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:52,293 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2023-11-19 07:40:52,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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 07:40:52,293 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2023-11-19 07:40:52,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-19 07:40:52,297 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:52,298 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:52,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 07:40:52,298 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 07:40:52,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:52,300 INFO L85 PathProgramCache]: Analyzing trace with hash -922163051, now seen corresponding path program 1 times [2023-11-19 07:40:52,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:52,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662507445] [2023-11-19 07:40:52,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:52,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:52,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:52,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:52,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662507445] [2023-11-19 07:40:52,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662507445] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:52,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:52,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:40:52,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528210873] [2023-11-19 07:40:52,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:52,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:40:52,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:52,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:40:52,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:40:52,519 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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 07:40:52,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:52,593 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2023-11-19 07:40:52,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:40:52,594 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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 07:40:52,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:52,597 INFO L225 Difference]: With dead ends: 64 [2023-11-19 07:40:52,597 INFO L226 Difference]: Without dead ends: 64 [2023-11-19 07:40:52,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:40:52,600 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 46 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:52,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 159 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:40:52,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-19 07:40:52,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2023-11-19 07:40:52,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 57 states have internal predecessors, (63), 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 07:40:52,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2023-11-19 07:40:52,607 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 23 [2023-11-19 07:40:52,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:52,608 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2023-11-19 07:40:52,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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 07:40:52,608 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2023-11-19 07:40:52,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-19 07:40:52,612 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:52,613 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 07:40:52,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-19 07:40:52,613 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 07:40:52,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:52,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1760833633, now seen corresponding path program 1 times [2023-11-19 07:40:52,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:52,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078821694] [2023-11-19 07:40:52,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:52,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:54,167 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 07:40:54,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:54,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078821694] [2023-11-19 07:40:54,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078821694] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:54,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:54,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-19 07:40:54,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53426212] [2023-11-19 07:40:54,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:54,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:40:54,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:54,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:40:54,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:40:54,172 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 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 07:40:55,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:55,489 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2023-11-19 07:40:55,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 07:40:55,490 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 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 07:40:55,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:55,492 INFO L225 Difference]: With dead ends: 65 [2023-11-19 07:40:55,493 INFO L226 Difference]: Without dead ends: 65 [2023-11-19 07:40:55,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2023-11-19 07:40:55,494 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 96 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:55,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 119 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:40:55,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-19 07:40:55,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2023-11-19 07:40:55,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 62 states have internal predecessors, (70), 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 07:40:55,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2023-11-19 07:40:55,501 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 23 [2023-11-19 07:40:55,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:55,502 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2023-11-19 07:40:55,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 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 07:40:55,503 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2023-11-19 07:40:55,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-19 07:40:55,506 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:55,506 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:55,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-19 07:40:55,507 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 07:40:55,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:55,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1739811501, now seen corresponding path program 1 times [2023-11-19 07:40:55,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:55,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796524418] [2023-11-19 07:40:55,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:55,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:55,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:56,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:56,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796524418] [2023-11-19 07:40:56,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796524418] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:56,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:56,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-19 07:40:56,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291989727] [2023-11-19 07:40:56,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:56,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:40:56,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:56,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:40:56,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:40:56,421 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 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 07:40:57,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:57,117 INFO L93 Difference]: Finished difference Result 112 states and 121 transitions. [2023-11-19 07:40:57,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:40:57,118 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 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 07:40:57,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:57,119 INFO L225 Difference]: With dead ends: 112 [2023-11-19 07:40:57,120 INFO L226 Difference]: Without dead ends: 112 [2023-11-19 07:40:57,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2023-11-19 07:40:57,121 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 52 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:57,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 244 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:40:57,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-11-19 07:40:57,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2023-11-19 07:40:57,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 90 states have (on average 1.1333333333333333) internal successors, (102), 93 states have internal predecessors, (102), 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 07:40:57,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2023-11-19 07:40:57,126 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 23 [2023-11-19 07:40:57,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:57,126 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2023-11-19 07:40:57,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 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 07:40:57,127 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2023-11-19 07:40:57,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-19 07:40:57,128 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:57,128 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:57,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-19 07:40:57,129 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 07:40:57,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:57,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1317109675, now seen corresponding path program 1 times [2023-11-19 07:40:57,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:57,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625469906] [2023-11-19 07:40:57,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:57,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:57,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:57,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625469906] [2023-11-19 07:40:57,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625469906] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:57,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204546497] [2023-11-19 07:40:57,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:57,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:57,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe878f-f536-4307-9a4d-7ca0f3f06ce5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:57,871 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe878f-f536-4307-9a4d-7ca0f3f06ce5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:57,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe878f-f536-4307-9a4d-7ca0f3f06ce5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:40:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:58,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-19 07:40:58,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:58,147 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 14 treesize of output 10 [2023-11-19 07:40:58,262 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-19 07:40:58,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 16 treesize of output 15 [2023-11-19 07:40:58,339 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 07:40:58,340 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 07:40:58,421 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 07:40:58,810 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 07:40:59,074 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:40:59,075 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 20 treesize of output 17 [2023-11-19 07:40:59,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:59,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:00,230 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:00,231 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 23 treesize of output 24 [2023-11-19 07:41:00,238 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:41:00,254 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-19 07:41:00,254 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 21 treesize of output 13 [2023-11-19 07:41:00,268 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:41:00,271 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 37 treesize of output 29 [2023-11-19 07:41:00,286 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-19 07:41:00,287 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 07:41:00,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:00,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204546497] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:00,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:00,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2023-11-19 07:41:00,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817908644] [2023-11-19 07:41:00,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:00,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-19 07:41:00,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:00,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-19 07:41:00,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=728, Unknown=1, NotChecked=0, Total=812 [2023-11-19 07:41:00,306 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 29 states have internal predecessors, (56), 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 07:41:02,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:02,326 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2023-11-19 07:41:02,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:41:02,327 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 29 states have internal predecessors, (56), 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 07:41:02,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:02,328 INFO L225 Difference]: With dead ends: 102 [2023-11-19 07:41:02,329 INFO L226 Difference]: Without dead ends: 102 [2023-11-19 07:41:02,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=223, Invalid=1336, Unknown=1, NotChecked=0, Total=1560 [2023-11-19 07:41:02,331 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 159 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:02,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 215 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 07:41:02,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-19 07:41:02,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2023-11-19 07:41:02,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 97 states have internal predecessors, (107), 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 07:41:02,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2023-11-19 07:41:02,336 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 23 [2023-11-19 07:41:02,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:02,337 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2023-11-19 07:41:02,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 29 states have internal predecessors, (56), 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 07:41:02,338 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2023-11-19 07:41:02,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-19 07:41:02,338 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:02,339 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:02,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe878f-f536-4307-9a4d-7ca0f3f06ce5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:02,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe878f-f536-4307-9a4d-7ca0f3f06ce5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-19 07:41:02,540 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 07:41:02,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:02,540 INFO L85 PathProgramCache]: Analyzing trace with hash 2119273020, now seen corresponding path program 1 times [2023-11-19 07:41:02,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:02,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997844282] [2023-11-19 07:41:02,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:02,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:02,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:04,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:04,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:04,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997844282] [2023-11-19 07:41:04,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997844282] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:04,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105629717] [2023-11-19 07:41:04,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:04,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:04,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe878f-f536-4307-9a4d-7ca0f3f06ce5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:04,048 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe878f-f536-4307-9a4d-7ca0f3f06ce5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:04,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe878f-f536-4307-9a4d-7ca0f3f06ce5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:41:04,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:04,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-19 07:41:04,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:04,260 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-19 07:41:04,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 21 treesize of output 13 [2023-11-19 07:41:04,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2023-11-19 07:41:04,449 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-19 07:41:04,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 16 treesize of output 15 [2023-11-19 07:41:04,479 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-19 07:41:04,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-19 07:41:04,546 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 15 treesize of output 1 [2023-11-19 07:41:04,553 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 11 treesize of output 7 [2023-11-19 07:41:04,707 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 27 treesize of output 15 [2023-11-19 07:41:04,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2023-11-19 07:41:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:05,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:06,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:06,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105629717] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:06,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:06,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 39 [2023-11-19 07:41:06,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826803121] [2023-11-19 07:41:06,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:06,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-19 07:41:06,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:06,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-19 07:41:06,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1439, Unknown=0, NotChecked=0, Total=1560 [2023-11-19 07:41:06,790 INFO L87 Difference]: Start difference. First operand 98 states and 107 transitions. Second operand has 40 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 40 states have internal predecessors, (67), 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 07:41:11,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:11,769 INFO L93 Difference]: Finished difference Result 109 states and 120 transitions. [2023-11-19 07:41:11,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-19 07:41:11,769 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 40 states have internal predecessors, (67), 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 07:41:11,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:11,771 INFO L225 Difference]: With dead ends: 109 [2023-11-19 07:41:11,771 INFO L226 Difference]: Without dead ends: 109 [2023-11-19 07:41:11,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=575, Invalid=3207, Unknown=0, NotChecked=0, Total=3782 [2023-11-19 07:41:11,774 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 320 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:11,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 223 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 07:41:11,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-19 07:41:11,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2023-11-19 07:41:11,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 104 states have internal predecessors, (117), 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 07:41:11,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2023-11-19 07:41:11,779 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 24 [2023-11-19 07:41:11,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:11,780 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2023-11-19 07:41:11,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 40 states have internal predecessors, (67), 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 07:41:11,781 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2023-11-19 07:41:11,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-19 07:41:11,781 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:11,781 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 07:41:11,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe878f-f536-4307-9a4d-7ca0f3f06ce5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:12,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe878f-f536-4307-9a4d-7ca0f3f06ce5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:12,007 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 07:41:12,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:12,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1699740602, now seen corresponding path program 1 times [2023-11-19 07:41:12,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:12,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397081589] [2023-11-19 07:41:12,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:12,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:12,613 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 07:41:12,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:12,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397081589] [2023-11-19 07:41:12,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397081589] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:12,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:12,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:41:12,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453620376] [2023-11-19 07:41:12,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:12,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:41:12,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:12,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:41:12,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:41:12,617 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 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 07:41:12,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:12,684 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2023-11-19 07:41:12,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:41:12,685 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 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 26 [2023-11-19 07:41:12,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:12,686 INFO L225 Difference]: With dead ends: 104 [2023-11-19 07:41:12,686 INFO L226 Difference]: Without dead ends: 64 [2023-11-19 07:41:12,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:41:12,687 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:12,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 68 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:41:12,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-19 07:41:12,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-11-19 07:41:12,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 63 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 07:41:12,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2023-11-19 07:41:12,697 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 26 [2023-11-19 07:41:12,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:12,698 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2023-11-19 07:41:12,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 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 07:41:12,698 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2023-11-19 07:41:12,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-19 07:41:12,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:12,699 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:12,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-19 07:41:12,699 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-19 07:41:12,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:12,700 INFO L85 PathProgramCache]: Analyzing trace with hash -2024796265, now seen corresponding path program 1 times [2023-11-19 07:41:12,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:12,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49170042] [2023-11-19 07:41:12,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:12,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:14,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:14,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49170042] [2023-11-19 07:41:14,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49170042] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:14,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229177788] [2023-11-19 07:41:14,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:14,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:14,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe878f-f536-4307-9a4d-7ca0f3f06ce5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:14,472 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe878f-f536-4307-9a4d-7ca0f3f06ce5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:14,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bfe878f-f536-4307-9a4d-7ca0f3f06ce5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:41:14,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:14,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-19 07:41:14,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:14,896 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-19 07:41:14,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 21 treesize of output 13 [2023-11-19 07:41:14,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2023-11-19 07:41:15,085 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-19 07:41:15,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 16 treesize of output 15 [2023-11-19 07:41:15,119 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-19 07:41:15,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-19 07:41:15,186 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 11 treesize of output 7 [2023-11-19 07:41:15,195 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 15 treesize of output 1 [2023-11-19 07:41:15,364 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 27 treesize of output 15 [2023-11-19 07:41:15,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2023-11-19 07:41:16,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:16,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:17,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229177788] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:17,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:17,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 45 [2023-11-19 07:41:17,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129215809] [2023-11-19 07:41:17,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:17,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-19 07:41:17,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:17,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-19 07:41:17,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1937, Unknown=0, NotChecked=0, Total=2070 [2023-11-19 07:41:17,873 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 46 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)