./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-broom/dll-middle-shared.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/dll-middle-shared.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx --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 d8b0e8aa94f77bf1afa5295afab3fc9fce32b5bdbad38c3bd4a8f1e24260f6fc --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 20:59:55,992 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 20:59:56,118 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2023-11-21 20:59:56,130 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 20:59:56,132 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 20:59:56,172 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 20:59:56,173 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 20:59:56,174 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 20:59:56,176 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 20:59:56,181 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 20:59:56,182 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 20:59:56,183 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 20:59:56,183 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 20:59:56,185 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 20:59:56,186 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 20:59:56,187 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 20:59:56,187 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 20:59:56,188 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 20:59:56,188 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 20:59:56,189 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 20:59:56,190 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 20:59:56,190 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 20:59:56,191 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 20:59:56,192 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 20:59:56,192 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 20:59:56,193 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 20:59:56,194 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 20:59:56,194 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 20:59:56,195 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 20:59:56,195 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 20:59:56,197 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 20:59:56,197 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 20:59:56,197 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 20:59:56,198 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 20:59:56,198 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 20:59:56,199 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 20:59:56,199 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_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8b0e8aa94f77bf1afa5295afab3fc9fce32b5bdbad38c3bd4a8f1e24260f6fc [2023-11-21 20:59:56,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 20:59:56,569 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 20:59:56,572 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 20:59:56,574 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 20:59:56,575 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 20:59:56,576 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/memsafety-broom/dll-middle-shared.i [2023-11-21 20:59:59,681 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 21:00:00,015 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 21:00:00,016 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/sv-benchmarks/c/memsafety-broom/dll-middle-shared.i [2023-11-21 21:00:00,070 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/data/126f0f6e4/8cf5455ea5b541a2a9d0e947bec492fc/FLAG0880d2df3 [2023-11-21 21:00:00,090 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/data/126f0f6e4/8cf5455ea5b541a2a9d0e947bec492fc [2023-11-21 21:00:00,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 21:00:00,094 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 21:00:00,096 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 21:00:00,096 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 21:00:00,105 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 21:00:00,106 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:00:00" (1/1) ... [2023-11-21 21:00:00,107 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@467e327f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:00, skipping insertion in model container [2023-11-21 21:00:00,108 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:00:00" (1/1) ... [2023-11-21 21:00:00,196 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 21:00:00,382 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-21 21:00:00,580 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:00:00,591 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 21:00:00,609 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-21 21:00:00,634 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:00:00,659 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 21:00:00,668 INFO L206 MainTranslator]: Completed translation [2023-11-21 21:00:00,668 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:00 WrapperNode [2023-11-21 21:00:00,668 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 21:00:00,670 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 21:00:00,670 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 21:00:00,670 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 21:00:00,678 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:00" (1/1) ... [2023-11-21 21:00:00,719 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:00" (1/1) ... [2023-11-21 21:00:00,761 INFO L138 Inliner]: procedures = 122, calls = 35, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 99 [2023-11-21 21:00:00,762 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 21:00:00,767 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 21:00:00,768 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 21:00:00,768 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 21:00:00,776 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:00" (1/1) ... [2023-11-21 21:00:00,776 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:00" (1/1) ... [2023-11-21 21:00:00,780 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:00" (1/1) ... [2023-11-21 21:00:00,780 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:00" (1/1) ... [2023-11-21 21:00:00,802 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:00" (1/1) ... [2023-11-21 21:00:00,806 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:00" (1/1) ... [2023-11-21 21:00:00,808 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:00" (1/1) ... [2023-11-21 21:00:00,810 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:00" (1/1) ... [2023-11-21 21:00:00,813 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 21:00:00,814 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 21:00:00,815 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 21:00:00,815 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 21:00:00,832 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:00" (1/1) ... [2023-11-21 21:00:00,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 21:00:00,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:00,870 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 21:00:00,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 21:00:00,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 21:00:00,917 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2023-11-21 21:00:00,917 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2023-11-21 21:00:00,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 21:00:00,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 21:00:00,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 21:00:00,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 21:00:00,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 21:00:00,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 21:00:01,045 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 21:00:01,047 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 21:00:01,548 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 21:00:01,638 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 21:00:01,638 INFO L308 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-21 21:00:01,640 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:00:01 BoogieIcfgContainer [2023-11-21 21:00:01,640 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 21:00:01,648 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 21:00:01,648 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 21:00:01,651 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 21:00:01,652 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:00:00" (1/3) ... [2023-11-21 21:00:01,653 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6275479f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:00:01, skipping insertion in model container [2023-11-21 21:00:01,653 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:00" (2/3) ... [2023-11-21 21:00:01,653 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6275479f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:00:01, skipping insertion in model container [2023-11-21 21:00:01,653 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:00:01" (3/3) ... [2023-11-21 21:00:01,655 INFO L112 eAbstractionObserver]: Analyzing ICFG dll-middle-shared.i [2023-11-21 21:00:01,672 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 21:00:01,672 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 50 error locations. [2023-11-21 21:00:01,728 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 21:00:01,735 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;@6198440, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 21:00:01,736 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2023-11-21 21:00:01,741 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 39 states have (on average 2.41025641025641) internal successors, (94), 89 states have internal predecessors, (94), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 21:00:01,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-21 21:00:01,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:01,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-21 21:00:01,753 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:01,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:01,760 INFO L85 PathProgramCache]: Analyzing trace with hash 6012979, now seen corresponding path program 1 times [2023-11-21 21:00:01,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:01,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359382799] [2023-11-21 21:00:01,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:01,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:02,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:02,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:02,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359382799] [2023-11-21 21:00:02,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359382799] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:02,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:02,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 21:00:02,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522803308] [2023-11-21 21:00:02,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:02,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:00:02,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:02,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:00:02,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:00:02,111 INFO L87 Difference]: Start difference. First operand has 93 states, 39 states have (on average 2.41025641025641) internal successors, (94), 89 states have internal predecessors, (94), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:00:02,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:02,299 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2023-11-21 21:00:02,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:00:02,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-21 21:00:02,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:02,312 INFO L225 Difference]: With dead ends: 91 [2023-11-21 21:00:02,312 INFO L226 Difference]: Without dead ends: 90 [2023-11-21 21:00:02,315 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 [2023-11-21 21:00:02,319 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 4 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:02,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 115 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 21:00:02,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-21 21:00:02,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2023-11-21 21:00:02,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 86 states have internal predecessors, (90), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 21:00:02,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2023-11-21 21:00:02,394 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 4 [2023-11-21 21:00:02,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:02,394 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2023-11-21 21:00:02,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:00:02,395 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2023-11-21 21:00:02,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-21 21:00:02,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:02,395 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-21 21:00:02,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 21:00:02,397 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:02,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:02,398 INFO L85 PathProgramCache]: Analyzing trace with hash 6012980, now seen corresponding path program 1 times [2023-11-21 21:00:02,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:02,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822857597] [2023-11-21 21:00:02,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:02,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:02,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:02,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:02,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822857597] [2023-11-21 21:00:02,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822857597] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:02,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:02,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 21:00:02,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206571009] [2023-11-21 21:00:02,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:02,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:00:02,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:02,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:00:02,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:00:02,589 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:00:02,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:02,715 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2023-11-21 21:00:02,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:00:02,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-21 21:00:02,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:02,718 INFO L225 Difference]: With dead ends: 88 [2023-11-21 21:00:02,718 INFO L226 Difference]: Without dead ends: 88 [2023-11-21 21:00:02,723 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 [2023-11-21 21:00:02,725 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 2 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:02,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 122 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 21:00:02,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-21 21:00:02,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-11-21 21:00:02,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 84 states have internal predecessors, (88), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 21:00:02,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2023-11-21 21:00:02,738 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 4 [2023-11-21 21:00:02,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:02,739 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2023-11-21 21:00:02,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:00:02,739 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2023-11-21 21:00:02,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 21:00:02,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:02,740 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:02,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 21:00:02,740 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:02,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:02,741 INFO L85 PathProgramCache]: Analyzing trace with hash -276495055, now seen corresponding path program 1 times [2023-11-21 21:00:02,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:02,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057748163] [2023-11-21 21:00:02,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:02,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:02,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:02,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:02,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:02,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:02,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057748163] [2023-11-21 21:00:02,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057748163] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:02,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:02,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 21:00:02,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109636258] [2023-11-21 21:00:02,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:02,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 21:00:02,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:02,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 21:00:02,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 21:00:02,897 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:03,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:03,077 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2023-11-21 21:00:03,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 21:00:03,078 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-11-21 21:00:03,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:03,083 INFO L225 Difference]: With dead ends: 91 [2023-11-21 21:00:03,084 INFO L226 Difference]: Without dead ends: 91 [2023-11-21 21:00:03,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 21:00:03,094 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 13 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:03,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 132 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 21:00:03,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-21 21:00:03,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2023-11-21 21:00:03,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 39 states have (on average 2.230769230769231) internal successors, (87), 83 states have internal predecessors, (87), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 21:00:03,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2023-11-21 21:00:03,109 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 8 [2023-11-21 21:00:03,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:03,110 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2023-11-21 21:00:03,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:03,111 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2023-11-21 21:00:03,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 21:00:03,117 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:03,118 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:03,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 21:00:03,118 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:03,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:03,119 INFO L85 PathProgramCache]: Analyzing trace with hash -276495056, now seen corresponding path program 1 times [2023-11-21 21:00:03,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:03,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301594496] [2023-11-21 21:00:03,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:03,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:03,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:03,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:03,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:03,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:03,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:03,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301594496] [2023-11-21 21:00:03,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301594496] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:03,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:03,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 21:00:03,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620186364] [2023-11-21 21:00:03,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:03,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 21:00:03,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:03,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 21:00:03,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 21:00:03,239 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:03,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:03,399 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2023-11-21 21:00:03,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 21:00:03,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-11-21 21:00:03,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:03,400 INFO L225 Difference]: With dead ends: 90 [2023-11-21 21:00:03,400 INFO L226 Difference]: Without dead ends: 90 [2023-11-21 21:00:03,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 21:00:03,402 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 12 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:03,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 125 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 21:00:03,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-21 21:00:03,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2023-11-21 21:00:03,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 82 states have internal predecessors, (86), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 21:00:03,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2023-11-21 21:00:03,410 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 8 [2023-11-21 21:00:03,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:03,411 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2023-11-21 21:00:03,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:03,411 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2023-11-21 21:00:03,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-21 21:00:03,412 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:03,412 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:03,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 21:00:03,412 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:03,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:03,413 INFO L85 PathProgramCache]: Analyzing trace with hash 18592277, now seen corresponding path program 1 times [2023-11-21 21:00:03,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:03,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452848669] [2023-11-21 21:00:03,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:03,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:03,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:03,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:03,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:03,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452848669] [2023-11-21 21:00:03,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452848669] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:03,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:03,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 21:00:03,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927870146] [2023-11-21 21:00:03,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:03,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 21:00:03,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:03,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 21:00:03,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 21:00:03,493 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:03,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:03,648 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2023-11-21 21:00:03,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 21:00:03,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-11-21 21:00:03,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:03,650 INFO L225 Difference]: With dead ends: 89 [2023-11-21 21:00:03,650 INFO L226 Difference]: Without dead ends: 89 [2023-11-21 21:00:03,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 21:00:03,652 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 11 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:03,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 124 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 21:00:03,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-21 21:00:03,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2023-11-21 21:00:03,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 81 states have internal predecessors, (85), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 21:00:03,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2023-11-21 21:00:03,672 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 9 [2023-11-21 21:00:03,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:03,672 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2023-11-21 21:00:03,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:03,673 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2023-11-21 21:00:03,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-21 21:00:03,674 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:03,674 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:03,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 21:00:03,674 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:03,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:03,675 INFO L85 PathProgramCache]: Analyzing trace with hash 18592278, now seen corresponding path program 1 times [2023-11-21 21:00:03,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:03,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107776850] [2023-11-21 21:00:03,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:03,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:03,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:03,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:03,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:03,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107776850] [2023-11-21 21:00:03,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107776850] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:03,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:03,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 21:00:03,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524198267] [2023-11-21 21:00:03,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:03,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 21:00:03,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:03,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 21:00:03,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 21:00:03,780 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:03,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:03,929 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2023-11-21 21:00:03,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 21:00:03,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-11-21 21:00:03,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:03,931 INFO L225 Difference]: With dead ends: 88 [2023-11-21 21:00:03,931 INFO L226 Difference]: Without dead ends: 88 [2023-11-21 21:00:03,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 21:00:03,933 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 10 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:03,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 131 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 21:00:03,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-21 21:00:03,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2023-11-21 21:00:03,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 80 states have internal predecessors, (84), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 21:00:03,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2023-11-21 21:00:03,940 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 9 [2023-11-21 21:00:03,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:03,940 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2023-11-21 21:00:03,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:03,940 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2023-11-21 21:00:03,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-21 21:00:03,941 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:03,941 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:03,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 21:00:03,942 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:03,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:03,942 INFO L85 PathProgramCache]: Analyzing trace with hash 576365043, now seen corresponding path program 1 times [2023-11-21 21:00:03,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:03,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487284744] [2023-11-21 21:00:03,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:03,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:04,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:04,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:04,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:04,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487284744] [2023-11-21 21:00:04,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487284744] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:04,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:04,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 21:00:04,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398620924] [2023-11-21 21:00:04,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:04,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 21:00:04,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:04,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 21:00:04,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 21:00:04,206 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:04,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:04,469 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2023-11-21 21:00:04,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 21:00:04,470 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-21 21:00:04,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:04,471 INFO L225 Difference]: With dead ends: 82 [2023-11-21 21:00:04,471 INFO L226 Difference]: Without dead ends: 82 [2023-11-21 21:00:04,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-21 21:00:04,472 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 24 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:04,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 211 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 21:00:04,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-21 21:00:04,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2023-11-21 21:00:04,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 39 states have (on average 2.0) internal successors, (78), 74 states have internal predecessors, (78), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 21:00:04,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2023-11-21 21:00:04,477 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 10 [2023-11-21 21:00:04,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:04,478 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2023-11-21 21:00:04,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:04,478 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2023-11-21 21:00:04,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-21 21:00:04,479 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:04,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:04,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 21:00:04,479 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:04,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:04,480 INFO L85 PathProgramCache]: Analyzing trace with hash 576365044, now seen corresponding path program 1 times [2023-11-21 21:00:04,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:04,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42846982] [2023-11-21 21:00:04,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:04,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:04,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:04,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:04,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:04,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:04,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42846982] [2023-11-21 21:00:04,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42846982] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:04,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:04,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 21:00:04,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662175727] [2023-11-21 21:00:04,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:04,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 21:00:04,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:04,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 21:00:04,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-21 21:00:04,861 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 9 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:05,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:05,135 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2023-11-21 21:00:05,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 21:00:05,136 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-21 21:00:05,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:05,137 INFO L225 Difference]: With dead ends: 80 [2023-11-21 21:00:05,137 INFO L226 Difference]: Without dead ends: 80 [2023-11-21 21:00:05,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-21 21:00:05,138 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 8 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:05,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 212 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 21:00:05,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-21 21:00:05,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2023-11-21 21:00:05,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 72 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 21:00:05,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2023-11-21 21:00:05,144 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 10 [2023-11-21 21:00:05,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:05,144 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2023-11-21 21:00:05,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:05,145 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2023-11-21 21:00:05,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 21:00:05,145 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:05,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:05,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 21:00:05,146 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:05,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:05,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1883264764, now seen corresponding path program 1 times [2023-11-21 21:00:05,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:05,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734704946] [2023-11-21 21:00:05,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:05,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:05,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:05,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:05,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:05,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:05,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734704946] [2023-11-21 21:00:05,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734704946] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:05,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:05,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 21:00:05,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715694300] [2023-11-21 21:00:05,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:05,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 21:00:05,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:05,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 21:00:05,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-21 21:00:05,287 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:05,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:05,484 INFO L93 Difference]: Finished difference Result 106 states and 115 transitions. [2023-11-21 21:00:05,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 21:00:05,485 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-21 21:00:05,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:05,486 INFO L225 Difference]: With dead ends: 106 [2023-11-21 21:00:05,486 INFO L226 Difference]: Without dead ends: 106 [2023-11-21 21:00:05,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-21 21:00:05,487 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 52 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:05,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 172 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 21:00:05,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-21 21:00:05,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 91. [2023-11-21 21:00:05,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 54 states have (on average 1.962962962962963) internal successors, (106), 86 states have internal predecessors, (106), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:00:05,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2023-11-21 21:00:05,493 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 16 [2023-11-21 21:00:05,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:05,494 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2023-11-21 21:00:05,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:05,494 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2023-11-21 21:00:05,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 21:00:05,495 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:05,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:05,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 21:00:05,495 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:05,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:05,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1883264765, now seen corresponding path program 1 times [2023-11-21 21:00:05,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:05,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639586325] [2023-11-21 21:00:05,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:05,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:05,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:05,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:05,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:05,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:05,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:05,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639586325] [2023-11-21 21:00:05,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639586325] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:05,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:05,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 21:00:05,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107637839] [2023-11-21 21:00:05,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:05,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 21:00:05,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:05,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 21:00:05,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-21 21:00:05,796 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:06,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:06,039 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2023-11-21 21:00:06,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 21:00:06,039 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-21 21:00:06,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:06,041 INFO L225 Difference]: With dead ends: 110 [2023-11-21 21:00:06,041 INFO L226 Difference]: Without dead ends: 110 [2023-11-21 21:00:06,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-21 21:00:06,042 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 30 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:06,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 332 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 21:00:06,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-21 21:00:06,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 96. [2023-11-21 21:00:06,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 59 states have (on average 1.9322033898305084) internal successors, (114), 91 states have internal predecessors, (114), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:00:06,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 120 transitions. [2023-11-21 21:00:06,047 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 120 transitions. Word has length 16 [2023-11-21 21:00:06,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:06,048 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 120 transitions. [2023-11-21 21:00:06,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:06,048 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 120 transitions. [2023-11-21 21:00:06,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-21 21:00:06,049 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:06,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:06,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 21:00:06,050 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:06,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:06,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1748248269, now seen corresponding path program 1 times [2023-11-21 21:00:06,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:06,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202290737] [2023-11-21 21:00:06,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:06,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:06,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:06,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:06,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:06,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:06,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:06,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202290737] [2023-11-21 21:00:06,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202290737] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:06,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:06,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 21:00:06,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867136565] [2023-11-21 21:00:06,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:06,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 21:00:06,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:06,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 21:00:06,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-21 21:00:06,252 INFO L87 Difference]: Start difference. First operand 96 states and 120 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:06,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:06,406 INFO L93 Difference]: Finished difference Result 108 states and 133 transitions. [2023-11-21 21:00:06,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 21:00:06,406 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-11-21 21:00:06,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:06,407 INFO L225 Difference]: With dead ends: 108 [2023-11-21 21:00:06,408 INFO L226 Difference]: Without dead ends: 108 [2023-11-21 21:00:06,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-21 21:00:06,409 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 30 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:06,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 345 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 21:00:06,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-21 21:00:06,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 98. [2023-11-21 21:00:06,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 93 states have internal predecessors, (115), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:00:06,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2023-11-21 21:00:06,413 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 17 [2023-11-21 21:00:06,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:06,414 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2023-11-21 21:00:06,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:06,414 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2023-11-21 21:00:06,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-21 21:00:06,415 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:06,415 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:06,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 21:00:06,416 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:06,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:06,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1636210928, now seen corresponding path program 1 times [2023-11-21 21:00:06,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:06,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803896673] [2023-11-21 21:00:06,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:06,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:06,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:06,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:06,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:06,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:06,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:06,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803896673] [2023-11-21 21:00:06,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803896673] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:06,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:06,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 21:00:06,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316937248] [2023-11-21 21:00:06,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:06,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 21:00:06,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:06,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 21:00:06,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 21:00:06,538 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:06,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:06,712 INFO L93 Difference]: Finished difference Result 107 states and 131 transitions. [2023-11-21 21:00:06,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 21:00:06,713 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-11-21 21:00:06,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:06,714 INFO L225 Difference]: With dead ends: 107 [2023-11-21 21:00:06,714 INFO L226 Difference]: Without dead ends: 107 [2023-11-21 21:00:06,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 21:00:06,715 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 5 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:06,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 177 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 21:00:06,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-21 21:00:06,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2023-11-21 21:00:06,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 67 states have (on average 1.8656716417910448) internal successors, (125), 99 states have internal predecessors, (125), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:00:06,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 131 transitions. [2023-11-21 21:00:06,720 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 131 transitions. Word has length 18 [2023-11-21 21:00:06,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:06,721 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 131 transitions. [2023-11-21 21:00:06,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:06,721 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 131 transitions. [2023-11-21 21:00:06,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-21 21:00:06,722 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:06,722 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:06,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-21 21:00:06,723 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:06,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:06,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1636210929, now seen corresponding path program 1 times [2023-11-21 21:00:06,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:06,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545735834] [2023-11-21 21:00:06,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:06,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:06,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:06,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:06,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:06,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545735834] [2023-11-21 21:00:06,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545735834] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:06,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:06,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 21:00:06,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156438787] [2023-11-21 21:00:06,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:06,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 21:00:06,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:06,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 21:00:06,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-21 21:00:06,947 INFO L87 Difference]: Start difference. First operand 104 states and 131 transitions. Second operand has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:07,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:07,170 INFO L93 Difference]: Finished difference Result 106 states and 129 transitions. [2023-11-21 21:00:07,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 21:00:07,170 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-11-21 21:00:07,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:07,171 INFO L225 Difference]: With dead ends: 106 [2023-11-21 21:00:07,172 INFO L226 Difference]: Without dead ends: 106 [2023-11-21 21:00:07,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-21 21:00:07,172 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 26 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:07,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 350 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 21:00:07,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-21 21:00:07,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2023-11-21 21:00:07,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 67 states have (on average 1.835820895522388) internal successors, (123), 99 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:00:07,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 129 transitions. [2023-11-21 21:00:07,177 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 129 transitions. Word has length 18 [2023-11-21 21:00:07,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:07,178 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 129 transitions. [2023-11-21 21:00:07,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:07,178 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 129 transitions. [2023-11-21 21:00:07,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-21 21:00:07,179 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:07,179 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:07,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-21 21:00:07,180 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:07,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:07,180 INFO L85 PathProgramCache]: Analyzing trace with hash 536206589, now seen corresponding path program 1 times [2023-11-21 21:00:07,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:07,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054531601] [2023-11-21 21:00:07,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:07,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:07,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:07,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 21:00:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 21:00:07,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:07,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054531601] [2023-11-21 21:00:07,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054531601] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:07,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:07,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 21:00:07,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728669092] [2023-11-21 21:00:07,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:07,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 21:00:07,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:07,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 21:00:07,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 21:00:07,418 INFO L87 Difference]: Start difference. First operand 104 states and 129 transitions. Second operand has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 21:00:07,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:07,552 INFO L93 Difference]: Finished difference Result 105 states and 128 transitions. [2023-11-21 21:00:07,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 21:00:07,553 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-11-21 21:00:07,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:07,554 INFO L225 Difference]: With dead ends: 105 [2023-11-21 21:00:07,554 INFO L226 Difference]: Without dead ends: 105 [2023-11-21 21:00:07,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 21:00:07,555 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 20 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:07,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 103 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 21:00:07,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-21 21:00:07,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2023-11-21 21:00:07,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 67 states have (on average 1.8208955223880596) internal successors, (122), 99 states have internal predecessors, (122), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:00:07,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 128 transitions. [2023-11-21 21:00:07,560 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 128 transitions. Word has length 19 [2023-11-21 21:00:07,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:07,561 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 128 transitions. [2023-11-21 21:00:07,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 21:00:07,561 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 128 transitions. [2023-11-21 21:00:07,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-21 21:00:07,562 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:07,562 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:07,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-21 21:00:07,563 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:07,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:07,563 INFO L85 PathProgramCache]: Analyzing trace with hash 536206590, now seen corresponding path program 1 times [2023-11-21 21:00:07,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:07,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125265346] [2023-11-21 21:00:07,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:07,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:07,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:07,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:07,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 21:00:07,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:08,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 21:00:08,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:08,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125265346] [2023-11-21 21:00:08,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125265346] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:00:08,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91207713] [2023-11-21 21:00:08,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:08,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:08,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:08,006 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:00:08,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 21:00:08,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:08,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 21:00:08,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:00:08,393 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2023-11-21 21:00:08,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:00:08,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-21 21:00:08,475 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-21 21:00:08,476 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 [2023-11-21 21:00:08,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:08,502 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:00:08,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91207713] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:08,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 21:00:08,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2023-11-21 21:00:08,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763717447] [2023-11-21 21:00:08,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:08,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 21:00:08,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:08,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 21:00:08,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=199, Unknown=1, NotChecked=28, Total=272 [2023-11-21 21:00:08,506 INFO L87 Difference]: Start difference. First operand 104 states and 128 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 21:00:08,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:08,730 INFO L93 Difference]: Finished difference Result 110 states and 123 transitions. [2023-11-21 21:00:08,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 21:00:08,731 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-11-21 21:00:08,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:08,732 INFO L225 Difference]: With dead ends: 110 [2023-11-21 21:00:08,732 INFO L226 Difference]: Without dead ends: 110 [2023-11-21 21:00:08,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=199, Unknown=1, NotChecked=28, Total=272 [2023-11-21 21:00:08,733 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 13 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:08,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 157 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 216 Invalid, 0 Unknown, 116 Unchecked, 0.2s Time] [2023-11-21 21:00:08,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-21 21:00:08,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2023-11-21 21:00:08,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 67 states have (on average 1.7462686567164178) internal successors, (117), 99 states have internal predecessors, (117), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:00:08,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 123 transitions. [2023-11-21 21:00:08,737 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 123 transitions. Word has length 19 [2023-11-21 21:00:08,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:08,738 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 123 transitions. [2023-11-21 21:00:08,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 21:00:08,738 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 123 transitions. [2023-11-21 21:00:08,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-21 21:00:08,739 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:08,739 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:08,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 21:00:08,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:08,961 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:08,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:08,961 INFO L85 PathProgramCache]: Analyzing trace with hash -101420063, now seen corresponding path program 1 times [2023-11-21 21:00:08,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:08,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779966005] [2023-11-21 21:00:08,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:08,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:08,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:09,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:09,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 21:00:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:09,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 21:00:09,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:09,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779966005] [2023-11-21 21:00:09,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779966005] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:09,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:09,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 21:00:09,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039240708] [2023-11-21 21:00:09,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:09,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 21:00:09,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:09,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 21:00:09,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-21 21:00:09,344 INFO L87 Difference]: Start difference. First operand 104 states and 123 transitions. Second operand has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 21:00:09,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:09,592 INFO L93 Difference]: Finished difference Result 103 states and 121 transitions. [2023-11-21 21:00:09,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 21:00:09,592 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-11-21 21:00:09,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:09,593 INFO L225 Difference]: With dead ends: 103 [2023-11-21 21:00:09,593 INFO L226 Difference]: Without dead ends: 103 [2023-11-21 21:00:09,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-21 21:00:09,594 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 7 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:09,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 254 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 21:00:09,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-21 21:00:09,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-11-21 21:00:09,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 67 states have (on average 1.7164179104477613) internal successors, (115), 98 states have internal predecessors, (115), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:00:09,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2023-11-21 21:00:09,599 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 21 [2023-11-21 21:00:09,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:09,599 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2023-11-21 21:00:09,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 21:00:09,599 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2023-11-21 21:00:09,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-21 21:00:09,600 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:09,600 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:09,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-21 21:00:09,601 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:09,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:09,601 INFO L85 PathProgramCache]: Analyzing trace with hash -101420064, now seen corresponding path program 1 times [2023-11-21 21:00:09,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:09,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386704414] [2023-11-21 21:00:09,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:09,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:09,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:09,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:09,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 21:00:09,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:09,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 21:00:09,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:09,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386704414] [2023-11-21 21:00:09,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386704414] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:09,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:09,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 21:00:09,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238846480] [2023-11-21 21:00:09,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:09,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 21:00:09,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:09,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 21:00:09,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-21 21:00:09,797 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 21:00:10,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:10,031 INFO L93 Difference]: Finished difference Result 102 states and 119 transitions. [2023-11-21 21:00:10,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 21:00:10,032 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-11-21 21:00:10,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:10,033 INFO L225 Difference]: With dead ends: 102 [2023-11-21 21:00:10,033 INFO L226 Difference]: Without dead ends: 102 [2023-11-21 21:00:10,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-21 21:00:10,034 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 9 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:10,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 228 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 21:00:10,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-21 21:00:10,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2023-11-21 21:00:10,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 67 states have (on average 1.6865671641791045) internal successors, (113), 97 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:00:10,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 119 transitions. [2023-11-21 21:00:10,038 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 119 transitions. Word has length 21 [2023-11-21 21:00:10,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:10,039 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 119 transitions. [2023-11-21 21:00:10,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 21:00:10,039 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 119 transitions. [2023-11-21 21:00:10,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-21 21:00:10,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:10,040 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] [2023-11-21 21:00:10,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-21 21:00:10,040 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:10,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:10,041 INFO L85 PathProgramCache]: Analyzing trace with hash 778166711, now seen corresponding path program 1 times [2023-11-21 21:00:10,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:10,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41596782] [2023-11-21 21:00:10,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:10,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:10,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:10,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:10,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:10,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 21:00:10,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:10,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41596782] [2023-11-21 21:00:10,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41596782] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:10,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:10,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 21:00:10,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448508195] [2023-11-21 21:00:10,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:10,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 21:00:10,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:10,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 21:00:10,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-21 21:00:10,174 INFO L87 Difference]: Start difference. First operand 102 states and 119 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:10,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:10,461 INFO L93 Difference]: Finished difference Result 135 states and 152 transitions. [2023-11-21 21:00:10,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 21:00:10,462 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-11-21 21:00:10,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:10,464 INFO L225 Difference]: With dead ends: 135 [2023-11-21 21:00:10,464 INFO L226 Difference]: Without dead ends: 135 [2023-11-21 21:00:10,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-21 21:00:10,465 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 68 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:10,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 183 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 21:00:10,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-21 21:00:10,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 111. [2023-11-21 21:00:10,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 77 states have (on average 1.7142857142857142) internal successors, (132), 106 states have internal predecessors, (132), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:00:10,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 138 transitions. [2023-11-21 21:00:10,471 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 138 transitions. Word has length 21 [2023-11-21 21:00:10,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:10,471 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 138 transitions. [2023-11-21 21:00:10,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:10,472 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 138 transitions. [2023-11-21 21:00:10,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-21 21:00:10,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:10,473 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] [2023-11-21 21:00:10,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-21 21:00:10,474 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:10,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:10,474 INFO L85 PathProgramCache]: Analyzing trace with hash 778166712, now seen corresponding path program 1 times [2023-11-21 21:00:10,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:10,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682160633] [2023-11-21 21:00:10,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:10,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:10,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:10,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:10,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:10,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:10,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682160633] [2023-11-21 21:00:10,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682160633] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:00:10,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998436012] [2023-11-21 21:00:10,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:10,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:10,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:10,765 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:00:10,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 21:00:10,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:10,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-21 21:00:10,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:00:11,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:11,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:00:11,150 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 21:00:11,150 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 19 treesize of output 23 [2023-11-21 21:00:11,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:11,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998436012] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:00:11,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 21:00:11,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 18 [2023-11-21 21:00:11,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911186981] [2023-11-21 21:00:11,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 21:00:11,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-21 21:00:11,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:11,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-21 21:00:11,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2023-11-21 21:00:11,293 INFO L87 Difference]: Start difference. First operand 111 states and 138 transitions. Second operand has 19 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 21:00:11,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:11,781 INFO L93 Difference]: Finished difference Result 120 states and 138 transitions. [2023-11-21 21:00:11,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-21 21:00:11,781 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-11-21 21:00:11,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:11,782 INFO L225 Difference]: With dead ends: 120 [2023-11-21 21:00:11,782 INFO L226 Difference]: Without dead ends: 120 [2023-11-21 21:00:11,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2023-11-21 21:00:11,783 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 202 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:11,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 322 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 21:00:11,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-11-21 21:00:11,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 107. [2023-11-21 21:00:11,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 75 states have (on average 1.6133333333333333) internal successors, (121), 102 states have internal predecessors, (121), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:00:11,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 127 transitions. [2023-11-21 21:00:11,788 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 127 transitions. Word has length 21 [2023-11-21 21:00:11,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:11,788 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 127 transitions. [2023-11-21 21:00:11,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 21:00:11,789 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 127 transitions. [2023-11-21 21:00:11,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-21 21:00:11,792 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:11,792 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:11,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 21:00:12,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:12,003 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:12,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:12,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1649303316, now seen corresponding path program 1 times [2023-11-21 21:00:12,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:12,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103921120] [2023-11-21 21:00:12,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:12,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:12,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:13,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:13,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:13,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:13,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:13,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103921120] [2023-11-21 21:00:13,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103921120] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:00:13,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109919076] [2023-11-21 21:00:13,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:13,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:13,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:13,283 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:00:13,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 21:00:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:13,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-21 21:00:13,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:00:13,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-21 21:00:13,523 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 [2023-11-21 21:00:13,534 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 [2023-11-21 21:00:13,568 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 23 treesize of output 11 [2023-11-21 21:00:13,577 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 23 treesize of output 11 [2023-11-21 21:00:13,681 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-21 21:00:13,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-21 21:00:13,764 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-21 21:00:13,764 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 [2023-11-21 21:00:13,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-21 21:00:13,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-21 21:00:13,848 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 16 treesize of output 11 [2023-11-21 21:00:13,856 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 16 treesize of output 11 [2023-11-21 21:00:13,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:00:13,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-21 21:00:13,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:00:13,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-21 21:00:13,927 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2023-11-21 21:00:13,928 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 1 case distinctions, treesize of input 27 treesize of output 17 [2023-11-21 21:00:13,953 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2023-11-21 21:00:13,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 17 [2023-11-21 21:00:14,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:14,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:00:15,843 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 21:00:15,844 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2023-11-21 21:00:15,858 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 21:00:15,859 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 70 treesize of output 66 [2023-11-21 21:00:15,873 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 28 treesize of output 24 [2023-11-21 21:00:15,881 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 50 treesize of output 42 [2023-11-21 21:00:15,985 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 21:00:15,986 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2023-11-21 21:00:16,000 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 21:00:16,001 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 140 treesize of output 130 [2023-11-21 21:00:16,017 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 25 treesize of output 21 [2023-11-21 21:00:16,025 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 28 treesize of output 20 [2023-11-21 21:00:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:18,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109919076] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:00:18,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 21:00:18,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 32 [2023-11-21 21:00:18,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862518730] [2023-11-21 21:00:18,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 21:00:18,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-21 21:00:18,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:18,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-21 21:00:18,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=887, Unknown=6, NotChecked=0, Total=992 [2023-11-21 21:00:18,244 INFO L87 Difference]: Start difference. First operand 107 states and 127 transitions. Second operand has 32 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 21:00:19,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:19,774 INFO L93 Difference]: Finished difference Result 109 states and 129 transitions. [2023-11-21 21:00:19,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 21:00:19,774 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2023-11-21 21:00:19,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:19,775 INFO L225 Difference]: With dead ends: 109 [2023-11-21 21:00:19,775 INFO L226 Difference]: Without dead ends: 109 [2023-11-21 21:00:19,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=156, Invalid=1170, Unknown=6, NotChecked=0, Total=1332 [2023-11-21 21:00:19,777 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 24 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:19,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 789 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-21 21:00:19,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-21 21:00:19,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-11-21 21:00:19,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 77 states have (on average 1.5974025974025974) internal successors, (123), 104 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:00:19,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 129 transitions. [2023-11-21 21:00:19,782 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 129 transitions. Word has length 22 [2023-11-21 21:00:19,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:19,783 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 129 transitions. [2023-11-21 21:00:19,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 21:00:19,783 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 129 transitions. [2023-11-21 21:00:19,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-21 21:00:19,784 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:19,784 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] [2023-11-21 21:00:19,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 21:00:20,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:20,003 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:20,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:20,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1646635660, now seen corresponding path program 1 times [2023-11-21 21:00:20,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:20,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345698043] [2023-11-21 21:00:20,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:20,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:20,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:20,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 21:00:20,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:20,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345698043] [2023-11-21 21:00:20,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345698043] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:20,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:20,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 21:00:20,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051604804] [2023-11-21 21:00:20,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:20,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 21:00:20,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:20,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 21:00:20,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-21 21:00:20,321 INFO L87 Difference]: Start difference. First operand 109 states and 129 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:20,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:20,681 INFO L93 Difference]: Finished difference Result 148 states and 167 transitions. [2023-11-21 21:00:20,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 21:00:20,682 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-11-21 21:00:20,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:20,683 INFO L225 Difference]: With dead ends: 148 [2023-11-21 21:00:20,683 INFO L226 Difference]: Without dead ends: 148 [2023-11-21 21:00:20,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-11-21 21:00:20,684 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 83 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:20,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 246 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 21:00:20,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-21 21:00:20,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 112. [2023-11-21 21:00:20,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 80 states have (on average 1.5875) internal successors, (127), 107 states have internal predecessors, (127), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:00:20,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2023-11-21 21:00:20,691 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 22 [2023-11-21 21:00:20,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:20,692 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2023-11-21 21:00:20,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:20,693 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2023-11-21 21:00:20,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-21 21:00:20,693 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:20,694 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] [2023-11-21 21:00:20,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-21 21:00:20,694 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr45ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:20,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:20,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1646614229, now seen corresponding path program 1 times [2023-11-21 21:00:20,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:20,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176480500] [2023-11-21 21:00:20,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:20,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:20,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:20,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:20,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 21:00:20,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:20,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176480500] [2023-11-21 21:00:20,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176480500] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:20,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:20,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-21 21:00:20,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216288894] [2023-11-21 21:00:20,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:20,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 21:00:20,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:20,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 21:00:20,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-21 21:00:20,906 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:21,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:21,225 INFO L93 Difference]: Finished difference Result 114 states and 129 transitions. [2023-11-21 21:00:21,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 21:00:21,228 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-11-21 21:00:21,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:21,230 INFO L225 Difference]: With dead ends: 114 [2023-11-21 21:00:21,230 INFO L226 Difference]: Without dead ends: 114 [2023-11-21 21:00:21,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-21 21:00:21,231 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 84 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:21,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 275 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 21:00:21,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-21 21:00:21,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2023-11-21 21:00:21,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 78 states have (on average 1.5384615384615385) internal successors, (120), 105 states have internal predecessors, (120), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:00:21,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2023-11-21 21:00:21,238 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 22 [2023-11-21 21:00:21,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:21,239 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2023-11-21 21:00:21,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:21,239 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2023-11-21 21:00:21,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-21 21:00:21,240 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:21,240 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:21,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-21 21:00:21,241 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:21,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:21,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1319685150, now seen corresponding path program 1 times [2023-11-21 21:00:21,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:21,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591494992] [2023-11-21 21:00:21,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:21,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:21,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:21,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:21,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:21,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 21:00:21,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 21:00:21,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:21,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591494992] [2023-11-21 21:00:21,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591494992] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:21,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:21,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-21 21:00:21,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847938994] [2023-11-21 21:00:21,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:21,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-21 21:00:21,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:21,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-21 21:00:21,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-11-21 21:00:21,717 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 12 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 21:00:22,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:22,257 INFO L93 Difference]: Finished difference Result 111 states and 125 transitions. [2023-11-21 21:00:22,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 21:00:22,258 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-11-21 21:00:22,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:22,259 INFO L225 Difference]: With dead ends: 111 [2023-11-21 21:00:22,259 INFO L226 Difference]: Without dead ends: 111 [2023-11-21 21:00:22,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-11-21 21:00:22,260 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 28 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:22,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 249 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 21:00:22,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-21 21:00:22,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2023-11-21 21:00:22,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 78 states have (on average 1.5256410256410255) internal successors, (119), 105 states have internal predecessors, (119), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:00:22,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2023-11-21 21:00:22,265 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 23 [2023-11-21 21:00:22,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:22,266 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2023-11-21 21:00:22,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 21:00:22,266 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2023-11-21 21:00:22,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-21 21:00:22,267 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:22,267 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:22,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-21 21:00:22,267 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:22,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:22,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1319685151, now seen corresponding path program 1 times [2023-11-21 21:00:22,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:22,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347927901] [2023-11-21 21:00:22,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:22,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:22,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:22,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 21:00:22,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:22,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 21:00:22,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:22,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347927901] [2023-11-21 21:00:22,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347927901] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:22,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:22,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-21 21:00:22,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084437382] [2023-11-21 21:00:22,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:22,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-21 21:00:22,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:22,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-21 21:00:22,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-21 21:00:22,920 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 21:00:23,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:23,570 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2023-11-21 21:00:23,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 21:00:23,571 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-11-21 21:00:23,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:23,572 INFO L225 Difference]: With dead ends: 110 [2023-11-21 21:00:23,572 INFO L226 Difference]: Without dead ends: 110 [2023-11-21 21:00:23,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-11-21 21:00:23,573 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 22 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:23,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 303 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 21:00:23,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-21 21:00:23,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2023-11-21 21:00:23,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 78 states have (on average 1.5128205128205128) internal successors, (118), 105 states have internal predecessors, (118), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:00:23,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 124 transitions. [2023-11-21 21:00:23,579 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 124 transitions. Word has length 23 [2023-11-21 21:00:23,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:23,580 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 124 transitions. [2023-11-21 21:00:23,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 21:00:23,580 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 124 transitions. [2023-11-21 21:00:23,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-21 21:00:23,581 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:23,581 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] [2023-11-21 21:00:23,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-21 21:00:23,582 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:23,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:23,582 INFO L85 PathProgramCache]: Analyzing trace with hash 493902231, now seen corresponding path program 1 times [2023-11-21 21:00:23,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:23,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551956891] [2023-11-21 21:00:23,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:23,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:23,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:23,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 21:00:23,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:23,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551956891] [2023-11-21 21:00:23,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551956891] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:23,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:23,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 21:00:23,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554340396] [2023-11-21 21:00:23,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:23,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 21:00:23,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:23,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 21:00:23,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-21 21:00:23,937 INFO L87 Difference]: Start difference. First operand 110 states and 124 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:24,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:24,437 INFO L93 Difference]: Finished difference Result 141 states and 153 transitions. [2023-11-21 21:00:24,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 21:00:24,438 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-11-21 21:00:24,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:24,439 INFO L225 Difference]: With dead ends: 141 [2023-11-21 21:00:24,439 INFO L226 Difference]: Without dead ends: 141 [2023-11-21 21:00:24,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-11-21 21:00:24,440 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 73 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:24,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 203 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 21:00:24,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-11-21 21:00:24,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 111. [2023-11-21 21:00:24,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 79 states have (on average 1.5063291139240507) internal successors, (119), 106 states have internal predecessors, (119), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:00:24,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2023-11-21 21:00:24,445 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 23 [2023-11-21 21:00:24,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:24,445 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2023-11-21 21:00:24,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:24,446 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2023-11-21 21:00:24,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-21 21:00:24,446 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:24,446 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:24,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-21 21:00:24,447 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:24,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:24,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1868899882, now seen corresponding path program 1 times [2023-11-21 21:00:24,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:24,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043154525] [2023-11-21 21:00:24,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:24,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:24,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 21:00:24,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:24,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043154525] [2023-11-21 21:00:24,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043154525] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:24,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:24,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-21 21:00:24,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370544541] [2023-11-21 21:00:24,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:24,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 21:00:24,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:24,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 21:00:24,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-21 21:00:24,947 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:25,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:25,391 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2023-11-21 21:00:25,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 21:00:25,392 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-11-21 21:00:25,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:25,393 INFO L225 Difference]: With dead ends: 112 [2023-11-21 21:00:25,393 INFO L226 Difference]: Without dead ends: 112 [2023-11-21 21:00:25,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-11-21 21:00:25,395 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 22 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:25,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 207 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 21:00:25,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-11-21 21:00:25,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2023-11-21 21:00:25,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 80 states have (on average 1.5) internal successors, (120), 107 states have internal predecessors, (120), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:00:25,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2023-11-21 21:00:25,401 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 24 [2023-11-21 21:00:25,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:25,401 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2023-11-21 21:00:25,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:25,401 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2023-11-21 21:00:25,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-21 21:00:25,402 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:25,402 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:25,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-21 21:00:25,403 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:25,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:25,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1202176680, now seen corresponding path program 1 times [2023-11-21 21:00:25,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:25,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672234396] [2023-11-21 21:00:25,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:25,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:25,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:25,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:25,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:25,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 21:00:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:25,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 21:00:25,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:25,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672234396] [2023-11-21 21:00:25,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672234396] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:25,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:25,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-21 21:00:25,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221503939] [2023-11-21 21:00:25,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:25,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-21 21:00:25,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:25,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-21 21:00:25,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-11-21 21:00:25,927 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 21:00:26,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:26,394 INFO L93 Difference]: Finished difference Result 113 states and 125 transitions. [2023-11-21 21:00:26,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 21:00:26,395 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-11-21 21:00:26,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:26,396 INFO L225 Difference]: With dead ends: 113 [2023-11-21 21:00:26,396 INFO L226 Difference]: Without dead ends: 113 [2023-11-21 21:00:26,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-11-21 21:00:26,397 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 29 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:26,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 374 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 21:00:26,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-21 21:00:26,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2023-11-21 21:00:26,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 80 states have (on average 1.4875) internal successors, (119), 107 states have internal predecessors, (119), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:00:26,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 125 transitions. [2023-11-21 21:00:26,401 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 125 transitions. Word has length 25 [2023-11-21 21:00:26,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:26,402 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 125 transitions. [2023-11-21 21:00:26,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 21:00:26,402 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 125 transitions. [2023-11-21 21:00:26,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-21 21:00:26,402 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:26,402 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:26,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-21 21:00:26,403 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:26,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:26,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1202176681, now seen corresponding path program 1 times [2023-11-21 21:00:26,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:26,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583570762] [2023-11-21 21:00:26,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:26,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:26,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:27,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:27,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:27,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 21:00:27,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 21:00:27,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:27,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583570762] [2023-11-21 21:00:27,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583570762] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:27,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:27,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-21 21:00:27,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021272024] [2023-11-21 21:00:27,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:27,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-21 21:00:27,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:27,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-21 21:00:27,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-21 21:00:27,166 INFO L87 Difference]: Start difference. First operand 112 states and 125 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 21:00:27,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:27,615 INFO L93 Difference]: Finished difference Result 112 states and 124 transitions. [2023-11-21 21:00:27,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 21:00:27,615 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-11-21 21:00:27,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:27,616 INFO L225 Difference]: With dead ends: 112 [2023-11-21 21:00:27,616 INFO L226 Difference]: Without dead ends: 112 [2023-11-21 21:00:27,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-11-21 21:00:27,617 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 25 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:27,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 241 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 21:00:27,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-11-21 21:00:27,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2023-11-21 21:00:27,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 80 states have (on average 1.475) internal successors, (118), 107 states have internal predecessors, (118), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:00:27,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 124 transitions. [2023-11-21 21:00:27,621 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 124 transitions. Word has length 25 [2023-11-21 21:00:27,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:27,621 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 124 transitions. [2023-11-21 21:00:27,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 21:00:27,622 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 124 transitions. [2023-11-21 21:00:27,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-21 21:00:27,622 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:27,622 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:27,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-11-21 21:00:27,622 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:27,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:27,623 INFO L85 PathProgramCache]: Analyzing trace with hash -2101321350, now seen corresponding path program 1 times [2023-11-21 21:00:27,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:27,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539048233] [2023-11-21 21:00:27,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:27,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:27,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:28,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:28,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 21:00:28,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:28,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539048233] [2023-11-21 21:00:28,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539048233] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:28,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:28,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-21 21:00:28,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683539089] [2023-11-21 21:00:28,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:28,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-21 21:00:28,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:28,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-21 21:00:28,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-11-21 21:00:28,128 INFO L87 Difference]: Start difference. First operand 112 states and 124 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:28,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:28,772 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2023-11-21 21:00:28,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-21 21:00:28,776 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-11-21 21:00:28,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:28,777 INFO L225 Difference]: With dead ends: 119 [2023-11-21 21:00:28,777 INFO L226 Difference]: Without dead ends: 119 [2023-11-21 21:00:28,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2023-11-21 21:00:28,778 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 43 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:28,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 298 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 21:00:28,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-21 21:00:28,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 113. [2023-11-21 21:00:28,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 81 states have (on average 1.4691358024691359) internal successors, (119), 108 states have internal predecessors, (119), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:00:28,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2023-11-21 21:00:28,783 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 25 [2023-11-21 21:00:28,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:28,783 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2023-11-21 21:00:28,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:28,783 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2023-11-21 21:00:28,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-21 21:00:28,783 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:28,784 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] [2023-11-21 21:00:28,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-11-21 21:00:28,788 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:28,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:28,789 INFO L85 PathProgramCache]: Analyzing trace with hash -716452326, now seen corresponding path program 1 times [2023-11-21 21:00:28,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:28,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53698653] [2023-11-21 21:00:28,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:28,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:29,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:29,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 21:00:29,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:29,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53698653] [2023-11-21 21:00:29,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53698653] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:29,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:29,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-21 21:00:29,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036239407] [2023-11-21 21:00:29,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:29,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-21 21:00:29,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:29,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-21 21:00:29,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-11-21 21:00:29,244 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand has 12 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:29,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:29,681 INFO L93 Difference]: Finished difference Result 136 states and 148 transitions. [2023-11-21 21:00:29,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-21 21:00:29,682 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-11-21 21:00:29,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:29,683 INFO L225 Difference]: With dead ends: 136 [2023-11-21 21:00:29,683 INFO L226 Difference]: Without dead ends: 136 [2023-11-21 21:00:29,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-11-21 21:00:29,684 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 73 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:29,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 354 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 21:00:29,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-11-21 21:00:29,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 114. [2023-11-21 21:00:29,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 82 states have (on average 1.4634146341463414) internal successors, (120), 109 states have internal predecessors, (120), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:00:29,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2023-11-21 21:00:29,690 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 26 [2023-11-21 21:00:29,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:29,690 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2023-11-21 21:00:29,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:29,691 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2023-11-21 21:00:29,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-21 21:00:29,691 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:29,691 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:29,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-11-21 21:00:29,692 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:29,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:29,692 INFO L85 PathProgramCache]: Analyzing trace with hash -735185478, now seen corresponding path program 1 times [2023-11-21 21:00:29,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:29,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042338737] [2023-11-21 21:00:29,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:29,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:29,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:30,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:30,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 21:00:30,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:30,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042338737] [2023-11-21 21:00:30,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042338737] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:30,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:30,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-21 21:00:30,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142794524] [2023-11-21 21:00:30,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:30,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-21 21:00:30,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:30,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-21 21:00:30,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-11-21 21:00:30,154 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand has 12 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:30,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:30,643 INFO L93 Difference]: Finished difference Result 135 states and 147 transitions. [2023-11-21 21:00:30,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-21 21:00:30,643 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-11-21 21:00:30,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:30,644 INFO L225 Difference]: With dead ends: 135 [2023-11-21 21:00:30,644 INFO L226 Difference]: Without dead ends: 135 [2023-11-21 21:00:30,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-11-21 21:00:30,645 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 67 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:30,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 315 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 21:00:30,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-21 21:00:30,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 115. [2023-11-21 21:00:30,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 83 states have (on average 1.4578313253012047) internal successors, (121), 110 states have internal predecessors, (121), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:00:30,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2023-11-21 21:00:30,650 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 27 [2023-11-21 21:00:30,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:30,650 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2023-11-21 21:00:30,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:30,650 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2023-11-21 21:00:30,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-21 21:00:30,651 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:30,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:30,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-11-21 21:00:30,651 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:30,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:30,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1315913188, now seen corresponding path program 1 times [2023-11-21 21:00:30,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:30,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208828873] [2023-11-21 21:00:30,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:30,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:31,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:31,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:31,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 21:00:31,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:31,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208828873] [2023-11-21 21:00:31,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208828873] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:31,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:31,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-21 21:00:31,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974796234] [2023-11-21 21:00:31,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:31,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-21 21:00:31,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:31,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-21 21:00:31,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-11-21 21:00:31,331 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand has 15 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:31,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:31,882 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2023-11-21 21:00:31,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-21 21:00:31,883 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-11-21 21:00:31,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:31,883 INFO L225 Difference]: With dead ends: 116 [2023-11-21 21:00:31,884 INFO L226 Difference]: Without dead ends: 116 [2023-11-21 21:00:31,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-11-21 21:00:31,885 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 35 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:31,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 333 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 21:00:31,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-11-21 21:00:31,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2023-11-21 21:00:31,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 84 states have (on average 1.4523809523809523) internal successors, (122), 111 states have internal predecessors, (122), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:00:31,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 128 transitions. [2023-11-21 21:00:31,889 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 128 transitions. Word has length 28 [2023-11-21 21:00:31,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:31,889 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 128 transitions. [2023-11-21 21:00:31,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:31,889 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 128 transitions. [2023-11-21 21:00:31,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-21 21:00:31,890 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:31,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:31,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-11-21 21:00:31,890 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:31,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:31,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1872183489, now seen corresponding path program 1 times [2023-11-21 21:00:31,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:31,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641322874] [2023-11-21 21:00:31,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:31,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:31,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:32,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 21:00:32,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:32,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641322874] [2023-11-21 21:00:32,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641322874] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:32,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:32,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-21 21:00:32,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878745039] [2023-11-21 21:00:32,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:32,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-21 21:00:32,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:32,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-21 21:00:32,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-11-21 21:00:32,499 INFO L87 Difference]: Start difference. First operand 116 states and 128 transitions. Second operand has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:33,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:33,072 INFO L93 Difference]: Finished difference Result 133 states and 145 transitions. [2023-11-21 21:00:33,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-21 21:00:33,073 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2023-11-21 21:00:33,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:33,074 INFO L225 Difference]: With dead ends: 133 [2023-11-21 21:00:33,074 INFO L226 Difference]: Without dead ends: 133 [2023-11-21 21:00:33,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-11-21 21:00:33,075 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 84 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:33,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 341 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 21:00:33,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-21 21:00:33,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 118. [2023-11-21 21:00:33,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 86 states have (on average 1.441860465116279) internal successors, (124), 113 states have internal predecessors, (124), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:00:33,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 130 transitions. [2023-11-21 21:00:33,079 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 130 transitions. Word has length 30 [2023-11-21 21:00:33,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:33,080 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 130 transitions. [2023-11-21 21:00:33,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:33,080 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 130 transitions. [2023-11-21 21:00:33,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-21 21:00:33,080 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:33,081 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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] [2023-11-21 21:00:33,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-11-21 21:00:33,081 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:33,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:33,082 INFO L85 PathProgramCache]: Analyzing trace with hash 857299597, now seen corresponding path program 1 times [2023-11-21 21:00:33,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:33,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585754188] [2023-11-21 21:00:33,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:33,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:33,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:33,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:33,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 21:00:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 21:00:33,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:33,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585754188] [2023-11-21 21:00:33,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585754188] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:00:33,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309708342] [2023-11-21 21:00:33,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:33,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:33,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:33,456 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:00:33,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 21:00:33,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:33,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-21 21:00:33,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:00:33,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 21:00:33,914 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:00:34,016 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 21:00:34,017 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 19 treesize of output 23 [2023-11-21 21:00:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 21:00:34,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309708342] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:00:34,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 21:00:34,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 17 [2023-11-21 21:00:34,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453668574] [2023-11-21 21:00:34,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 21:00:34,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-21 21:00:34,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:34,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-21 21:00:34,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-11-21 21:00:34,152 INFO L87 Difference]: Start difference. First operand 118 states and 130 transitions. Second operand has 18 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-21 21:00:34,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:34,630 INFO L93 Difference]: Finished difference Result 122 states and 131 transitions. [2023-11-21 21:00:34,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-21 21:00:34,631 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 31 [2023-11-21 21:00:34,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:34,632 INFO L225 Difference]: With dead ends: 122 [2023-11-21 21:00:34,632 INFO L226 Difference]: Without dead ends: 122 [2023-11-21 21:00:34,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-11-21 21:00:34,633 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 18 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:34,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 530 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 21:00:34,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-21 21:00:34,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 118. [2023-11-21 21:00:34,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 86 states have (on average 1.430232558139535) internal successors, (123), 113 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:00:34,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 129 transitions. [2023-11-21 21:00:34,637 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 129 transitions. Word has length 31 [2023-11-21 21:00:34,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:34,637 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 129 transitions. [2023-11-21 21:00:34,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-21 21:00:34,638 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 129 transitions. [2023-11-21 21:00:34,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-21 21:00:34,638 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:34,638 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:34,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 21:00:34,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:34,857 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:34,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:34,858 INFO L85 PathProgramCache]: Analyzing trace with hash 806483757, now seen corresponding path program 1 times [2023-11-21 21:00:34,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:34,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299341817] [2023-11-21 21:00:34,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:34,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:35,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:35,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:35,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 21:00:35,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:35,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 21:00:35,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:35,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299341817] [2023-11-21 21:00:35,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299341817] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:00:35,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913657313] [2023-11-21 21:00:35,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:35,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:35,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:35,837 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:00:35,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 21:00:36,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:36,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-21 21:00:36,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:00:36,359 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-21 21:00:36,360 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 [2023-11-21 21:00:36,382 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-21 21:00:36,382 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 [2023-11-21 21:00:36,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-21 21:00:36,488 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 10 treesize of output 4 [2023-11-21 21:00:36,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:36,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:00:36,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913657313] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:00:36,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 21:00:36,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2023-11-21 21:00:36,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378811557] [2023-11-21 21:00:36,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 21:00:36,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-21 21:00:36,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:36,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-21 21:00:36,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2023-11-21 21:00:36,911 INFO L87 Difference]: Start difference. First operand 118 states and 129 transitions. Second operand has 26 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-21 21:00:37,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:37,674 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2023-11-21 21:00:37,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 21:00:37,674 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2023-11-21 21:00:37,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:37,675 INFO L225 Difference]: With dead ends: 116 [2023-11-21 21:00:37,675 INFO L226 Difference]: Without dead ends: 116 [2023-11-21 21:00:37,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2023-11-21 21:00:37,677 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 79 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:37,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 422 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-21 21:00:37,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-11-21 21:00:37,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2023-11-21 21:00:37,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 86 states have (on average 1.3953488372093024) internal successors, (120), 111 states have internal predecessors, (120), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:00:37,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2023-11-21 21:00:37,681 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 32 [2023-11-21 21:00:37,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:37,682 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2023-11-21 21:00:37,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-21 21:00:37,682 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2023-11-21 21:00:37,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-21 21:00:37,683 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:37,683 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:37,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 21:00:37,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:37,900 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:37,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:37,901 INFO L85 PathProgramCache]: Analyzing trace with hash 422999232, now seen corresponding path program 1 times [2023-11-21 21:00:37,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:37,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919313356] [2023-11-21 21:00:37,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:37,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:37,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:38,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:38,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:38,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 21:00:38,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:38,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919313356] [2023-11-21 21:00:38,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919313356] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:38,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:38,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 21:00:38,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35855685] [2023-11-21 21:00:38,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:38,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 21:00:38,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:38,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 21:00:38,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-21 21:00:38,110 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand has 9 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:38,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:38,348 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2023-11-21 21:00:38,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 21:00:38,349 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2023-11-21 21:00:38,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:38,350 INFO L225 Difference]: With dead ends: 118 [2023-11-21 21:00:38,350 INFO L226 Difference]: Without dead ends: 118 [2023-11-21 21:00:38,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-21 21:00:38,351 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 66 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:38,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 226 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 21:00:38,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-11-21 21:00:38,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2023-11-21 21:00:38,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 87 states have (on average 1.3908045977011494) internal successors, (121), 112 states have internal predecessors, (121), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:00:38,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 127 transitions. [2023-11-21 21:00:38,355 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 127 transitions. Word has length 32 [2023-11-21 21:00:38,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:38,356 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 127 transitions. [2023-11-21 21:00:38,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 21:00:38,356 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 127 transitions. [2023-11-21 21:00:38,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-21 21:00:38,357 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:38,357 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:38,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-11-21 21:00:38,357 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:38,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:38,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1004834963, now seen corresponding path program 1 times [2023-11-21 21:00:38,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:38,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078700161] [2023-11-21 21:00:38,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:38,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:39,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:39,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:39,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 21:00:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:39,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-21 21:00:39,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 21:00:39,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:39,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078700161] [2023-11-21 21:00:39,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078700161] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:00:39,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574952044] [2023-11-21 21:00:39,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:39,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:39,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:39,512 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:00:39,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 21:00:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:39,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-21 21:00:39,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:00:39,897 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-21 21:00:39,898 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 [2023-11-21 21:00:39,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-21 21:00:40,007 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-21 21:00:40,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2023-11-21 21:00:40,094 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-21 21:00:40,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2023-11-21 21:00:40,173 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-21 21:00:40,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2023-11-21 21:00:40,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2023-11-21 21:00:40,207 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2023-11-21 21:00:40,235 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-21 21:00:40,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-21 21:00:40,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 3 not checked. [2023-11-21 21:00:40,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:00:40,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574952044] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:00:40,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 21:00:40,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2023-11-21 21:00:40,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099527700] [2023-11-21 21:00:40,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 21:00:40,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-21 21:00:40,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:40,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-21 21:00:40,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=578, Unknown=1, NotChecked=48, Total=702 [2023-11-21 21:00:40,314 INFO L87 Difference]: Start difference. First operand 117 states and 127 transitions. Second operand has 26 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-21 21:00:41,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:00:41,167 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2023-11-21 21:00:41,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-21 21:00:41,167 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 34 [2023-11-21 21:00:41,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:00:41,168 INFO L225 Difference]: With dead ends: 114 [2023-11-21 21:00:41,168 INFO L226 Difference]: Without dead ends: 114 [2023-11-21 21:00:41,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=220, Invalid=1343, Unknown=1, NotChecked=76, Total=1640 [2023-11-21 21:00:41,170 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 54 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 21:00:41,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 437 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 603 Invalid, 0 Unknown, 79 Unchecked, 0.5s Time] [2023-11-21 21:00:41,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-21 21:00:41,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2023-11-21 21:00:41,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 87 states have (on average 1.3563218390804597) internal successors, (118), 109 states have internal predecessors, (118), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 21:00:41,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2023-11-21 21:00:41,196 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 34 [2023-11-21 21:00:41,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:00:41,197 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2023-11-21 21:00:41,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-21 21:00:41,197 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2023-11-21 21:00:41,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-21 21:00:41,198 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:00:41,198 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:41,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 21:00:41,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d034b-314d-47c6-8fa9-67f360fa8681/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:00:41,413 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-21 21:00:41,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:41,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1004834962, now seen corresponding path program 1 times [2023-11-21 21:00:41,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:41,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027005456] [2023-11-21 21:00:41,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:41,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:42,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:00:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:42,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 21:00:42,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:42,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-21 21:00:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat