./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/dll-optional-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/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_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-optional-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/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 32bit --witnessprinter.graph.data.programhash 1c592bb1d39faa1e5f3d20603a8bfbb8fe6cff4de59ea35fafbddd50b8917b41 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:07:26,610 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:07:26,720 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-21 22:07:26,727 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:07:26,728 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:07:26,769 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:07:26,772 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:07:26,773 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:07:26,774 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:07:26,779 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:07:26,780 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:07:26,781 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:07:26,781 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:07:26,783 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:07:26,783 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:07:26,784 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:07:26,784 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:07:26,785 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:07:26,785 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:07:26,786 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:07:26,786 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:07:26,787 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:07:26,787 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:07:26,788 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:07:26,788 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:07:26,789 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:07:26,789 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:07:26,790 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:07:26,790 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:07:26,791 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:07:26,792 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:07:26,792 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:07:26,793 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:07:26,793 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:07:26,793 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:07:26,793 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:07:26,793 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:07:26,793 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:07:26,793 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:07:26,794 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_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c592bb1d39faa1e5f3d20603a8bfbb8fe6cff4de59ea35fafbddd50b8917b41 [2023-11-21 22:07:27,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:07:27,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:07:27,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:07:27,164 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:07:27,164 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:07:27,166 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/forester-heap/dll-optional-1.i [2023-11-21 22:07:30,379 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:07:30,709 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:07:30,710 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/sv-benchmarks/c/forester-heap/dll-optional-1.i [2023-11-21 22:07:30,726 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/bin/uautomizer-verify-bycVGegfSx/data/104a58f32/284ee1ffc0a548729b97180067d3a97e/FLAG592fd6fa8 [2023-11-21 22:07:30,743 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/bin/uautomizer-verify-bycVGegfSx/data/104a58f32/284ee1ffc0a548729b97180067d3a97e [2023-11-21 22:07:30,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:07:30,752 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:07:30,756 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:07:30,757 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:07:30,763 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:07:30,771 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:07:30" (1/1) ... [2023-11-21 22:07:30,772 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@131b5725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:30, skipping insertion in model container [2023-11-21 22:07:30,772 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:07:30" (1/1) ... [2023-11-21 22:07:30,838 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:07:31,208 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:07:31,224 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:07:31,306 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:07:31,348 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:07:31,348 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:31 WrapperNode [2023-11-21 22:07:31,349 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:07:31,350 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:07:31,350 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:07:31,351 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:07:31,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:31" (1/1) ... [2023-11-21 22:07:31,384 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:31" (1/1) ... [2023-11-21 22:07:31,420 INFO L138 Inliner]: procedures = 119, calls = 45, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 147 [2023-11-21 22:07:31,422 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:07:31,423 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:07:31,423 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:07:31,424 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:07:31,441 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:31" (1/1) ... [2023-11-21 22:07:31,441 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:31" (1/1) ... [2023-11-21 22:07:31,446 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:31" (1/1) ... [2023-11-21 22:07:31,446 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:31" (1/1) ... [2023-11-21 22:07:31,457 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:31" (1/1) ... [2023-11-21 22:07:31,461 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:31" (1/1) ... [2023-11-21 22:07:31,463 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:31" (1/1) ... [2023-11-21 22:07:31,465 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:31" (1/1) ... [2023-11-21 22:07:31,469 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:07:31,470 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:07:31,470 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:07:31,470 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:07:31,471 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:31" (1/1) ... [2023-11-21 22:07:31,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:07:31,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:07:31,507 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:07:31,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:07:31,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 22:07:31,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 22:07:31,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 22:07:31,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:07:31,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 22:07:31,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 22:07:31,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:07:31,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 22:07:31,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:07:31,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:07:31,718 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:07:31,721 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:07:32,362 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:07:32,459 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:07:32,459 INFO L308 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-21 22:07:32,461 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:07:32 BoogieIcfgContainer [2023-11-21 22:07:32,462 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:07:32,464 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:07:32,464 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:07:32,468 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:07:32,469 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:07:30" (1/3) ... [2023-11-21 22:07:32,470 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16025785 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:07:32, skipping insertion in model container [2023-11-21 22:07:32,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:31" (2/3) ... [2023-11-21 22:07:32,471 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16025785 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:07:32, skipping insertion in model container [2023-11-21 22:07:32,471 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:07:32" (3/3) ... [2023-11-21 22:07:32,473 INFO L112 eAbstractionObserver]: Analyzing ICFG dll-optional-1.i [2023-11-21 22:07:32,495 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:07:32,495 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 72 error locations. [2023-11-21 22:07:32,550 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:07:32,559 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;@64e8c8e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:07:32,559 INFO L358 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2023-11-21 22:07:32,564 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 61 states have (on average 2.442622950819672) internal successors, (149), 133 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:32,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-21 22:07:32,571 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:32,572 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-21 22:07:32,573 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:07:32,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:32,580 INFO L85 PathProgramCache]: Analyzing trace with hash 9056, now seen corresponding path program 1 times [2023-11-21 22:07:32,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:32,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275036547] [2023-11-21 22:07:32,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:32,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:32,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:32,843 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 22:07:32,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:32,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275036547] [2023-11-21 22:07:32,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275036547] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:32,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:32,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:07:32,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122521226] [2023-11-21 22:07:32,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:32,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:07:32,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:32,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:07:32,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:07:32,917 INFO L87 Difference]: Start difference. First operand has 134 states, 61 states have (on average 2.442622950819672) internal successors, (149), 133 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:33,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:33,150 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2023-11-21 22:07:33,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:07:33,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-21 22:07:33,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:33,171 INFO L225 Difference]: With dead ends: 131 [2023-11-21 22:07:33,171 INFO L226 Difference]: Without dead ends: 130 [2023-11-21 22:07:33,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 22:07:33,182 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 118 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:33,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 62 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:07:33,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-11-21 22:07:33,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2023-11-21 22:07:33,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 63 states have (on average 2.1746031746031744) internal successors, (137), 124 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:33,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 137 transitions. [2023-11-21 22:07:33,250 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 137 transitions. Word has length 2 [2023-11-21 22:07:33,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:33,252 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 137 transitions. [2023-11-21 22:07:33,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:33,254 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 137 transitions. [2023-11-21 22:07:33,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-21 22:07:33,256 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:33,257 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-21 22:07:33,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:07:33,258 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:07:33,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:33,260 INFO L85 PathProgramCache]: Analyzing trace with hash 9057, now seen corresponding path program 1 times [2023-11-21 22:07:33,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:33,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062762523] [2023-11-21 22:07:33,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:33,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:33,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:33,429 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 22:07:33,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:33,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062762523] [2023-11-21 22:07:33,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062762523] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:33,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:33,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:07:33,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347710674] [2023-11-21 22:07:33,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:33,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:07:33,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:33,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:07:33,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:07:33,435 INFO L87 Difference]: Start difference. First operand 125 states and 137 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:33,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:33,611 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2023-11-21 22:07:33,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:07:33,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-21 22:07:33,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:33,613 INFO L225 Difference]: With dead ends: 119 [2023-11-21 22:07:33,613 INFO L226 Difference]: Without dead ends: 119 [2023-11-21 22:07:33,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 22:07:33,616 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 96 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:33,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 77 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:07:33,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-21 22:07:33,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2023-11-21 22:07:33,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 115 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:33,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 128 transitions. [2023-11-21 22:07:33,629 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 128 transitions. Word has length 2 [2023-11-21 22:07:33,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:33,629 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 128 transitions. [2023-11-21 22:07:33,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:33,630 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 128 transitions. [2023-11-21 22:07:33,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 22:07:33,631 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:33,631 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:07:33,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:07:33,633 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:07:33,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:33,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1009143368, now seen corresponding path program 1 times [2023-11-21 22:07:33,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:33,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037487401] [2023-11-21 22:07:33,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:33,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:33,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:34,064 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 22:07:34,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:34,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037487401] [2023-11-21 22:07:34,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037487401] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:34,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:34,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:07:34,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244924330] [2023-11-21 22:07:34,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:34,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:07:34,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:34,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:07:34,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:07:34,077 INFO L87 Difference]: Start difference. First operand 116 states and 128 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:34,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:34,435 INFO L93 Difference]: Finished difference Result 154 states and 171 transitions. [2023-11-21 22:07:34,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:07:34,436 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-21 22:07:34,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:34,443 INFO L225 Difference]: With dead ends: 154 [2023-11-21 22:07:34,443 INFO L226 Difference]: Without dead ends: 154 [2023-11-21 22:07:34,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 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 22:07:34,454 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 44 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:34,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 252 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:07:34,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-21 22:07:34,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 115. [2023-11-21 22:07:34,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 63 states have (on average 2.015873015873016) internal successors, (127), 114 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:34,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2023-11-21 22:07:34,482 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 8 [2023-11-21 22:07:34,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:34,484 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2023-11-21 22:07:34,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:34,486 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2023-11-21 22:07:34,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 22:07:34,487 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:34,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:07:34,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:07:34,488 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:07:34,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:34,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1009143367, now seen corresponding path program 1 times [2023-11-21 22:07:34,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:34,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950135419] [2023-11-21 22:07:34,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:34,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:34,919 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 22:07:34,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:34,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950135419] [2023-11-21 22:07:34,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950135419] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:34,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:34,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:07:34,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165291859] [2023-11-21 22:07:34,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:34,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:07:34,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:34,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:07:34,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:07:34,923 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:35,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:35,264 INFO L93 Difference]: Finished difference Result 114 states and 126 transitions. [2023-11-21 22:07:35,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:07:35,265 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-21 22:07:35,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:35,266 INFO L225 Difference]: With dead ends: 114 [2023-11-21 22:07:35,266 INFO L226 Difference]: Without dead ends: 114 [2023-11-21 22:07:35,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 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 22:07:35,269 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 1 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:35,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 279 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:07:35,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-21 22:07:35,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2023-11-21 22:07:35,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 63 states have (on average 2.0) internal successors, (126), 113 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:35,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2023-11-21 22:07:35,281 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 8 [2023-11-21 22:07:35,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:35,281 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2023-11-21 22:07:35,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:35,282 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2023-11-21 22:07:35,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-21 22:07:35,283 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:35,283 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:07:35,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 22:07:35,284 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:07:35,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:35,285 INFO L85 PathProgramCache]: Analyzing trace with hash -273737594, now seen corresponding path program 1 times [2023-11-21 22:07:35,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:35,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144976901] [2023-11-21 22:07:35,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:35,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:35,420 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 22:07:35,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:35,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144976901] [2023-11-21 22:07:35,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144976901] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:35,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:35,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:07:35,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522878609] [2023-11-21 22:07:35,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:35,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:07:35,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:35,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:07:35,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:07:35,424 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:35,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:35,663 INFO L93 Difference]: Finished difference Result 112 states and 123 transitions. [2023-11-21 22:07:35,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:07:35,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-21 22:07:35,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:35,665 INFO L225 Difference]: With dead ends: 112 [2023-11-21 22:07:35,665 INFO L226 Difference]: Without dead ends: 112 [2023-11-21 22:07:35,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:07:35,666 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 154 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:35,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 53 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:07:35,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-11-21 22:07:35,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 105. [2023-11-21 22:07:35,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 68 states have (on average 1.7941176470588236) internal successors, (122), 104 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:35,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 122 transitions. [2023-11-21 22:07:35,676 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 122 transitions. Word has length 11 [2023-11-21 22:07:35,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:35,677 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 122 transitions. [2023-11-21 22:07:35,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:35,677 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 122 transitions. [2023-11-21 22:07:35,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-21 22:07:35,678 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:35,678 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:07:35,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:07:35,679 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:07:35,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:35,680 INFO L85 PathProgramCache]: Analyzing trace with hash -273737593, now seen corresponding path program 1 times [2023-11-21 22:07:35,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:35,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175603909] [2023-11-21 22:07:35,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:35,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:35,858 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 22:07:35,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:35,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175603909] [2023-11-21 22:07:35,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175603909] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:35,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:35,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:07:35,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296512106] [2023-11-21 22:07:35,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:35,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:07:35,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:35,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:07:35,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:07:35,862 INFO L87 Difference]: Start difference. First operand 105 states and 122 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:36,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:36,138 INFO L93 Difference]: Finished difference Result 152 states and 171 transitions. [2023-11-21 22:07:36,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:07:36,139 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-21 22:07:36,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:36,140 INFO L225 Difference]: With dead ends: 152 [2023-11-21 22:07:36,141 INFO L226 Difference]: Without dead ends: 152 [2023-11-21 22:07:36,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:07:36,142 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 154 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:36,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 90 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:07:36,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-11-21 22:07:36,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 130. [2023-11-21 22:07:36,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 93 states have (on average 1.6881720430107527) internal successors, (157), 129 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:36,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 157 transitions. [2023-11-21 22:07:36,158 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 157 transitions. Word has length 11 [2023-11-21 22:07:36,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:36,159 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 157 transitions. [2023-11-21 22:07:36,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:36,159 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 157 transitions. [2023-11-21 22:07:36,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-21 22:07:36,162 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:36,162 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:07:36,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 22:07:36,163 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:07:36,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:36,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1068634324, now seen corresponding path program 1 times [2023-11-21 22:07:36,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:36,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228099597] [2023-11-21 22:07:36,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:36,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:36,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:36,358 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 22:07:36,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:36,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228099597] [2023-11-21 22:07:36,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228099597] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:36,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:36,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:07:36,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130833121] [2023-11-21 22:07:36,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:36,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:07:36,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:36,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:07:36,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:07:36,362 INFO L87 Difference]: Start difference. First operand 130 states and 157 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:36,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:36,583 INFO L93 Difference]: Finished difference Result 129 states and 155 transitions. [2023-11-21 22:07:36,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:07:36,583 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-21 22:07:36,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:36,585 INFO L225 Difference]: With dead ends: 129 [2023-11-21 22:07:36,585 INFO L226 Difference]: Without dead ends: 129 [2023-11-21 22:07:36,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 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 22:07:36,587 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 6 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:36,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 230 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:07:36,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-21 22:07:36,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-11-21 22:07:36,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 93 states have (on average 1.6666666666666667) internal successors, (155), 128 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:36,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 155 transitions. [2023-11-21 22:07:36,605 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 155 transitions. Word has length 13 [2023-11-21 22:07:36,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:36,605 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 155 transitions. [2023-11-21 22:07:36,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:36,606 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 155 transitions. [2023-11-21 22:07:36,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-21 22:07:36,607 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:36,607 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:07:36,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 22:07:36,607 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:07:36,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:36,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1068634323, now seen corresponding path program 1 times [2023-11-21 22:07:36,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:36,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619990173] [2023-11-21 22:07:36,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:36,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:36,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:36,856 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 22:07:36,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:36,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619990173] [2023-11-21 22:07:36,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619990173] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:36,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:36,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:07:36,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247729698] [2023-11-21 22:07:36,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:36,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:07:36,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:36,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:07:36,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:07:36,859 INFO L87 Difference]: Start difference. First operand 129 states and 155 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:37,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:37,095 INFO L93 Difference]: Finished difference Result 128 states and 153 transitions. [2023-11-21 22:07:37,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:07:37,096 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-21 22:07:37,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:37,097 INFO L225 Difference]: With dead ends: 128 [2023-11-21 22:07:37,097 INFO L226 Difference]: Without dead ends: 128 [2023-11-21 22:07:37,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 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 22:07:37,098 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 3 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:37,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 219 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:07:37,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-21 22:07:37,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2023-11-21 22:07:37,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 93 states have (on average 1.6451612903225807) internal successors, (153), 127 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:37,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 153 transitions. [2023-11-21 22:07:37,104 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 153 transitions. Word has length 13 [2023-11-21 22:07:37,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:37,104 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 153 transitions. [2023-11-21 22:07:37,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:37,104 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 153 transitions. [2023-11-21 22:07:37,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-21 22:07:37,105 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:37,105 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:07:37,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 22:07:37,106 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr71ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:07:37,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:37,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1226407054, now seen corresponding path program 1 times [2023-11-21 22:07:37,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:37,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049655006] [2023-11-21 22:07:37,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:37,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:37,157 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 22:07:37,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:37,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049655006] [2023-11-21 22:07:37,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049655006] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:37,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:37,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:07:37,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255593229] [2023-11-21 22:07:37,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:37,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:07:37,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:37,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:07:37,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:07:37,159 INFO L87 Difference]: Start difference. First operand 128 states and 153 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:37,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:37,325 INFO L93 Difference]: Finished difference Result 145 states and 164 transitions. [2023-11-21 22:07:37,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:07:37,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-21 22:07:37,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:37,327 INFO L225 Difference]: With dead ends: 145 [2023-11-21 22:07:37,327 INFO L226 Difference]: Without dead ends: 145 [2023-11-21 22:07:37,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:07:37,328 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 115 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:37,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 119 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:07:37,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-21 22:07:37,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 128. [2023-11-21 22:07:37,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 93 states have (on average 1.6236559139784945) internal successors, (151), 127 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:37,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 151 transitions. [2023-11-21 22:07:37,334 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 151 transitions. Word has length 14 [2023-11-21 22:07:37,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:37,334 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 151 transitions. [2023-11-21 22:07:37,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:37,334 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 151 transitions. [2023-11-21 22:07:37,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 22:07:37,335 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:37,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:07:37,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 22:07:37,336 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:07:37,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:37,337 INFO L85 PathProgramCache]: Analyzing trace with hash -460212941, now seen corresponding path program 1 times [2023-11-21 22:07:37,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:37,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182022308] [2023-11-21 22:07:37,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:37,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:37,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:37,663 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 22:07:37,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:37,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182022308] [2023-11-21 22:07:37,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182022308] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:37,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:37,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 22:07:37,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198645058] [2023-11-21 22:07:37,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:37,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 22:07:37,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:37,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 22:07:37,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:07:37,667 INFO L87 Difference]: Start difference. First operand 128 states and 151 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:38,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:38,017 INFO L93 Difference]: Finished difference Result 129 states and 150 transitions. [2023-11-21 22:07:38,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:07:38,018 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-21 22:07:38,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:38,019 INFO L225 Difference]: With dead ends: 129 [2023-11-21 22:07:38,019 INFO L226 Difference]: Without dead ends: 129 [2023-11-21 22:07:38,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-21 22:07:38,020 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 147 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:38,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 158 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:07:38,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-21 22:07:38,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2023-11-21 22:07:38,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 93 states have (on average 1.6129032258064515) internal successors, (150), 126 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:38,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 150 transitions. [2023-11-21 22:07:38,026 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 150 transitions. Word has length 15 [2023-11-21 22:07:38,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:38,026 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 150 transitions. [2023-11-21 22:07:38,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:38,027 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 150 transitions. [2023-11-21 22:07:38,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 22:07:38,027 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:38,028 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:07:38,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 22:07:38,029 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:07:38,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:38,030 INFO L85 PathProgramCache]: Analyzing trace with hash -460212940, now seen corresponding path program 1 times [2023-11-21 22:07:38,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:38,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378393113] [2023-11-21 22:07:38,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:38,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:38,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:38,479 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 22:07:38,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:38,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378393113] [2023-11-21 22:07:38,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378393113] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:38,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:38,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 22:07:38,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011231423] [2023-11-21 22:07:38,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:38,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 22:07:38,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:38,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 22:07:38,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:07:38,482 INFO L87 Difference]: Start difference. First operand 127 states and 150 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:39,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:39,042 INFO L93 Difference]: Finished difference Result 119 states and 140 transitions. [2023-11-21 22:07:39,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 22:07:39,043 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-21 22:07:39,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:39,044 INFO L225 Difference]: With dead ends: 119 [2023-11-21 22:07:39,044 INFO L226 Difference]: Without dead ends: 119 [2023-11-21 22:07:39,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2023-11-21 22:07:39,046 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 138 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:39,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 195 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:07:39,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-21 22:07:39,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 110. [2023-11-21 22:07:39,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 87 states have (on average 1.5172413793103448) internal successors, (132), 109 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:39,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 132 transitions. [2023-11-21 22:07:39,051 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 132 transitions. Word has length 15 [2023-11-21 22:07:39,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:39,051 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 132 transitions. [2023-11-21 22:07:39,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:39,052 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 132 transitions. [2023-11-21 22:07:39,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-21 22:07:39,053 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:39,054 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 22:07:39,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 22:07:39,054 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:07:39,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:39,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1548028462, now seen corresponding path program 1 times [2023-11-21 22:07:39,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:39,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3244691] [2023-11-21 22:07:39,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:39,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:39,118 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 22:07:39,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:39,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3244691] [2023-11-21 22:07:39,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3244691] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:39,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:39,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:07:39,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944926005] [2023-11-21 22:07:39,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:39,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:07:39,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:39,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:07:39,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:07:39,122 INFO L87 Difference]: Start difference. First operand 110 states and 132 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:39,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:39,223 INFO L93 Difference]: Finished difference Result 132 states and 162 transitions. [2023-11-21 22:07:39,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:07:39,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-21 22:07:39,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:39,226 INFO L225 Difference]: With dead ends: 132 [2023-11-21 22:07:39,226 INFO L226 Difference]: Without dead ends: 132 [2023-11-21 22:07:39,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:07:39,227 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 18 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:39,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 204 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:07:39,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-21 22:07:39,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2023-11-21 22:07:39,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 91 states have (on average 1.4945054945054945) internal successors, (136), 113 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:39,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 136 transitions. [2023-11-21 22:07:39,234 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 136 transitions. Word has length 18 [2023-11-21 22:07:39,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:39,234 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 136 transitions. [2023-11-21 22:07:39,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:39,235 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 136 transitions. [2023-11-21 22:07:39,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-21 22:07:39,236 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:39,236 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:07:39,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-21 22:07:39,236 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:07:39,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:39,237 INFO L85 PathProgramCache]: Analyzing trace with hash 680428813, now seen corresponding path program 1 times [2023-11-21 22:07:39,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:39,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549730663] [2023-11-21 22:07:39,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:39,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:39,599 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 22:07:39,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:39,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549730663] [2023-11-21 22:07:39,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549730663] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:39,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:39,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:07:39,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972675983] [2023-11-21 22:07:39,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:39,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 22:07:39,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:39,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 22:07:39,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:07:39,603 INFO L87 Difference]: Start difference. First operand 114 states and 136 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:40,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:40,009 INFO L93 Difference]: Finished difference Result 203 states and 242 transitions. [2023-11-21 22:07:40,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 22:07:40,009 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-21 22:07:40,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:40,011 INFO L225 Difference]: With dead ends: 203 [2023-11-21 22:07:40,011 INFO L226 Difference]: Without dead ends: 203 [2023-11-21 22:07:40,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:07:40,012 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 183 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:40,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 206 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:07:40,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-11-21 22:07:40,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 126. [2023-11-21 22:07:40,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 103 states have (on average 1.4757281553398058) internal successors, (152), 125 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:40,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 152 transitions. [2023-11-21 22:07:40,017 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 152 transitions. Word has length 19 [2023-11-21 22:07:40,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:40,018 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 152 transitions. [2023-11-21 22:07:40,018 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:40,018 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 152 transitions. [2023-11-21 22:07:40,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-21 22:07:40,019 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:40,019 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:07:40,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-21 22:07:40,019 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:07:40,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:40,020 INFO L85 PathProgramCache]: Analyzing trace with hash 680428814, now seen corresponding path program 1 times [2023-11-21 22:07:40,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:40,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893788348] [2023-11-21 22:07:40,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:40,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:40,290 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 22:07:40,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:40,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893788348] [2023-11-21 22:07:40,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893788348] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:40,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:40,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:07:40,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311401729] [2023-11-21 22:07:40,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:40,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:07:40,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:40,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:07:40,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:07:40,294 INFO L87 Difference]: Start difference. First operand 126 states and 152 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:40,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:40,686 INFO L93 Difference]: Finished difference Result 188 states and 219 transitions. [2023-11-21 22:07:40,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:07:40,687 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-21 22:07:40,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:40,689 INFO L225 Difference]: With dead ends: 188 [2023-11-21 22:07:40,689 INFO L226 Difference]: Without dead ends: 188 [2023-11-21 22:07:40,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-21 22:07:40,690 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 164 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:40,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 254 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:07:40,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-21 22:07:40,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 122. [2023-11-21 22:07:40,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 99 states have (on average 1.4747474747474747) internal successors, (146), 121 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:40,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 146 transitions. [2023-11-21 22:07:40,697 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 146 transitions. Word has length 19 [2023-11-21 22:07:40,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:40,697 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 146 transitions. [2023-11-21 22:07:40,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:40,697 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 146 transitions. [2023-11-21 22:07:40,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-21 22:07:40,698 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:40,698 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] [2023-11-21 22:07:40,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-21 22:07:40,699 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:07:40,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:40,700 INFO L85 PathProgramCache]: Analyzing trace with hash 179017512, now seen corresponding path program 1 times [2023-11-21 22:07:40,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:40,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716406053] [2023-11-21 22:07:40,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:40,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:40,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:41,037 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 22:07:41,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:41,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716406053] [2023-11-21 22:07:41,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716406053] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:41,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:41,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 22:07:41,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117574045] [2023-11-21 22:07:41,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:41,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 22:07:41,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:41,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 22:07:41,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:07:41,040 INFO L87 Difference]: Start difference. First operand 122 states and 146 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:41,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:41,761 INFO L93 Difference]: Finished difference Result 260 states and 307 transitions. [2023-11-21 22:07:41,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-21 22:07:41,762 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-21 22:07:41,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:41,764 INFO L225 Difference]: With dead ends: 260 [2023-11-21 22:07:41,764 INFO L226 Difference]: Without dead ends: 260 [2023-11-21 22:07:41,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2023-11-21 22:07:41,766 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 297 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:41,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 383 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:07:41,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-11-21 22:07:41,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 133. [2023-11-21 22:07:41,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 110 states have (on average 1.4636363636363636) internal successors, (161), 132 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:41,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 161 transitions. [2023-11-21 22:07:41,773 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 161 transitions. Word has length 20 [2023-11-21 22:07:41,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:41,773 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 161 transitions. [2023-11-21 22:07:41,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:41,774 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 161 transitions. [2023-11-21 22:07:41,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-21 22:07:41,775 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:41,775 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] [2023-11-21 22:07:41,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-21 22:07:41,776 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:07:41,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:41,776 INFO L85 PathProgramCache]: Analyzing trace with hash 179017513, now seen corresponding path program 1 times [2023-11-21 22:07:41,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:41,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921533557] [2023-11-21 22:07:41,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:41,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:41,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:42,374 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 22:07:42,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:42,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921533557] [2023-11-21 22:07:42,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921533557] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:42,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:42,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 22:07:42,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564024731] [2023-11-21 22:07:42,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:42,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 22:07:42,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:42,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 22:07:42,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:07:42,377 INFO L87 Difference]: Start difference. First operand 133 states and 161 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:43,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:43,013 INFO L93 Difference]: Finished difference Result 201 states and 236 transitions. [2023-11-21 22:07:43,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 22:07:43,013 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-21 22:07:43,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:43,015 INFO L225 Difference]: With dead ends: 201 [2023-11-21 22:07:43,015 INFO L226 Difference]: Without dead ends: 201 [2023-11-21 22:07:43,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2023-11-21 22:07:43,016 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 291 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:43,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 337 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:07:43,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-11-21 22:07:43,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 133. [2023-11-21 22:07:43,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 110 states have (on average 1.4545454545454546) internal successors, (160), 132 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:43,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 160 transitions. [2023-11-21 22:07:43,021 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 160 transitions. Word has length 20 [2023-11-21 22:07:43,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:43,022 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 160 transitions. [2023-11-21 22:07:43,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:43,022 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 160 transitions. [2023-11-21 22:07:43,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-21 22:07:43,023 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:43,023 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] [2023-11-21 22:07:43,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-21 22:07:43,023 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:07:43,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:43,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1112470740, now seen corresponding path program 1 times [2023-11-21 22:07:43,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:43,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504686474] [2023-11-21 22:07:43,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:43,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:43,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:43,165 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 22:07:43,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:43,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504686474] [2023-11-21 22:07:43,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504686474] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:43,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:43,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:07:43,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558820379] [2023-11-21 22:07:43,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:43,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:07:43,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:43,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:07:43,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:07:43,169 INFO L87 Difference]: Start difference. First operand 133 states and 160 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:43,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:43,351 INFO L93 Difference]: Finished difference Result 139 states and 167 transitions. [2023-11-21 22:07:43,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:07:43,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-21 22:07:43,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:43,353 INFO L225 Difference]: With dead ends: 139 [2023-11-21 22:07:43,353 INFO L226 Difference]: Without dead ends: 139 [2023-11-21 22:07:43,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 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 22:07:43,354 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 6 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:43,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 207 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:07:43,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-11-21 22:07:43,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 132. [2023-11-21 22:07:43,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 110 states have (on average 1.4454545454545455) internal successors, (159), 131 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:43,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 159 transitions. [2023-11-21 22:07:43,358 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 159 transitions. Word has length 20 [2023-11-21 22:07:43,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:43,358 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 159 transitions. [2023-11-21 22:07:43,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:43,359 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 159 transitions. [2023-11-21 22:07:43,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-21 22:07:43,359 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:43,359 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] [2023-11-21 22:07:43,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-21 22:07:43,360 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:07:43,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:43,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1112470739, now seen corresponding path program 1 times [2023-11-21 22:07:43,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:43,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432522674] [2023-11-21 22:07:43,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:43,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:43,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:43,656 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 22:07:43,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:43,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432522674] [2023-11-21 22:07:43,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432522674] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:43,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:43,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:07:43,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037271352] [2023-11-21 22:07:43,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:43,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:07:43,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:43,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:07:43,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:07:43,659 INFO L87 Difference]: Start difference. First operand 132 states and 159 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:43,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:43,834 INFO L93 Difference]: Finished difference Result 131 states and 158 transitions. [2023-11-21 22:07:43,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:07:43,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-21 22:07:43,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:43,836 INFO L225 Difference]: With dead ends: 131 [2023-11-21 22:07:43,836 INFO L226 Difference]: Without dead ends: 131 [2023-11-21 22:07:43,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 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 22:07:43,837 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 1 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:43,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 202 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:07:43,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-21 22:07:43,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2023-11-21 22:07:43,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 110 states have (on average 1.4363636363636363) internal successors, (158), 130 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:43,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 158 transitions. [2023-11-21 22:07:43,844 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 158 transitions. Word has length 20 [2023-11-21 22:07:43,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:43,844 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 158 transitions. [2023-11-21 22:07:43,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:43,845 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 158 transitions. [2023-11-21 22:07:43,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-21 22:07:43,847 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:43,848 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 22:07:43,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-21 22:07:43,849 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:07:43,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:43,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1775575368, now seen corresponding path program 1 times [2023-11-21 22:07:43,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:43,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051893373] [2023-11-21 22:07:43,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:43,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:43,901 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 22:07:43,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:43,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051893373] [2023-11-21 22:07:43,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051893373] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:43,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:43,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:07:43,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453952432] [2023-11-21 22:07:43,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:43,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:07:43,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:43,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:07:43,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:07:43,908 INFO L87 Difference]: Start difference. First operand 131 states and 158 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:43,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:43,968 INFO L93 Difference]: Finished difference Result 133 states and 160 transitions. [2023-11-21 22:07:43,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:07:43,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-21 22:07:43,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:43,970 INFO L225 Difference]: With dead ends: 133 [2023-11-21 22:07:43,971 INFO L226 Difference]: Without dead ends: 133 [2023-11-21 22:07:43,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:07:43,972 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 0 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:43,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:07:43,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-21 22:07:43,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2023-11-21 22:07:43,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 112 states have (on average 1.4285714285714286) internal successors, (160), 132 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:43,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 160 transitions. [2023-11-21 22:07:43,979 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 160 transitions. Word has length 21 [2023-11-21 22:07:43,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:43,980 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 160 transitions. [2023-11-21 22:07:43,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:43,981 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 160 transitions. [2023-11-21 22:07:43,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-21 22:07:43,981 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:43,981 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 22:07:43,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-21 22:07:43,982 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:07:43,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:43,984 INFO L85 PathProgramCache]: Analyzing trace with hash 795755568, now seen corresponding path program 1 times [2023-11-21 22:07:43,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:43,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122284328] [2023-11-21 22:07:43,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:43,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:44,212 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 22:07:44,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:44,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122284328] [2023-11-21 22:07:44,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122284328] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:44,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:44,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:07:44,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42796552] [2023-11-21 22:07:44,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:44,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:07:44,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:44,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:07:44,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:07:44,215 INFO L87 Difference]: Start difference. First operand 133 states and 160 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:44,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:44,505 INFO L93 Difference]: Finished difference Result 196 states and 230 transitions. [2023-11-21 22:07:44,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 22:07:44,506 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-21 22:07:44,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:44,507 INFO L225 Difference]: With dead ends: 196 [2023-11-21 22:07:44,507 INFO L226 Difference]: Without dead ends: 196 [2023-11-21 22:07:44,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-21 22:07:44,508 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 189 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:44,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 201 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:07:44,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-11-21 22:07:44,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 138. [2023-11-21 22:07:44,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 117 states have (on average 1.4188034188034189) internal successors, (166), 137 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:44,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 166 transitions. [2023-11-21 22:07:44,514 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 166 transitions. Word has length 22 [2023-11-21 22:07:44,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:44,514 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 166 transitions. [2023-11-21 22:07:44,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:44,514 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 166 transitions. [2023-11-21 22:07:44,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-21 22:07:44,515 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:44,515 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 22:07:44,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-21 22:07:44,515 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:07:44,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:44,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1147942965, now seen corresponding path program 1 times [2023-11-21 22:07:44,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:44,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88809092] [2023-11-21 22:07:44,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:44,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:44,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:44,827 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 22:07:44,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:44,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88809092] [2023-11-21 22:07:44,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88809092] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:44,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:44,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-21 22:07:44,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405653550] [2023-11-21 22:07:44,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:44,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 22:07:44,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:44,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 22:07:44,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:07:44,831 INFO L87 Difference]: Start difference. First operand 138 states and 166 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:45,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:45,403 INFO L93 Difference]: Finished difference Result 204 states and 235 transitions. [2023-11-21 22:07:45,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-21 22:07:45,404 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-21 22:07:45,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:45,406 INFO L225 Difference]: With dead ends: 204 [2023-11-21 22:07:45,406 INFO L226 Difference]: Without dead ends: 204 [2023-11-21 22:07:45,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2023-11-21 22:07:45,408 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 228 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:45,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 323 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:07:45,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-11-21 22:07:45,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 138. [2023-11-21 22:07:45,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 117 states have (on average 1.4102564102564104) internal successors, (165), 137 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:45,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 165 transitions. [2023-11-21 22:07:45,417 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 165 transitions. Word has length 23 [2023-11-21 22:07:45,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:45,417 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 165 transitions. [2023-11-21 22:07:45,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:45,417 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 165 transitions. [2023-11-21 22:07:45,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-21 22:07:45,418 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:45,418 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:07:45,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-21 22:07:45,418 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:07:45,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:45,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1215386046, now seen corresponding path program 1 times [2023-11-21 22:07:45,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:45,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847832360] [2023-11-21 22:07:45,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:45,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:45,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:07:45,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:45,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847832360] [2023-11-21 22:07:45,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847832360] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:45,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:45,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:07:45,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842687980] [2023-11-21 22:07:45,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:45,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:07:45,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:45,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:07:45,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:07:45,497 INFO L87 Difference]: Start difference. First operand 138 states and 165 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:45,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:45,590 INFO L93 Difference]: Finished difference Result 148 states and 176 transitions. [2023-11-21 22:07:45,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:07:45,591 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-21 22:07:45,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:45,592 INFO L225 Difference]: With dead ends: 148 [2023-11-21 22:07:45,593 INFO L226 Difference]: Without dead ends: 148 [2023-11-21 22:07:45,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:07:45,594 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 7 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:45,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 199 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:07:45,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-21 22:07:45,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 142. [2023-11-21 22:07:45,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 121 states have (on average 1.3884297520661157) internal successors, (168), 141 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:45,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 168 transitions. [2023-11-21 22:07:45,600 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 168 transitions. Word has length 23 [2023-11-21 22:07:45,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:45,601 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 168 transitions. [2023-11-21 22:07:45,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:45,601 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 168 transitions. [2023-11-21 22:07:45,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-21 22:07:45,602 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:45,602 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 22:07:45,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-21 22:07:45,603 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:07:45,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:45,603 INFO L85 PathProgramCache]: Analyzing trace with hash -42875862, now seen corresponding path program 1 times [2023-11-21 22:07:45,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:45,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425708630] [2023-11-21 22:07:45,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:45,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:45,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:45,828 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 22:07:45,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:45,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425708630] [2023-11-21 22:07:45,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425708630] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:45,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:45,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:07:45,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145466024] [2023-11-21 22:07:45,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:45,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:07:45,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:45,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:07:45,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:07:45,832 INFO L87 Difference]: Start difference. First operand 142 states and 168 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:46,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:46,133 INFO L93 Difference]: Finished difference Result 175 states and 204 transitions. [2023-11-21 22:07:46,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:07:46,133 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-21 22:07:46,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:46,135 INFO L225 Difference]: With dead ends: 175 [2023-11-21 22:07:46,135 INFO L226 Difference]: Without dead ends: 175 [2023-11-21 22:07:46,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:07:46,136 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 43 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:46,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 217 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:07:46,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-11-21 22:07:46,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 145. [2023-11-21 22:07:46,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 124 states have (on average 1.3870967741935485) internal successors, (172), 144 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:46,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 172 transitions. [2023-11-21 22:07:46,143 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 172 transitions. Word has length 24 [2023-11-21 22:07:46,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:46,143 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 172 transitions. [2023-11-21 22:07:46,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:46,144 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 172 transitions. [2023-11-21 22:07:46,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-21 22:07:46,145 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:46,146 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:07:46,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-21 22:07:46,146 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:07:46,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:46,147 INFO L85 PathProgramCache]: Analyzing trace with hash 227448250, now seen corresponding path program 1 times [2023-11-21 22:07:46,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:46,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90398223] [2023-11-21 22:07:46,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:46,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:46,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:46,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:07:46,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:46,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90398223] [2023-11-21 22:07:46,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90398223] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:07:46,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613494581] [2023-11-21 22:07:46,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:46,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:07:46,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:07:46,591 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:07:46,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:07:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:46,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-21 22:07:46,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:07:46,886 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 22:07:46,895 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 22:07:46,937 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 22:07:46,948 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 22:07:46,993 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 22:07:47,003 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 22:07:47,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-21 22:07:47,043 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 22:07:47,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:07:47,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:07:48,136 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 8 [2023-11-21 22:07:48,142 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 14 treesize of output 12 [2023-11-21 22:07:48,153 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 8 [2023-11-21 22:07:48,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:07:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:07:48,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613494581] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:07:48,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:07:48,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 12 [2023-11-21 22:07:48,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614773607] [2023-11-21 22:07:48,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:07:48,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-21 22:07:48,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:48,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-21 22:07:48,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-21 22:07:48,169 INFO L87 Difference]: Start difference. First operand 145 states and 172 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 12 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:48,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:48,742 INFO L93 Difference]: Finished difference Result 203 states and 233 transitions. [2023-11-21 22:07:48,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-21 22:07:48,742 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 12 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-21 22:07:48,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:48,744 INFO L225 Difference]: With dead ends: 203 [2023-11-21 22:07:48,744 INFO L226 Difference]: Without dead ends: 203 [2023-11-21 22:07:48,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2023-11-21 22:07:48,745 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 406 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:48,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 291 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:07:48,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-11-21 22:07:48,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 171. [2023-11-21 22:07:48,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 150 states have (on average 1.38) internal successors, (207), 170 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:48,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 207 transitions. [2023-11-21 22:07:48,750 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 207 transitions. Word has length 24 [2023-11-21 22:07:48,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:48,750 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 207 transitions. [2023-11-21 22:07:48,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 12 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:48,751 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 207 transitions. [2023-11-21 22:07:48,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-21 22:07:48,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:48,751 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 22:07:48,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-21 22:07:48,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-21 22:07:48,967 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:07:48,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:48,967 INFO L85 PathProgramCache]: Analyzing trace with hash 81005459, now seen corresponding path program 1 times [2023-11-21 22:07:48,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:48,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686572390] [2023-11-21 22:07:48,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:48,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:49,610 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 22:07:49,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:49,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686572390] [2023-11-21 22:07:49,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686572390] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:49,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:49,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-21 22:07:49,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793221177] [2023-11-21 22:07:49,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:49,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-21 22:07:49,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:49,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-21 22:07:49,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-21 22:07:49,613 INFO L87 Difference]: Start difference. First operand 171 states and 207 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:50,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:50,464 INFO L93 Difference]: Finished difference Result 203 states and 237 transitions. [2023-11-21 22:07:50,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-21 22:07:50,464 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-21 22:07:50,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:50,466 INFO L225 Difference]: With dead ends: 203 [2023-11-21 22:07:50,466 INFO L226 Difference]: Without dead ends: 203 [2023-11-21 22:07:50,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2023-11-21 22:07:50,467 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 237 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:50,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 409 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:07:50,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-11-21 22:07:50,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 169. [2023-11-21 22:07:50,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 148 states have (on average 1.3716216216216217) internal successors, (203), 168 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:50,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 203 transitions. [2023-11-21 22:07:50,472 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 203 transitions. Word has length 26 [2023-11-21 22:07:50,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:50,472 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 203 transitions. [2023-11-21 22:07:50,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:50,473 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 203 transitions. [2023-11-21 22:07:50,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-21 22:07:50,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:50,473 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:07:50,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-21 22:07:50,473 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr69ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:07:50,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:50,474 INFO L85 PathProgramCache]: Analyzing trace with hash -826534479, now seen corresponding path program 1 times [2023-11-21 22:07:50,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:50,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479895905] [2023-11-21 22:07:50,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:50,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:50,547 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 22:07:50,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:50,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479895905] [2023-11-21 22:07:50,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479895905] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:50,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:50,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:07:50,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182942506] [2023-11-21 22:07:50,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:50,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:07:50,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:50,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:07:50,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:07:50,549 INFO L87 Difference]: Start difference. First operand 169 states and 203 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:50,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:50,690 INFO L93 Difference]: Finished difference Result 183 states and 209 transitions. [2023-11-21 22:07:50,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:07:50,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-11-21 22:07:50,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:50,692 INFO L225 Difference]: With dead ends: 183 [2023-11-21 22:07:50,692 INFO L226 Difference]: Without dead ends: 183 [2023-11-21 22:07:50,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:07:50,693 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 101 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:50,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 98 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:07:50,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-11-21 22:07:50,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 171. [2023-11-21 22:07:50,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 150 states have (on average 1.3533333333333333) internal successors, (203), 170 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:50,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 203 transitions. [2023-11-21 22:07:50,698 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 203 transitions. Word has length 29 [2023-11-21 22:07:50,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:50,698 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 203 transitions. [2023-11-21 22:07:50,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:50,698 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 203 transitions. [2023-11-21 22:07:50,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-21 22:07:50,698 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:50,699 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] [2023-11-21 22:07:50,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-21 22:07:50,699 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:07:50,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:50,699 INFO L85 PathProgramCache]: Analyzing trace with hash -826545464, now seen corresponding path program 1 times [2023-11-21 22:07:50,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:50,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242265231] [2023-11-21 22:07:50,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:50,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:50,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:50,884 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 22:07:50,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:50,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242265231] [2023-11-21 22:07:50,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242265231] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:50,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:50,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:07:50,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532105636] [2023-11-21 22:07:50,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:50,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:07:50,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:50,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:07:50,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:07:50,887 INFO L87 Difference]: Start difference. First operand 171 states and 203 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:51,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:51,130 INFO L93 Difference]: Finished difference Result 208 states and 242 transitions. [2023-11-21 22:07:51,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:07:51,131 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-11-21 22:07:51,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:51,132 INFO L225 Difference]: With dead ends: 208 [2023-11-21 22:07:51,132 INFO L226 Difference]: Without dead ends: 208 [2023-11-21 22:07:51,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:07:51,133 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 117 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:51,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 235 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:07:51,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-11-21 22:07:51,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 184. [2023-11-21 22:07:51,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 163 states have (on average 1.3312883435582823) internal successors, (217), 183 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:51,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 217 transitions. [2023-11-21 22:07:51,138 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 217 transitions. Word has length 29 [2023-11-21 22:07:51,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:51,139 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 217 transitions. [2023-11-21 22:07:51,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:51,139 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 217 transitions. [2023-11-21 22:07:51,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-21 22:07:51,139 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:51,139 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 22:07:51,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-21 22:07:51,140 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:07:51,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:51,141 INFO L85 PathProgramCache]: Analyzing trace with hash 146894648, now seen corresponding path program 1 times [2023-11-21 22:07:51,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:51,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589116943] [2023-11-21 22:07:51,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:51,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:51,507 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 22:07:51,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:51,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589116943] [2023-11-21 22:07:51,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589116943] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:07:51,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296673821] [2023-11-21 22:07:51,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:51,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:07:51,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:07:51,510 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:07:51,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:07:51,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:51,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-21 22:07:51,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:07:51,677 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 22:07:51,694 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 22:07:51,840 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 22:07:51,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:07:52,234 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 20 treesize of output 18 [2023-11-21 22:07:52,241 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 46 treesize of output 42 [2023-11-21 22:07:52,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:07:52,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296673821] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-21 22:07:52,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:07:52,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 7] total 20 [2023-11-21 22:07:52,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481006486] [2023-11-21 22:07:52,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:52,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 22:07:52,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:52,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 22:07:52,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2023-11-21 22:07:52,273 INFO L87 Difference]: Start difference. First operand 184 states and 217 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:52,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:52,770 INFO L93 Difference]: Finished difference Result 195 states and 227 transitions. [2023-11-21 22:07:52,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 22:07:52,771 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-11-21 22:07:52,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:52,772 INFO L225 Difference]: With dead ends: 195 [2023-11-21 22:07:52,772 INFO L226 Difference]: Without dead ends: 195 [2023-11-21 22:07:52,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2023-11-21 22:07:52,773 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 162 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:52,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 380 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:07:52,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-11-21 22:07:52,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 182. [2023-11-21 22:07:52,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 161 states have (on average 1.329192546583851) internal successors, (214), 181 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:52,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 214 transitions. [2023-11-21 22:07:52,779 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 214 transitions. Word has length 30 [2023-11-21 22:07:52,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:52,780 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 214 transitions. [2023-11-21 22:07:52,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:07:52,780 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 214 transitions. [2023-11-21 22:07:52,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-21 22:07:52,781 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:52,781 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:07:52,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:07:52,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-21 22:07:52,993 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:07:52,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:52,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1967085807, now seen corresponding path program 1 times [2023-11-21 22:07:52,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:52,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771608332] [2023-11-21 22:07:52,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:52,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:53,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:07:53,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:53,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771608332] [2023-11-21 22:07:53,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771608332] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:07:53,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363407258] [2023-11-21 22:07:53,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:53,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:07:53,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:07:53,738 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:07:53,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:07:53,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:53,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-21 22:07:53,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:07:53,919 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 22:07:53,945 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 22:07:53,984 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 22:07:54,058 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-21 22:07:54,058 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 22:07:54,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-21 22:07:54,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:07:54,118 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 22:07:54,227 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-21 22:07:54,227 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 41 treesize of output 38 [2023-11-21 22:07:54,234 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 24 treesize of output 11 [2023-11-21 22:07:54,245 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 16 treesize of output 8 [2023-11-21 22:07:54,281 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 22:07:54,301 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 22:07:54,313 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 22:07:54,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:07:54,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:07:54,504 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1037 (Array Int Int))) (not (= 2 (select (select (store |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_1037) |c_ULTIMATE.start_main_~head~0#1.base|) (+ |c_ULTIMATE.start_main_~head~0#1.offset| 12))))) is different from false [2023-11-21 22:07:54,512 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1037 (Array Int Int)) (v_ArrVal_1034 (Array Int Int)) (v_ArrVal_1033 (Array Int Int))) (not (= 2 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_#t~mem8#1.base| v_ArrVal_1033) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem8#1.base| v_ArrVal_1034) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_1037) |c_ULTIMATE.start_main_~head~0#1.base|) (+ |c_ULTIMATE.start_main_~head~0#1.offset| 12))))) is different from false [2023-11-21 22:07:54,519 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1037 (Array Int Int)) (v_ArrVal_1034 (Array Int Int)) (v_ArrVal_1033 (Array Int Int))) (not (= (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (store (store |c_#memory_int| .cse0 v_ArrVal_1033) (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1034) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_1037)) |c_ULTIMATE.start_main_~head~0#1.base|) (+ |c_ULTIMATE.start_main_~head~0#1.offset| 12)) 2))) is different from false [2023-11-21 22:07:54,529 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:07:54,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 40 [2023-11-21 22:07:54,533 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 73 treesize of output 65 [2023-11-21 22:07:54,537 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 26 treesize of output 24 [2023-11-21 22:07:56,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-11-21 22:07:56,924 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:07:56,925 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:07:56,931 INFO L349 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-11-21 22:07:56,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 1 [2023-11-21 22:07:58,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:07:58,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363407258] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:07:58,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:07:58,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 13] total 33 [2023-11-21 22:07:58,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905886319] [2023-11-21 22:07:58,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:07:58,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-21 22:07:58,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:58,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-21 22:07:58,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=812, Unknown=10, NotChecked=180, Total=1122 [2023-11-21 22:07:58,982 INFO L87 Difference]: Start difference. First operand 182 states and 214 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:08:02,155 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#valid| |c_ULTIMATE.start_main_~x~0#1.base|)) (.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|)) (.cse2 (+ |c_ULTIMATE.start_main_~head~0#1.offset| 12)) (.cse4 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|)) (.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~head~0#1.base|))) (and (= .cse0 1) (= |c_ULTIMATE.start_main_~head~0#1.offset| 0) (not (= |c_ULTIMATE.start_main_~head~0#1.base| |c_ULTIMATE.start_main_~x~0#1.base|)) (= (select .cse1 (+ |c_ULTIMATE.start_main_~head~0#1.offset| 8)) |c_ULTIMATE.start_main_~head~0#1.base|) (or (not (= .cse0 0)) (forall ((v_ArrVal_1037 (Array Int Int)) (v_arrayElimCell_24 Int) (v_ArrVal_1033 (Array Int Int))) (not (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_1033) v_arrayElimCell_24 v_ArrVal_1037) |c_ULTIMATE.start_main_~head~0#1.base|) .cse2) 2)))) (forall ((v_ArrVal_1037 (Array Int Int)) (v_ArrVal_1034 (Array Int Int)) (v_ArrVal_1033 (Array Int Int))) (not (= (select (select (let ((.cse3 (select .cse4 |c_ULTIMATE.start_main_~x~0#1.offset|))) (store (store |c_#memory_int| .cse3 v_ArrVal_1033) (select (select (store |c_#memory_$Pointer$.base| .cse3 v_ArrVal_1034) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_1037)) |c_ULTIMATE.start_main_~head~0#1.base|) .cse2) 2))) (= (select |c_#valid| |c_ULTIMATE.start_main_~head~0#1.base|) 1) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~head~0#1.base|) 12) 1) (not (= 2 (select .cse5 (+ |c_ULTIMATE.start_main_~x~0#1.offset| 12)))) (forall ((|v_ULTIMATE.start_main_#t~malloc7#1.base_15| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc7#1.base_15|) 0)) (= |v_ULTIMATE.start_main_#t~malloc7#1.base_15| |c_ULTIMATE.start_main_~x~0#1.base|) (forall ((v_ArrVal_1031 Int) (v_ArrVal_1037 (Array Int Int))) (not (= 2 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~x~0#1.offset| v_ArrVal_1031)) |v_ULTIMATE.start_main_#t~malloc7#1.base_15| v_ArrVal_1037) |c_ULTIMATE.start_main_~head~0#1.base|) .cse2)))))) (= (select .cse4 (+ |c_ULTIMATE.start_main_~x~0#1.offset| 8)) |c_ULTIMATE.start_main_~x~0#1.base|) (= (select .cse1 8) |c_ULTIMATE.start_main_~head~0#1.base|))) is different from false [2023-11-21 22:08:02,238 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#valid| |c_ULTIMATE.start_main_~x~0#1.base|)) (.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~head~0#1.base|)) (.cse6 (select |c_#valid| |c_ULTIMATE.start_main_~head~0#1.base|)) (.cse7 (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~head~0#1.offset| 12)) (.cse5 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|)) (.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~head~0#1.base|))) (and (= .cse0 1) (forall ((v_ArrVal_1037 (Array Int Int))) (not (= 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_1037) |c_ULTIMATE.start_main_~head~0#1.base|) .cse1)))) (= |c_ULTIMATE.start_main_~head~0#1.offset| 0) (not (= |c_ULTIMATE.start_main_~head~0#1.base| |c_ULTIMATE.start_main_~x~0#1.base|)) (= (select .cse2 (+ |c_ULTIMATE.start_main_~head~0#1.offset| 8)) |c_ULTIMATE.start_main_~head~0#1.base|) (forall ((|v_ULTIMATE.start_main_~x~0#1.offset_99| Int)) (or (forall ((|v_ULTIMATE.start_main_#t~malloc7#1.base_15| Int)) (or (= |v_ULTIMATE.start_main_#t~malloc7#1.base_15| |c_ULTIMATE.start_main_~head~0#1.base|) (forall ((v_ArrVal_1031 Int) (v_ArrVal_1037 (Array Int Int))) (not (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~head~0#1.base| (store .cse3 |v_ULTIMATE.start_main_~x~0#1.offset_99| v_ArrVal_1031)) |v_ULTIMATE.start_main_#t~malloc7#1.base_15| v_ArrVal_1037) |c_ULTIMATE.start_main_~head~0#1.base|) .cse1) 2))) (not (= (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc7#1.base_15|) 0)))) (< |c_ULTIMATE.start_main_~head~0#1.offset| |v_ULTIMATE.start_main_~x~0#1.offset_99|))) (or (not (= .cse0 0)) (forall ((v_ArrVal_1037 (Array Int Int)) (v_arrayElimCell_24 Int) (v_ArrVal_1033 (Array Int Int))) (not (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_1033) v_arrayElimCell_24 v_ArrVal_1037) |c_ULTIMATE.start_main_~head~0#1.base|) .cse1) 2)))) (not (= 2 (select .cse3 .cse1))) (forall ((v_ArrVal_1037 (Array Int Int)) (v_ArrVal_1034 (Array Int Int)) (v_ArrVal_1033 (Array Int Int))) (not (= (select (select (let ((.cse4 (select .cse5 |c_ULTIMATE.start_main_~x~0#1.offset|))) (store (store |c_#memory_int| .cse4 v_ArrVal_1033) (select (select (store |c_#memory_$Pointer$.base| .cse4 v_ArrVal_1034) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_1037)) |c_ULTIMATE.start_main_~head~0#1.base|) .cse1) 2))) (= .cse6 1) (not (= 2 (select .cse7 (+ |c_ULTIMATE.start_main_~x~0#1.offset| 12)))) (or (forall ((v_ArrVal_1037 (Array Int Int)) (v_arrayElimCell_24 Int) (v_ArrVal_1033 (Array Int Int))) (not (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~head~0#1.base| v_ArrVal_1033) v_arrayElimCell_24 v_ArrVal_1037) |c_ULTIMATE.start_main_~head~0#1.base|) .cse1) 2))) (not (= .cse6 0))) (forall ((|v_ULTIMATE.start_main_#t~malloc7#1.base_15| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc7#1.base_15|) 0)) (= |v_ULTIMATE.start_main_#t~malloc7#1.base_15| |c_ULTIMATE.start_main_~x~0#1.base|) (forall ((v_ArrVal_1031 Int) (v_ArrVal_1037 (Array Int Int))) (not (= 2 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~x~0#1.offset| v_ArrVal_1031)) |v_ULTIMATE.start_main_#t~malloc7#1.base_15| v_ArrVal_1037) |c_ULTIMATE.start_main_~head~0#1.base|) .cse1)))))) (= (select .cse5 (+ |c_ULTIMATE.start_main_~x~0#1.offset| 8)) |c_ULTIMATE.start_main_~x~0#1.base|) (= (select .cse2 8) |c_ULTIMATE.start_main_~head~0#1.base|))) is different from false [2023-11-21 22:08:04,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:08:04,184 INFO L93 Difference]: Finished difference Result 585 states and 660 transitions. [2023-11-21 22:08:04,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-21 22:08:04,184 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-11-21 22:08:04,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:08:04,188 INFO L225 Difference]: With dead ends: 585 [2023-11-21 22:08:04,188 INFO L226 Difference]: Without dead ends: 585 [2023-11-21 22:08:04,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1082, Invalid=4776, Unknown=14, NotChecked=770, Total=6642 [2023-11-21 22:08:04,192 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 1084 mSDsluCounter, 1215 mSDsCounter, 0 mSdLazyCounter, 1592 mSolverCounterSat, 281 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1084 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 3404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 1592 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 1527 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:08:04,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1084 Valid, 1275 Invalid, 3404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 1592 Invalid, 4 Unknown, 1527 Unchecked, 2.1s Time] [2023-11-21 22:08:04,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2023-11-21 22:08:04,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 211. [2023-11-21 22:08:04,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 190 states have (on average 1.305263157894737) internal successors, (248), 210 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:08:04,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 248 transitions. [2023-11-21 22:08:04,201 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 248 transitions. Word has length 30 [2023-11-21 22:08:04,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:08:04,201 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 248 transitions. [2023-11-21 22:08:04,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:08:04,201 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 248 transitions. [2023-11-21 22:08:04,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-21 22:08:04,202 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:08:04,202 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] [2023-11-21 22:08:04,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:08:04,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-21 22:08:04,424 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:08:04,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:08:04,424 INFO L85 PathProgramCache]: Analyzing trace with hash -293511794, now seen corresponding path program 1 times [2023-11-21 22:08:04,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:08:04,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22481884] [2023-11-21 22:08:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:08:04,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:08:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:08:04,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:08:04,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:08:04,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22481884] [2023-11-21 22:08:04,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22481884] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:08:04,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:08:04,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 22:08:04,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758139306] [2023-11-21 22:08:04,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:08:04,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 22:08:04,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:08:04,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 22:08:04,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:08:04,748 INFO L87 Difference]: Start difference. First operand 211 states and 248 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:08:05,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:08:05,191 INFO L93 Difference]: Finished difference Result 225 states and 256 transitions. [2023-11-21 22:08:05,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 22:08:05,192 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-21 22:08:05,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:08:05,193 INFO L225 Difference]: With dead ends: 225 [2023-11-21 22:08:05,193 INFO L226 Difference]: Without dead ends: 221 [2023-11-21 22:08:05,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-11-21 22:08:05,194 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 135 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:08:05,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 247 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:08:05,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-11-21 22:08:05,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 208. [2023-11-21 22:08:05,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 187 states have (on average 1.304812834224599) internal successors, (244), 207 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:08:05,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 244 transitions. [2023-11-21 22:08:05,201 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 244 transitions. Word has length 31 [2023-11-21 22:08:05,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:08:05,201 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 244 transitions. [2023-11-21 22:08:05,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:08:05,202 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 244 transitions. [2023-11-21 22:08:05,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-21 22:08:05,202 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:08:05,202 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:08:05,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-11-21 22:08:05,203 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-21 22:08:05,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:08:05,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1549760500, now seen corresponding path program 1 times [2023-11-21 22:08:05,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:08:05,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534421778] [2023-11-21 22:08:05,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:08:05,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:08:05,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:08:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:08:06,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:08:06,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534421778] [2023-11-21 22:08:06,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534421778] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:08:06,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903614284] [2023-11-21 22:08:06,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:08:06,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:08:06,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:08:06,136 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:08:06,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7bf5f3-ee6c-43eb-bc95-1202716ebef5/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:08:06,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:08:06,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-21 22:08:06,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:08:06,362 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 22:08:06,399 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-21 22:08:06,399 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 17 treesize of output 21 [2023-11-21 22:08:06,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-21 22:08:06,500 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-21 22:08:06,501 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 34 treesize of output 33 [2023-11-21 22:08:06,640 INFO L349 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2023-11-21 22:08:06,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 36 [2023-11-21 22:08:06,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:08:06,734 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 45 treesize of output 25 [2023-11-21 22:08:06,917 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-21 22:08:06,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 63 treesize of output 54 [2023-11-21 22:08:07,128 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-21 22:08:07,128 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 62 treesize of output 45 [2023-11-21 22:08:07,234 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-21 22:08:07,236 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 62 treesize of output 45 [2023-11-21 22:08:07,276 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-21 22:08:07,276 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 63 treesize of output 54 [2023-11-21 22:08:07,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:08:07,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 26 [2023-11-21 22:08:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:08:07,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:08:07,762 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1214 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_1214) |c_ULTIMATE.start_main_~head~0#1.base|) (+ |c_ULTIMATE.start_main_~head~0#1.offset| 8))) 1)) is different from false [2023-11-21 22:08:07,998 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1214 (Array Int Int)) (v_ArrVal_1211 (Array Int Int)) (|v_ULTIMATE.start_main_#t~malloc7#1.base_17| Int)) (or (= (select (store |c_#valid| |v_ULTIMATE.start_main_#t~malloc7#1.base_17| 1) (select (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset| |v_ULTIMATE.start_main_#t~malloc7#1.base_17|)) |v_ULTIMATE.start_main_#t~malloc7#1.base_17| v_ArrVal_1211))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_1214)) |c_ULTIMATE.start_main_~head~0#1.base|) (+ |c_ULTIMATE.start_main_~head~0#1.offset| 8))) 1) (not (= (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc7#1.base_17|) 0)))) is different from false [2023-11-21 22:08:08,049 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1214 (Array Int Int)) (v_ArrVal_1211 (Array Int Int)) (|v_ULTIMATE.start_main_#t~malloc7#1.base_17| Int) (|v_ULTIMATE.start_main_~x~0#1.offset_102| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc7#1.base_17|) 0)) (< |c_ULTIMATE.start_main_~head~0#1.offset| |v_ULTIMATE.start_main_~x~0#1.offset_102|) (= (select (store |c_#valid| |v_ULTIMATE.start_main_#t~malloc7#1.base_17| 1) (select (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_102| |v_ULTIMATE.start_main_#t~malloc7#1.base_17|)) |v_ULTIMATE.start_main_#t~malloc7#1.base_17| v_ArrVal_1211))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_102|) v_ArrVal_1214)) |c_ULTIMATE.start_main_~head~0#1.base|) (+ |c_ULTIMATE.start_main_~head~0#1.offset| 8))) 1))) is different from false [2023-11-21 22:08:08,069 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1207 (Array Int Int)) (v_ArrVal_1214 (Array Int Int)) (v_ArrVal_1211 (Array Int Int)) (|v_ULTIMATE.start_main_#t~malloc7#1.base_17| Int) (|v_ULTIMATE.start_main_~x~0#1.offset_102| Int)) (or (= (select (store |c_#valid| |v_ULTIMATE.start_main_#t~malloc7#1.base_17| 1) (select (select (let ((.cse0 (store (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1207))) (store .cse1 |c_ULTIMATE.start_main_~head~0#1.base| (store (select .cse1 |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_102| |v_ULTIMATE.start_main_#t~malloc7#1.base_17|))) |v_ULTIMATE.start_main_#t~malloc7#1.base_17| v_ArrVal_1211))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_102|) v_ArrVal_1214)) |c_ULTIMATE.start_main_~head~0#1.base|) (+ |c_ULTIMATE.start_main_~head~0#1.offset| 8))) 1) (not (= (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc7#1.base_17|) 0)) (< |c_ULTIMATE.start_main_~head~0#1.offset| |v_ULTIMATE.start_main_~x~0#1.offset_102|))) is different from false [2023-11-21 22:08:08,161 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:08:08,167 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:08:08,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 52 [2023-11-21 22:08:08,173 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 58 treesize of output 54 [2023-11-21 22:08:08,178 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:08:08,181 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 51 treesize of output 43 [2023-11-21 22:08:08,186 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:08:08,189 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 35 treesize of output 31 [2023-11-21 22:08:08,196 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 16 treesize of output 12 [2023-11-21 22:08:10,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-21 22:08:10,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903614284] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:08:10,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:08:10,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 35 [2023-11-21 22:08:10,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474823008] [2023-11-21 22:08:10,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:08:10,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-21 22:08:10,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:08:10,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-21 22:08:10,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=873, Unknown=11, NotChecked=260, Total=1332 [2023-11-21 22:08:10,463 INFO L87 Difference]: Start difference. First operand 208 states and 244 transitions. Second operand has 37 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)