./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-broom/sll.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/sll.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash fca5cc24d72663534ebec1f9dc14e35435ad722dffdf26757e6dcfe47c5f2a9e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:56:57,331 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:56:57,406 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2023-11-26 11:56:57,412 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:56:57,413 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:56:57,441 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:56:57,441 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:56:57,442 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:56:57,443 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:56:57,444 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:56:57,445 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:56:57,446 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:56:57,447 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:56:57,447 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:56:57,448 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:56:57,449 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:56:57,450 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:56:57,450 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:56:57,451 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:56:57,452 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:56:57,452 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:56:57,453 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:56:57,454 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:56:57,454 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:56:57,455 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:56:57,456 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:56:57,456 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:56:57,457 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:56:57,457 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:56:57,458 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:56:57,459 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:56:57,459 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:56:57,460 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:56:57,460 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:56:57,461 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:56:57,461 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:56:57,462 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:56:57,462 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:56:57,463 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_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fca5cc24d72663534ebec1f9dc14e35435ad722dffdf26757e6dcfe47c5f2a9e [2023-11-26 11:56:57,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:56:57,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:56:57,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:56:57,776 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:56:57,777 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:56:57,779 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/memsafety-broom/sll.i [2023-11-26 11:57:00,893 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:57:01,193 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:57:01,194 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/sv-benchmarks/c/memsafety-broom/sll.i [2023-11-26 11:57:01,241 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/data/3da7f9e4a/d1b89ce1b9e7476199d15338978111fc/FLAG715439ecc [2023-11-26 11:57:01,262 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/data/3da7f9e4a/d1b89ce1b9e7476199d15338978111fc [2023-11-26 11:57:01,271 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:57:01,277 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:57:01,278 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:57:01,278 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:57:01,284 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:57:01,285 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:57:01" (1/1) ... [2023-11-26 11:57:01,286 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bd53972 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:01, skipping insertion in model container [2023-11-26 11:57:01,286 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:57:01" (1/1) ... [2023-11-26 11:57:01,376 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:57:01,713 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:57:01,728 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:57:01,812 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:57:01,842 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:57:01,842 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:01 WrapperNode [2023-11-26 11:57:01,842 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:57:01,843 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:57:01,844 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:57:01,844 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:57:01,851 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:01" (1/1) ... [2023-11-26 11:57:01,866 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:01" (1/1) ... [2023-11-26 11:57:01,888 INFO L138 Inliner]: procedures = 118, calls = 14, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 54 [2023-11-26 11:57:01,888 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:57:01,889 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:57:01,889 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:57:01,890 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:57:01,902 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:01" (1/1) ... [2023-11-26 11:57:01,902 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:01" (1/1) ... [2023-11-26 11:57:01,906 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:01" (1/1) ... [2023-11-26 11:57:01,926 INFO L175 MemorySlicer]: Split 5 memory accesses to 1 slices as follows [5]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 2 writes are split as follows [2]. [2023-11-26 11:57:01,927 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:01" (1/1) ... [2023-11-26 11:57:01,927 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:01" (1/1) ... [2023-11-26 11:57:01,936 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:01" (1/1) ... [2023-11-26 11:57:01,940 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:01" (1/1) ... [2023-11-26 11:57:01,942 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:01" (1/1) ... [2023-11-26 11:57:01,943 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:01" (1/1) ... [2023-11-26 11:57:01,946 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:57:01,947 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:57:01,948 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:57:01,948 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:57:01,949 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:01" (1/1) ... [2023-11-26 11:57:01,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:57:01,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:01,982 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:57:01,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:57:02,015 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2023-11-26 11:57:02,016 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2023-11-26 11:57:02,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:57:02,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-26 11:57:02,017 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-26 11:57:02,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:57:02,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:57:02,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:57:02,126 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:57:02,128 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:57:02,408 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:57:02,474 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:57:02,474 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-26 11:57:02,475 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:57:02 BoogieIcfgContainer [2023-11-26 11:57:02,475 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:57:02,493 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:57:02,493 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:57:02,496 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:57:02,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:57:01" (1/3) ... [2023-11-26 11:57:02,497 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c340d4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:57:02, skipping insertion in model container [2023-11-26 11:57:02,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:01" (2/3) ... [2023-11-26 11:57:02,498 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c340d4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:57:02, skipping insertion in model container [2023-11-26 11:57:02,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:57:02" (3/3) ... [2023-11-26 11:57:02,499 INFO L112 eAbstractionObserver]: Analyzing ICFG sll.i [2023-11-26 11:57:02,517 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:57:02,517 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-11-26 11:57:02,559 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:57:02,567 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;@6648eb7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:57:02,567 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2023-11-26 11:57:02,572 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 33 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:57:02,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-26 11:57:02,580 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:02,581 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-26 11:57:02,581 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-26 11:57:02,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:02,594 INFO L85 PathProgramCache]: Analyzing trace with hash 3651802, now seen corresponding path program 1 times [2023-11-26 11:57:02,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:02,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040853288] [2023-11-26 11:57:02,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:02,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:02,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:02,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:02,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:02,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040853288] [2023-11-26 11:57:02,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040853288] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:02,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:02,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:57:02,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94969361] [2023-11-26 11:57:02,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:02,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:02,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:02,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:02,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:02,990 INFO L87 Difference]: Start difference. First operand has 37 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 33 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:03,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:03,093 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2023-11-26 11:57:03,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:03,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-26 11:57:03,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:03,105 INFO L225 Difference]: With dead ends: 36 [2023-11-26 11:57:03,106 INFO L226 Difference]: Without dead ends: 35 [2023-11-26 11:57:03,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:03,113 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:03,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 50 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:57:03,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-26 11:57:03,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-26 11:57:03,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 31 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:57:03,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2023-11-26 11:57:03,162 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 4 [2023-11-26 11:57:03,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:03,163 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2023-11-26 11:57:03,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:03,163 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2023-11-26 11:57:03,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-26 11:57:03,164 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:03,164 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-26 11:57:03,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:57:03,165 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-26 11:57:03,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:03,166 INFO L85 PathProgramCache]: Analyzing trace with hash 3651803, now seen corresponding path program 1 times [2023-11-26 11:57:03,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:03,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860325517] [2023-11-26 11:57:03,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:03,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:03,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:03,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:03,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860325517] [2023-11-26 11:57:03,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860325517] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:03,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:03,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:57:03,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348160801] [2023-11-26 11:57:03,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:03,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:03,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:03,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:03,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:03,331 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:03,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:03,372 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2023-11-26 11:57:03,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:03,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-26 11:57:03,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:03,375 INFO L225 Difference]: With dead ends: 34 [2023-11-26 11:57:03,375 INFO L226 Difference]: Without dead ends: 34 [2023-11-26 11:57:03,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:03,377 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:03,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 53 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:57:03,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-26 11:57:03,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-11-26 11:57:03,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.736842105263158) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:57:03,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2023-11-26 11:57:03,386 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 4 [2023-11-26 11:57:03,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:03,387 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2023-11-26 11:57:03,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:03,387 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2023-11-26 11:57:03,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-26 11:57:03,388 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:03,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:03,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:57:03,389 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-26 11:57:03,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:03,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1857099663, now seen corresponding path program 1 times [2023-11-26 11:57:03,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:03,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27736769] [2023-11-26 11:57:03,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:03,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:03,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:03,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:57:03,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:03,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:03,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:03,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27736769] [2023-11-26 11:57:03,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27736769] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:03,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:03,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:57:03,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019655058] [2023-11-26 11:57:03,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:03,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:57:03,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:03,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:57:03,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:57:03,755 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 7 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:57:03,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:03,952 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2023-11-26 11:57:03,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:57:03,953 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-26 11:57:03,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:03,956 INFO L225 Difference]: With dead ends: 42 [2023-11-26 11:57:03,956 INFO L226 Difference]: Without dead ends: 42 [2023-11-26 11:57:03,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:57:03,958 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:03,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 95 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:57:03,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-26 11:57:03,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2023-11-26 11:57:03,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 35 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:57:03,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2023-11-26 11:57:03,969 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 11 [2023-11-26 11:57:03,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:03,969 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2023-11-26 11:57:03,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:57:03,970 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2023-11-26 11:57:03,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-26 11:57:03,971 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:03,971 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:03,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:57:03,971 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-26 11:57:03,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:03,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1857099664, now seen corresponding path program 1 times [2023-11-26 11:57:03,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:03,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543578353] [2023-11-26 11:57:03,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:03,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:03,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:04,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:57:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:04,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:04,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:04,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543578353] [2023-11-26 11:57:04,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543578353] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:04,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:04,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 11:57:04,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106394308] [2023-11-26 11:57:04,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:04,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:57:04,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:04,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:57:04,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:57:04,432 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:57:04,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:04,584 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2023-11-26 11:57:04,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:57:04,585 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-26 11:57:04,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:04,586 INFO L225 Difference]: With dead ends: 41 [2023-11-26 11:57:04,586 INFO L226 Difference]: Without dead ends: 41 [2023-11-26 11:57:04,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:57:04,589 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:04,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 130 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:57:04,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-26 11:57:04,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2023-11-26 11:57:04,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 35 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:57:04,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2023-11-26 11:57:04,597 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 11 [2023-11-26 11:57:04,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:04,597 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2023-11-26 11:57:04,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:57:04,598 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2023-11-26 11:57:04,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-26 11:57:04,599 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:04,599 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:04,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:57:04,600 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-26 11:57:04,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:04,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1981325504, now seen corresponding path program 1 times [2023-11-26 11:57:04,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:04,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951420628] [2023-11-26 11:57:04,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:04,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:04,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:04,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:57:04,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:04,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-26 11:57:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:04,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:57:04,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:04,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951420628] [2023-11-26 11:57:04,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951420628] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:04,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443272713] [2023-11-26 11:57:04,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:04,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:04,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:04,969 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:04,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:57:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:05,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 11:57:05,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:05,120 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 [2023-11-26 11:57:05,206 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2023-11-26 11:57:05,256 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-26 11:57:05,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-26 11:57:05,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-26 11:57:05,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:05,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443272713] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:05,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:57:05,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2023-11-26 11:57:05,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347529011] [2023-11-26 11:57:05,357 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:05,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:57:05,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:05,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:57:05,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=87, Unknown=1, NotChecked=18, Total=132 [2023-11-26 11:57:05,362 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 11 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:57:05,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:05,555 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2023-11-26 11:57:05,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:57:05,556 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 13 [2023-11-26 11:57:05,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:05,557 INFO L225 Difference]: With dead ends: 41 [2023-11-26 11:57:05,557 INFO L226 Difference]: Without dead ends: 41 [2023-11-26 11:57:05,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2023-11-26 11:57:05,560 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:05,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 118 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 123 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2023-11-26 11:57:05,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-26 11:57:05,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2023-11-26 11:57:05,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.64) internal successors, (41), 35 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:57:05,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2023-11-26 11:57:05,582 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 13 [2023-11-26 11:57:05,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:05,583 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2023-11-26 11:57:05,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:57:05,583 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2023-11-26 11:57:05,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-26 11:57:05,585 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:05,585 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:05,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:05,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:05,802 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-26 11:57:05,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:05,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1981325503, now seen corresponding path program 1 times [2023-11-26 11:57:05,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:05,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976114778] [2023-11-26 11:57:05,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:05,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:06,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:57:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:06,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-26 11:57:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:06,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:57:06,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:06,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976114778] [2023-11-26 11:57:06,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976114778] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:06,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119365086] [2023-11-26 11:57:06,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:06,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:06,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:06,223 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:06,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:57:06,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:06,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-26 11:57:06,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:06,347 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 8 treesize of output 1 [2023-11-26 11:57:06,351 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 [2023-11-26 11:57:06,578 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2023-11-26 11:57:06,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:06,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 11:57:06,655 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 11:57:06,656 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 [2023-11-26 11:57:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-26 11:57:06,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:06,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119365086] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:06,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:57:06,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-26 11:57:06,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486929867] [2023-11-26 11:57:06,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:06,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 11:57:06,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:06,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 11:57:06,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=232, Unknown=1, NotChecked=30, Total=306 [2023-11-26 11:57:06,865 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 16 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 11:57:07,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:07,190 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2023-11-26 11:57:07,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:57:07,191 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 13 [2023-11-26 11:57:07,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:07,192 INFO L225 Difference]: With dead ends: 41 [2023-11-26 11:57:07,192 INFO L226 Difference]: Without dead ends: 41 [2023-11-26 11:57:07,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=354, Unknown=1, NotChecked=38, Total=462 [2023-11-26 11:57:07,194 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:07,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 193 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 189 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2023-11-26 11:57:07,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-26 11:57:07,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-11-26 11:57:07,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 36 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:57:07,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2023-11-26 11:57:07,199 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 13 [2023-11-26 11:57:07,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:07,200 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2023-11-26 11:57:07,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 11:57:07,201 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2023-11-26 11:57:07,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-26 11:57:07,202 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:07,202 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:07,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:07,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:07,403 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-26 11:57:07,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:07,403 INFO L85 PathProgramCache]: Analyzing trace with hash -2033670854, now seen corresponding path program 1 times [2023-11-26 11:57:07,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:07,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347414248] [2023-11-26 11:57:07,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:07,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:07,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:07,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:57:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:07,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:07,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:07,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347414248] [2023-11-26 11:57:07,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347414248] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:07,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:07,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:57:07,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602081094] [2023-11-26 11:57:07,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:07,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:57:07,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:07,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:57:07,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:57:07,584 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:57:07,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:07,675 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2023-11-26 11:57:07,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:57:07,676 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-11-26 11:57:07,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:07,677 INFO L225 Difference]: With dead ends: 45 [2023-11-26 11:57:07,677 INFO L226 Difference]: Without dead ends: 45 [2023-11-26 11:57:07,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:57:07,679 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 10 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:07,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 158 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:57:07,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-26 11:57:07,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2023-11-26 11:57:07,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 37 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:57:07,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2023-11-26 11:57:07,685 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 13 [2023-11-26 11:57:07,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:07,685 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2023-11-26 11:57:07,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:57:07,686 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2023-11-26 11:57:07,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-26 11:57:07,686 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:07,687 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:07,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 11:57:07,687 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-26 11:57:07,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:07,688 INFO L85 PathProgramCache]: Analyzing trace with hash -2033578182, now seen corresponding path program 1 times [2023-11-26 11:57:07,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:07,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916956429] [2023-11-26 11:57:07,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:07,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:07,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:07,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:57:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:08,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:08,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916956429] [2023-11-26 11:57:08,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916956429] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:08,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478279601] [2023-11-26 11:57:08,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:08,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:08,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:08,025 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:08,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:57:08,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:08,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-26 11:57:08,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:08,137 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 [2023-11-26 11:57:08,145 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 [2023-11-26 11:57:08,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:08,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:08,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:08,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478279601] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:08,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:57:08,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2023-11-26 11:57:08,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684075904] [2023-11-26 11:57:08,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:08,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 11:57:08,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:08,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 11:57:08,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:57:08,439 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 11:57:08,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:08,590 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2023-11-26 11:57:08,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:57:08,591 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2023-11-26 11:57:08,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:08,592 INFO L225 Difference]: With dead ends: 43 [2023-11-26 11:57:08,593 INFO L226 Difference]: Without dead ends: 43 [2023-11-26 11:57:08,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:57:08,595 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:08,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 209 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:57:08,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-26 11:57:08,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-11-26 11:57:08,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.5) internal successors, (42), 38 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:57:08,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2023-11-26 11:57:08,602 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 13 [2023-11-26 11:57:08,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:08,603 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2023-11-26 11:57:08,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 11:57:08,605 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2023-11-26 11:57:08,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-26 11:57:08,606 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:08,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:08,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:08,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:08,818 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-26 11:57:08,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:08,819 INFO L85 PathProgramCache]: Analyzing trace with hash -58565083, now seen corresponding path program 1 times [2023-11-26 11:57:08,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:08,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417983376] [2023-11-26 11:57:08,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:08,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:08,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:09,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:57:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:57:09,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:09,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417983376] [2023-11-26 11:57:09,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417983376] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:09,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:09,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:57:09,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475083727] [2023-11-26 11:57:09,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:09,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:57:09,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:09,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:57:09,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:57:09,108 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:57:09,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:09,322 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2023-11-26 11:57:09,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:57:09,323 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-26 11:57:09,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:09,324 INFO L225 Difference]: With dead ends: 66 [2023-11-26 11:57:09,324 INFO L226 Difference]: Without dead ends: 66 [2023-11-26 11:57:09,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:57:09,325 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 33 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:09,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 96 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:57:09,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-26 11:57:09,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 47. [2023-11-26 11:57:09,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.5) internal successors, (48), 42 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:57:09,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2023-11-26 11:57:09,335 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 15 [2023-11-26 11:57:09,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:09,336 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2023-11-26 11:57:09,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:57:09,336 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2023-11-26 11:57:09,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-26 11:57:09,337 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:09,337 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:09,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 11:57:09,338 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-26 11:57:09,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:09,338 INFO L85 PathProgramCache]: Analyzing trace with hash -58565084, now seen corresponding path program 1 times [2023-11-26 11:57:09,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:09,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081486992] [2023-11-26 11:57:09,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:09,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:09,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:57:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:09,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:57:09,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:09,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081486992] [2023-11-26 11:57:09,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081486992] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:09,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:09,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 11:57:09,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008013337] [2023-11-26 11:57:09,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:09,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:57:09,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:09,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:57:09,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:57:09,483 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:57:09,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:09,616 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2023-11-26 11:57:09,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:57:09,616 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-26 11:57:09,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:09,617 INFO L225 Difference]: With dead ends: 52 [2023-11-26 11:57:09,617 INFO L226 Difference]: Without dead ends: 52 [2023-11-26 11:57:09,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:57:09,618 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 19 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:09,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 90 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:57:09,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-26 11:57:09,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2023-11-26 11:57:09,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.4375) internal successors, (46), 41 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:57:09,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2023-11-26 11:57:09,638 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 15 [2023-11-26 11:57:09,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:09,639 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2023-11-26 11:57:09,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:57:09,639 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2023-11-26 11:57:09,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-26 11:57:09,641 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:09,641 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:09,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 11:57:09,642 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-26 11:57:09,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:09,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1815519077, now seen corresponding path program 1 times [2023-11-26 11:57:09,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:09,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909101946] [2023-11-26 11:57:09,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:09,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:09,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:57:09,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:57:09,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:09,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909101946] [2023-11-26 11:57:09,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909101946] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:09,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:09,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 11:57:09,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421510678] [2023-11-26 11:57:09,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:09,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:57:09,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:09,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:57:09,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:57:09,771 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:57:09,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:09,898 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2023-11-26 11:57:09,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:57:09,899 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-26 11:57:09,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:09,900 INFO L225 Difference]: With dead ends: 55 [2023-11-26 11:57:09,900 INFO L226 Difference]: Without dead ends: 55 [2023-11-26 11:57:09,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:57:09,901 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 36 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:09,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 141 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:57:09,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-26 11:57:09,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2023-11-26 11:57:09,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.393939393939394) internal successors, (46), 42 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:57:09,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2023-11-26 11:57:09,908 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 16 [2023-11-26 11:57:09,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:09,909 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2023-11-26 11:57:09,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:57:09,909 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2023-11-26 11:57:09,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-26 11:57:09,910 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:09,911 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:09,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 11:57:09,911 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-26 11:57:09,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:09,912 INFO L85 PathProgramCache]: Analyzing trace with hash -446441823, now seen corresponding path program 1 times [2023-11-26 11:57:09,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:09,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309444170] [2023-11-26 11:57:09,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:09,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:10,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:57:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:10,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:57:10,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:10,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309444170] [2023-11-26 11:57:10,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309444170] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:10,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:10,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:57:10,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4454929] [2023-11-26 11:57:10,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:10,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:57:10,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:10,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:57:10,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:57:10,099 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:57:10,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:10,254 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2023-11-26 11:57:10,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:57:10,255 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-11-26 11:57:10,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:10,255 INFO L225 Difference]: With dead ends: 53 [2023-11-26 11:57:10,256 INFO L226 Difference]: Without dead ends: 53 [2023-11-26 11:57:10,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:57:10,257 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 30 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:10,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 123 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:57:10,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-26 11:57:10,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2023-11-26 11:57:10,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 45 states have internal predecessors, (52), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:57:10,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2023-11-26 11:57:10,261 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 17 [2023-11-26 11:57:10,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:10,261 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2023-11-26 11:57:10,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:57:10,261 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2023-11-26 11:57:10,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-26 11:57:10,262 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:10,262 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:10,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 11:57:10,263 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-26 11:57:10,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:10,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1018677758, now seen corresponding path program 1 times [2023-11-26 11:57:10,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:10,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447881187] [2023-11-26 11:57:10,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:10,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:10,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:10,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:57:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:10,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-26 11:57:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:10,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:57:10,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:10,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447881187] [2023-11-26 11:57:10,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447881187] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:10,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791584154] [2023-11-26 11:57:10,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:10,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:10,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:10,380 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:10,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:57:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:10,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-26 11:57:10,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:10,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:57:10,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:10,537 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-26 11:57:10,538 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 12 treesize of output 11 [2023-11-26 11:57:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:57:10,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791584154] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:10,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:57:10,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 6 [2023-11-26 11:57:10,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532822980] [2023-11-26 11:57:10,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:10,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:57:10,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:10,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:57:10,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:57:10,557 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:57:10,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:10,644 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2023-11-26 11:57:10,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:57:10,645 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-11-26 11:57:10,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:10,646 INFO L225 Difference]: With dead ends: 57 [2023-11-26 11:57:10,646 INFO L226 Difference]: Without dead ends: 57 [2023-11-26 11:57:10,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:57:10,647 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 3 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:10,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 117 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:57:10,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-26 11:57:10,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2023-11-26 11:57:10,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 50 states have internal predecessors, (59), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:57:10,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2023-11-26 11:57:10,652 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 19 [2023-11-26 11:57:10,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:10,652 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2023-11-26 11:57:10,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:57:10,653 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2023-11-26 11:57:10,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-26 11:57:10,654 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:10,654 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:10,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:10,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 11:57:10,861 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-26 11:57:10,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:10,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1018677757, now seen corresponding path program 1 times [2023-11-26 11:57:10,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:10,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359782907] [2023-11-26 11:57:10,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:10,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:11,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:57:11,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:11,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-26 11:57:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:11,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:57:11,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:11,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359782907] [2023-11-26 11:57:11,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359782907] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:11,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50495849] [2023-11-26 11:57:11,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:11,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:11,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:11,137 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:11,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:57:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:11,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-26 11:57:11,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:57:11,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:11,444 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:57:11,445 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 17 treesize of output 21 [2023-11-26 11:57:11,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:57:11,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50495849] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:11,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:57:11,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 12 [2023-11-26 11:57:11,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678036754] [2023-11-26 11:57:11,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:11,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 11:57:11,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:11,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 11:57:11,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:57:11,520 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 13 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:57:11,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:11,639 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2023-11-26 11:57:11,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:57:11,640 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 19 [2023-11-26 11:57:11,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:11,640 INFO L225 Difference]: With dead ends: 56 [2023-11-26 11:57:11,641 INFO L226 Difference]: Without dead ends: 56 [2023-11-26 11:57:11,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:57:11,642 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:11,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 231 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:57:11,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-26 11:57:11,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2023-11-26 11:57:11,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 50 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:57:11,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2023-11-26 11:57:11,646 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 19 [2023-11-26 11:57:11,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:11,647 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2023-11-26 11:57:11,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:57:11,647 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2023-11-26 11:57:11,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-26 11:57:11,648 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:11,649 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:11,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:11,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 11:57:11,861 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-26 11:57:11,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:11,861 INFO L85 PathProgramCache]: Analyzing trace with hash 355511539, now seen corresponding path program 1 times [2023-11-26 11:57:11,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:11,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002334881] [2023-11-26 11:57:11,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:11,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:12,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:57:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:12,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-26 11:57:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:12,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-26 11:57:12,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:57:12,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:12,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002334881] [2023-11-26 11:57:12,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002334881] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:12,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081143025] [2023-11-26 11:57:12,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:12,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:12,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:12,159 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:12,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:57:12,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:12,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 11:57:12,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:12,298 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 [2023-11-26 11:57:12,326 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 15 treesize of output 1 [2023-11-26 11:57:12,337 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 17 treesize of output 9 [2023-11-26 11:57:12,366 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2023-11-26 11:57:12,398 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-26 11:57:12,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-26 11:57:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-11-26 11:57:12,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:12,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081143025] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:12,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:57:12,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-11-26 11:57:12,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093864540] [2023-11-26 11:57:12,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:12,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:57:12,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:12,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:57:12,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=107, Unknown=1, NotChecked=20, Total=156 [2023-11-26 11:57:12,465 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 11:57:12,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:12,675 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2023-11-26 11:57:12,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:57:12,676 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2023-11-26 11:57:12,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:12,677 INFO L225 Difference]: With dead ends: 54 [2023-11-26 11:57:12,677 INFO L226 Difference]: Without dead ends: 54 [2023-11-26 11:57:12,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=193, Unknown=1, NotChecked=28, Total=272 [2023-11-26 11:57:12,678 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:12,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 185 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2023-11-26 11:57:12,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-26 11:57:12,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-11-26 11:57:12,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 49 states have internal predecessors, (57), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:57:12,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2023-11-26 11:57:12,681 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 21 [2023-11-26 11:57:12,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:12,682 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2023-11-26 11:57:12,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 11:57:12,682 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2023-11-26 11:57:12,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-26 11:57:12,683 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:12,683 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:12,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:12,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 11:57:12,884 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-26 11:57:12,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:12,884 INFO L85 PathProgramCache]: Analyzing trace with hash 355511540, now seen corresponding path program 1 times [2023-11-26 11:57:12,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:12,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808915877] [2023-11-26 11:57:12,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:12,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:13,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:57:13,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:13,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-26 11:57:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:13,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-26 11:57:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:13,311 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:57:13,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:13,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808915877] [2023-11-26 11:57:13,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808915877] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:13,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697621274] [2023-11-26 11:57:13,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:13,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:13,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:13,314 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:13,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:57:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:13,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-26 11:57:13,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:13,452 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 [2023-11-26 11:57:13,462 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 8 treesize of output 1 [2023-11-26 11:57:13,558 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 15 treesize of output 1 [2023-11-26 11:57:13,566 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 [2023-11-26 11:57:13,617 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 26 treesize of output 14 [2023-11-26 11:57:13,711 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2023-11-26 11:57:13,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:13,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 11:57:13,747 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 11:57:13,750 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 [2023-11-26 11:57:13,775 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-11-26 11:57:13,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:13,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697621274] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:13,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:57:13,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2023-11-26 11:57:13,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71658496] [2023-11-26 11:57:13,916 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:13,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-26 11:57:13,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:13,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-26 11:57:13,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=326, Unknown=1, NotChecked=36, Total=420 [2023-11-26 11:57:13,917 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 19 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-26 11:57:14,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:14,238 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2023-11-26 11:57:14,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:57:14,239 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 21 [2023-11-26 11:57:14,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:14,239 INFO L225 Difference]: With dead ends: 52 [2023-11-26 11:57:14,240 INFO L226 Difference]: Without dead ends: 52 [2023-11-26 11:57:14,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=466, Unknown=1, NotChecked=44, Total=600 [2023-11-26 11:57:14,241 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:14,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 220 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 197 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2023-11-26 11:57:14,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-26 11:57:14,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-11-26 11:57:14,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 47 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:57:14,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2023-11-26 11:57:14,244 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 21 [2023-11-26 11:57:14,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:14,245 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2023-11-26 11:57:14,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-26 11:57:14,245 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2023-11-26 11:57:14,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-26 11:57:14,246 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:14,246 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:14,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:14,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-26 11:57:14,447 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-26 11:57:14,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:14,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1565466696, now seen corresponding path program 1 times [2023-11-26 11:57:14,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:14,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089529303] [2023-11-26 11:57:14,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:14,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:14,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:57:14,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:14,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:14,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089529303] [2023-11-26 11:57:14,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089529303] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:14,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465883778] [2023-11-26 11:57:14,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:14,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:14,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:14,649 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:14,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:57:14,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:14,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-26 11:57:14,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:14,787 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 [2023-11-26 11:57:14,791 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 [2023-11-26 11:57:14,984 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:57:14,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-26 11:57:15,000 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:57:15,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-26 11:57:15,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:57:15,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:15,219 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 [2023-11-26 11:57:15,223 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 [2023-11-26 11:57:15,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:57:15,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465883778] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:15,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:57:15,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 17 [2023-11-26 11:57:15,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797170178] [2023-11-26 11:57:15,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:15,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-26 11:57:15,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:15,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-26 11:57:15,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2023-11-26 11:57:15,228 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 11:57:15,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:15,880 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2023-11-26 11:57:15,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-26 11:57:15,880 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-11-26 11:57:15,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:15,881 INFO L225 Difference]: With dead ends: 78 [2023-11-26 11:57:15,881 INFO L226 Difference]: Without dead ends: 78 [2023-11-26 11:57:15,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2023-11-26 11:57:15,883 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 60 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:15,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 137 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:57:15,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-26 11:57:15,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 61. [2023-11-26 11:57:15,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 50 states have (on average 1.4) internal successors, (70), 56 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:57:15,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2023-11-26 11:57:15,886 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 20 [2023-11-26 11:57:15,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:15,887 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2023-11-26 11:57:15,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 11:57:15,887 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2023-11-26 11:57:15,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-26 11:57:15,888 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:15,888 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:15,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:16,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-26 11:57:16,094 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-26 11:57:16,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:16,095 INFO L85 PathProgramCache]: Analyzing trace with hash 303258861, now seen corresponding path program 1 times [2023-11-26 11:57:16,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:16,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48179154] [2023-11-26 11:57:16,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:16,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:16,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:57:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:16,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-26 11:57:16,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:57:16,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:16,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48179154] [2023-11-26 11:57:16,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48179154] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:16,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958534803] [2023-11-26 11:57:16,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:16,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:16,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:16,344 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:16,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:57:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:16,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-26 11:57:16,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:16,537 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 [2023-11-26 11:57:16,604 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 15 treesize of output 1 [2023-11-26 11:57:16,681 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 17 treesize of output 9 [2023-11-26 11:57:16,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:57:16,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:16,776 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 32 treesize of output 28 [2023-11-26 11:57:16,938 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:57:16,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958534803] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:16,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:57:16,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 8] total 21 [2023-11-26 11:57:16,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878819335] [2023-11-26 11:57:16,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:16,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-26 11:57:16,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:16,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-26 11:57:16,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2023-11-26 11:57:16,941 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand has 22 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 17 states have internal predecessors, (41), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-26 11:57:17,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:17,246 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2023-11-26 11:57:17,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:57:17,246 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 17 states have internal predecessors, (41), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 21 [2023-11-26 11:57:17,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:17,247 INFO L225 Difference]: With dead ends: 66 [2023-11-26 11:57:17,247 INFO L226 Difference]: Without dead ends: 66 [2023-11-26 11:57:17,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2023-11-26 11:57:17,248 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:17,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 359 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:57:17,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-26 11:57:17,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2023-11-26 11:57:17,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.4230769230769231) internal successors, (74), 58 states have internal predecessors, (74), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:57:17,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2023-11-26 11:57:17,253 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 21 [2023-11-26 11:57:17,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:17,253 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2023-11-26 11:57:17,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 17 states have internal predecessors, (41), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-26 11:57:17,254 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2023-11-26 11:57:17,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-26 11:57:17,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:17,257 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:17,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:17,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-26 11:57:17,458 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-26 11:57:17,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:17,459 INFO L85 PathProgramCache]: Analyzing trace with hash 303258862, now seen corresponding path program 1 times [2023-11-26 11:57:17,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:17,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172677220] [2023-11-26 11:57:17,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:17,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:17,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:17,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:57:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:17,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-26 11:57:17,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:57:17,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:17,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172677220] [2023-11-26 11:57:17,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172677220] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:17,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789783312] [2023-11-26 11:57:17,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:17,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:17,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:17,826 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:17,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:57:17,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:17,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-26 11:57:17,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:18,127 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 [2023-11-26 11:57:18,138 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 15 treesize of output 1 [2023-11-26 11:57:18,245 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 17 treesize of output 9 [2023-11-26 11:57:18,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:57:18,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:18,435 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 60 treesize of output 56 [2023-11-26 11:57:18,441 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 90 treesize of output 82 [2023-11-26 11:57:18,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:18,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:18,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-26 11:57:18,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:57:18,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789783312] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:18,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:57:18,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 8] total 27 [2023-11-26 11:57:18,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587087202] [2023-11-26 11:57:18,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:18,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-26 11:57:18,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:18,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-26 11:57:18,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2023-11-26 11:57:18,698 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand has 28 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-26 11:57:19,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:19,049 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2023-11-26 11:57:19,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:57:19,049 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 21 [2023-11-26 11:57:19,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:19,050 INFO L225 Difference]: With dead ends: 65 [2023-11-26 11:57:19,050 INFO L226 Difference]: Without dead ends: 65 [2023-11-26 11:57:19,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2023-11-26 11:57:19,051 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:19,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 331 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:57:19,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-26 11:57:19,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2023-11-26 11:57:19,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 58 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:57:19,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 79 transitions. [2023-11-26 11:57:19,055 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 79 transitions. Word has length 21 [2023-11-26 11:57:19,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:19,055 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 79 transitions. [2023-11-26 11:57:19,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-26 11:57:19,056 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 79 transitions. [2023-11-26 11:57:19,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-26 11:57:19,056 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:19,056 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] [2023-11-26 11:57:19,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:19,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:19,257 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-26 11:57:19,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:19,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1284825816, now seen corresponding path program 1 times [2023-11-26 11:57:19,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:19,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792728572] [2023-11-26 11:57:19,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:19,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:19,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:57:19,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:19,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:57:19,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:19,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792728572] [2023-11-26 11:57:19,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792728572] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:19,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802440657] [2023-11-26 11:57:19,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:19,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:19,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:19,447 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:19,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:57:19,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:19,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-26 11:57:19,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:19,612 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 13 treesize of output 9 [2023-11-26 11:57:19,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:57:19,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:19,715 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_create_#t~ret4#1.base_37| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_37|) 0)) (= (store |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_37| 0) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2023-11-26 11:57:19,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802440657] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:19,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:57:19,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2023-11-26 11:57:19,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866954286] [2023-11-26 11:57:19,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:19,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:57:19,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:19,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:57:19,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=110, Unknown=1, NotChecked=20, Total=156 [2023-11-26 11:57:19,723 INFO L87 Difference]: Start difference. First operand 63 states and 79 transitions. Second operand has 12 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:57:19,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:19,923 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2023-11-26 11:57:19,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 11:57:19,925 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-11-26 11:57:19,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:19,927 INFO L225 Difference]: With dead ends: 68 [2023-11-26 11:57:19,927 INFO L226 Difference]: Without dead ends: 55 [2023-11-26 11:57:19,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=175, Unknown=1, NotChecked=26, Total=240 [2023-11-26 11:57:19,929 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:19,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 123 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:57:19,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-26 11:57:19,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-11-26 11:57:19,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 50 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:57:19,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2023-11-26 11:57:19,938 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 21 [2023-11-26 11:57:19,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:19,938 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2023-11-26 11:57:19,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:57:19,938 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2023-11-26 11:57:19,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-26 11:57:19,939 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:19,939 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:19,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:20,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:20,140 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-26 11:57:20,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:20,140 INFO L85 PathProgramCache]: Analyzing trace with hash -626062568, now seen corresponding path program 1 times [2023-11-26 11:57:20,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:20,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415291902] [2023-11-26 11:57:20,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:20,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:20,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:57:20,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:20,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-26 11:57:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:20,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:57:20,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:20,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415291902] [2023-11-26 11:57:20,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415291902] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:20,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720228949] [2023-11-26 11:57:20,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:20,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:20,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:20,389 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:20,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 11:57:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:20,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-26 11:57:20,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:57:20,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:20,809 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:57:20,810 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 17 treesize of output 21 [2023-11-26 11:57:20,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:57:20,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720228949] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:20,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:57:20,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 21 [2023-11-26 11:57:20,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422643106] [2023-11-26 11:57:20,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:20,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-26 11:57:20,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:20,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-26 11:57:20,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2023-11-26 11:57:20,865 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 11:57:21,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:21,308 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2023-11-26 11:57:21,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-26 11:57:21,309 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2023-11-26 11:57:21,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:21,310 INFO L225 Difference]: With dead ends: 78 [2023-11-26 11:57:21,310 INFO L226 Difference]: Without dead ends: 78 [2023-11-26 11:57:21,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2023-11-26 11:57:21,311 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 44 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:21,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 255 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:57:21,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-26 11:57:21,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 61. [2023-11-26 11:57:21,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 50 states have (on average 1.46) internal successors, (73), 56 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:57:21,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 79 transitions. [2023-11-26 11:57:21,316 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 79 transitions. Word has length 23 [2023-11-26 11:57:21,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:21,316 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 79 transitions. [2023-11-26 11:57:21,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 11:57:21,319 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 79 transitions. [2023-11-26 11:57:21,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-26 11:57:21,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:21,319 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:21,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:21,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-26 11:57:21,525 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-26 11:57:21,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:21,526 INFO L85 PathProgramCache]: Analyzing trace with hash -625969896, now seen corresponding path program 2 times [2023-11-26 11:57:21,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:21,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205338369] [2023-11-26 11:57:21,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:21,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:21,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:22,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:57:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:22,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-26 11:57:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:57:22,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:22,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205338369] [2023-11-26 11:57:22,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205338369] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:22,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683337544] [2023-11-26 11:57:22,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:57:22,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:22,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:22,174 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:22,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 11:57:22,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:57:22,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:57:22,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 69 conjunts are in the unsatisfiable core [2023-11-26 11:57:22,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:22,312 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 [2023-11-26 11:57:22,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 11:57:22,536 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 [2023-11-26 11:57:22,608 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 11:57:22,609 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 [2023-11-26 11:57:22,701 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 27 treesize of output 15 [2023-11-26 11:57:22,708 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 22 [2023-11-26 11:57:22,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:22,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:23,401 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:57:23,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 2113 treesize of output 1999 [2023-11-26 11:57:24,071 INFO L349 Elim1Store]: treesize reduction 154, result has 57.3 percent of original size [2023-11-26 11:57:24,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 36 case distinctions, treesize of input 2153 treesize of output 2147 [2023-11-26 11:57:31,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683337544] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:31,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:57:31,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2023-11-26 11:57:31,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623782784] [2023-11-26 11:57:31,358 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:31,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 11:57:31,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:31,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 11:57:31,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=737, Unknown=0, NotChecked=0, Total=812 [2023-11-26 11:57:31,360 INFO L87 Difference]: Start difference. First operand 61 states and 79 transitions. Second operand has 25 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 19 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 11:57:31,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:31,779 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2023-11-26 11:57:31,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 11:57:31,783 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 19 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2023-11-26 11:57:31,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:31,785 INFO L225 Difference]: With dead ends: 61 [2023-11-26 11:57:31,785 INFO L226 Difference]: Without dead ends: 61 [2023-11-26 11:57:31,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2023-11-26 11:57:31,786 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:31,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 303 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:57:31,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-26 11:57:31,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2023-11-26 11:57:31,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 55 states have internal predecessors, (69), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:57:31,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2023-11-26 11:57:31,791 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 23 [2023-11-26 11:57:31,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:31,792 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2023-11-26 11:57:31,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 19 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 11:57:31,793 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2023-11-26 11:57:31,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 11:57:31,793 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:31,794 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:31,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:31,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-26 11:57:31,994 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-26 11:57:31,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:31,995 INFO L85 PathProgramCache]: Analyzing trace with hash -261700478, now seen corresponding path program 1 times [2023-11-26 11:57:31,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:31,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002896254] [2023-11-26 11:57:31,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:31,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:32,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:57:32,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:32,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-26 11:57:32,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:32,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:57:32,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:32,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002896254] [2023-11-26 11:57:32,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002896254] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:32,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683359373] [2023-11-26 11:57:32,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:32,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:32,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:32,161 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:32,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-26 11:57:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:32,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-26 11:57:32,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:32,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:57:32,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:32,399 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-26 11:57:32,399 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 12 treesize of output 11 [2023-11-26 11:57:32,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:57:32,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683359373] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:32,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:57:32,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 7 [2023-11-26 11:57:32,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206563179] [2023-11-26 11:57:32,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:32,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:57:32,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:32,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:57:32,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:57:32,421 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:57:32,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:32,529 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2023-11-26 11:57:32,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:57:32,530 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-11-26 11:57:32,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:32,531 INFO L225 Difference]: With dead ends: 63 [2023-11-26 11:57:32,531 INFO L226 Difference]: Without dead ends: 63 [2023-11-26 11:57:32,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:57:32,532 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 13 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:32,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 104 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:57:32,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-26 11:57:32,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2023-11-26 11:57:32,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 55 states have internal predecessors, (68), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:57:32,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2023-11-26 11:57:32,545 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 25 [2023-11-26 11:57:32,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:32,545 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2023-11-26 11:57:32,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:57:32,546 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2023-11-26 11:57:32,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-26 11:57:32,547 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:32,547 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:32,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:32,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-26 11:57:32,754 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-26 11:57:32,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:32,754 INFO L85 PathProgramCache]: Analyzing trace with hash 815739253, now seen corresponding path program 2 times [2023-11-26 11:57:32,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:32,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296892847] [2023-11-26 11:57:32,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:32,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:32,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:57:32,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:32,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-26 11:57:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:32,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-26 11:57:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:33,038 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:57:33,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:33,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296892847] [2023-11-26 11:57:33,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296892847] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:33,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139193631] [2023-11-26 11:57:33,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:57:33,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:33,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:33,042 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:33,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-26 11:57:33,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:57:33,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:57:33,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-26 11:57:33,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:33,255 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2023-11-26 11:57:33,282 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-26 11:57:33,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-26 11:57:33,298 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 11:57:33,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:33,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139193631] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:33,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:57:33,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2023-11-26 11:57:33,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219391790] [2023-11-26 11:57:33,367 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:33,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:57:33,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:33,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:57:33,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=84, Unknown=1, NotChecked=18, Total=132 [2023-11-26 11:57:33,369 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 11:57:33,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:33,502 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2023-11-26 11:57:33,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:57:33,503 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2023-11-26 11:57:33,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:33,504 INFO L225 Difference]: With dead ends: 61 [2023-11-26 11:57:33,504 INFO L226 Difference]: Without dead ends: 61 [2023-11-26 11:57:33,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=84, Unknown=1, NotChecked=18, Total=132 [2023-11-26 11:57:33,505 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:33,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 141 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 131 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2023-11-26 11:57:33,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-26 11:57:33,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2023-11-26 11:57:33,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 55 states have internal predecessors, (67), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:57:33,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2023-11-26 11:57:33,509 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 27 [2023-11-26 11:57:33,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:33,509 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2023-11-26 11:57:33,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 11:57:33,509 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2023-11-26 11:57:33,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-26 11:57:33,511 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:33,511 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:33,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:33,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-26 11:57:33,718 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-26 11:57:33,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:33,719 INFO L85 PathProgramCache]: Analyzing trace with hash 815739254, now seen corresponding path program 2 times [2023-11-26 11:57:33,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:33,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311371507] [2023-11-26 11:57:33,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:33,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:34,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:57:34,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:34,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-26 11:57:34,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:34,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-26 11:57:34,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:34,199 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:57:34,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:34,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311371507] [2023-11-26 11:57:34,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311371507] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:34,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996287063] [2023-11-26 11:57:34,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:57:34,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:34,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:34,202 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:34,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-26 11:57:34,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:57:34,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:57:34,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-26 11:57:34,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:34,481 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2023-11-26 11:57:34,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:34,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 11:57:34,522 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 11:57:34,522 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 [2023-11-26 11:57:34,556 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-11-26 11:57:34,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:34,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996287063] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:34,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:57:34,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2023-11-26 11:57:34,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830852324] [2023-11-26 11:57:34,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:34,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 11:57:34,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:34,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 11:57:34,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=258, Unknown=1, NotChecked=32, Total=342 [2023-11-26 11:57:34,738 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-26 11:57:34,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:34,985 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2023-11-26 11:57:34,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 11:57:34,985 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 27 [2023-11-26 11:57:34,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:34,986 INFO L225 Difference]: With dead ends: 69 [2023-11-26 11:57:34,986 INFO L226 Difference]: Without dead ends: 69 [2023-11-26 11:57:34,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=320, Unknown=1, NotChecked=36, Total=420 [2023-11-26 11:57:34,987 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:34,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 247 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 177 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2023-11-26 11:57:34,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-26 11:57:34,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2023-11-26 11:57:34,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 62 states have internal predecessors, (75), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-26 11:57:34,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2023-11-26 11:57:34,990 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 27 [2023-11-26 11:57:34,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:34,990 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2023-11-26 11:57:34,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-26 11:57:34,990 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2023-11-26 11:57:34,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-26 11:57:34,991 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:34,991 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:35,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:35,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:35,192 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-26 11:57:35,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:35,192 INFO L85 PathProgramCache]: Analyzing trace with hash -2053552224, now seen corresponding path program 3 times [2023-11-26 11:57:35,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:35,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89286783] [2023-11-26 11:57:35,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:35,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:35,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:35,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:57:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:35,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-26 11:57:35,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:35,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-26 11:57:35,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:35,832 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:57:35,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:35,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89286783] [2023-11-26 11:57:35,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89286783] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:35,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237236360] [2023-11-26 11:57:35,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:57:35,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:35,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:35,835 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:35,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-26 11:57:36,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-26 11:57:36,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:57:36,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-26 11:57:36,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:36,282 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 15 treesize of output 1 [2023-11-26 11:57:36,293 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 15 treesize of output 1 [2023-11-26 11:57:36,346 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 15 treesize of output 7 [2023-11-26 11:57:36,591 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-26 11:57:36,592 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 16 treesize of output 15 [2023-11-26 11:57:36,602 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 5 treesize of output 3 [2023-11-26 11:57:36,626 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-26 11:57:36,627 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 [2023-11-26 11:57:36,714 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2023-11-26 11:57:36,715 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 62 treesize of output 48 [2023-11-26 11:57:36,904 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 25 treesize of output 13 [2023-11-26 11:57:36,981 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:57:36,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:37,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237236360] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:37,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:57:37,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2023-11-26 11:57:37,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316144489] [2023-11-26 11:57:37,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:37,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-26 11:57:37,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:37,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-26 11:57:37,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1290, Unknown=0, NotChecked=0, Total=1406 [2023-11-26 11:57:37,350 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 34 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-26 11:57:38,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:38,040 INFO L93 Difference]: Finished difference Result 74 states and 91 transitions. [2023-11-26 11:57:38,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 11:57:38,040 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 29 [2023-11-26 11:57:38,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:38,041 INFO L225 Difference]: With dead ends: 74 [2023-11-26 11:57:38,041 INFO L226 Difference]: Without dead ends: 74 [2023-11-26 11:57:38,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=189, Invalid=1973, Unknown=0, NotChecked=0, Total=2162 [2023-11-26 11:57:38,044 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:38,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 499 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:57:38,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-26 11:57:38,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2023-11-26 11:57:38,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 58 states have (on average 1.3620689655172413) internal successors, (79), 64 states have internal predecessors, (79), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-26 11:57:38,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2023-11-26 11:57:38,048 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 29 [2023-11-26 11:57:38,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:38,049 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2023-11-26 11:57:38,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-26 11:57:38,049 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2023-11-26 11:57:38,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-26 11:57:38,050 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:38,050 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:38,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:38,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-26 11:57:38,257 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-26 11:57:38,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:38,257 INFO L85 PathProgramCache]: Analyzing trace with hash -2053552223, now seen corresponding path program 2 times [2023-11-26 11:57:38,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:38,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322261473] [2023-11-26 11:57:38,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:38,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:38,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:39,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:57:39,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:39,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-26 11:57:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:39,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-26 11:57:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:39,461 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:57:39,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:39,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322261473] [2023-11-26 11:57:39,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322261473] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:39,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404879564] [2023-11-26 11:57:39,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:57:39,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:39,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:39,464 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:39,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-26 11:57:39,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:57:39,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:57:39,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 79 conjunts are in the unsatisfiable core [2023-11-26 11:57:39,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:39,637 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 [2023-11-26 11:57:39,905 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 11:57:39,906 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 [2023-11-26 11:57:39,957 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 [2023-11-26 11:57:39,971 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 [2023-11-26 11:57:40,211 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#memory_$Pointer$#0.base)| alloc_and_zero_~pi~0.base (select |c_#memory_$Pointer$#0.base| alloc_and_zero_~pi~0.base)) |c_#memory_$Pointer$#0.base|) (= (store |c_old(#memory_$Pointer$#0.offset)| alloc_and_zero_~pi~0.base (select |c_#memory_$Pointer$#0.offset| alloc_and_zero_~pi~0.base)) |c_#memory_$Pointer$#0.offset|))) is different from true [2023-11-26 11:57:40,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:40,227 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 17 [2023-11-26 11:57:40,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:40,237 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 [2023-11-26 11:57:40,246 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 11:57:40,247 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 [2023-11-26 11:57:40,314 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 11:57:40,315 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 50 treesize of output 45 [2023-11-26 11:57:40,323 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 [2023-11-26 11:57:40,487 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 25 treesize of output 13 [2023-11-26 11:57:40,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-26 11:57:40,500 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-26 11:57:40,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:40,688 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:57:40,689 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 38 treesize of output 42 [2023-11-26 11:57:40,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404879564] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:40,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:57:40,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2023-11-26 11:57:40,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520899803] [2023-11-26 11:57:40,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:40,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-26 11:57:40,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:40,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-26 11:57:40,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1292, Unknown=2, NotChecked=72, Total=1482 [2023-11-26 11:57:40,971 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand has 34 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 25 states have internal predecessors, (43), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-26 11:57:41,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:41,651 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2023-11-26 11:57:41,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 11:57:41,653 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 25 states have internal predecessors, (43), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 29 [2023-11-26 11:57:41,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:41,654 INFO L225 Difference]: With dead ends: 72 [2023-11-26 11:57:41,654 INFO L226 Difference]: Without dead ends: 72 [2023-11-26 11:57:41,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=169, Invalid=1725, Unknown=2, NotChecked=84, Total=1980 [2023-11-26 11:57:41,656 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:41,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 446 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 479 Invalid, 0 Unknown, 57 Unchecked, 0.3s Time] [2023-11-26 11:57:41,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-26 11:57:41,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2023-11-26 11:57:41,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 64 states have internal predecessors, (78), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-26 11:57:41,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2023-11-26 11:57:41,659 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 29 [2023-11-26 11:57:41,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:41,660 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2023-11-26 11:57:41,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 25 states have internal predecessors, (43), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-26 11:57:41,660 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2023-11-26 11:57:41,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-26 11:57:41,661 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:41,661 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:41,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:41,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-26 11:57:41,867 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-26 11:57:41,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:41,867 INFO L85 PathProgramCache]: Analyzing trace with hash -425589590, now seen corresponding path program 1 times [2023-11-26 11:57:41,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:41,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370920557] [2023-11-26 11:57:41,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:41,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:42,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:57:42,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:42,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-26 11:57:42,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:42,247 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:57:42,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:42,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370920557] [2023-11-26 11:57:42,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370920557] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:42,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130357430] [2023-11-26 11:57:42,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:42,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:42,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:42,253 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:42,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-26 11:57:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:42,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-26 11:57:42,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:42,548 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 15 treesize of output 1 [2023-11-26 11:57:42,552 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 [2023-11-26 11:57:42,676 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:57:42,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2023-11-26 11:57:42,691 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:57:42,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-26 11:57:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 11:57:42,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:43,090 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 28 treesize of output 24 [2023-11-26 11:57:43,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:43,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:43,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-26 11:57:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:57:43,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130357430] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:43,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:57:43,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14] total 33 [2023-11-26 11:57:43,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82085637] [2023-11-26 11:57:43,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:43,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-26 11:57:43,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:43,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-26 11:57:43,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1030, Unknown=0, NotChecked=0, Total=1122 [2023-11-26 11:57:43,285 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 34 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-26 11:57:44,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:44,356 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2023-11-26 11:57:44,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-26 11:57:44,356 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 30 [2023-11-26 11:57:44,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:44,357 INFO L225 Difference]: With dead ends: 92 [2023-11-26 11:57:44,357 INFO L226 Difference]: Without dead ends: 92 [2023-11-26 11:57:44,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=226, Invalid=2030, Unknown=0, NotChecked=0, Total=2256 [2023-11-26 11:57:44,359 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 86 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:44,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 318 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:57:44,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-26 11:57:44,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 75. [2023-11-26 11:57:44,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 69 states have internal predecessors, (85), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-26 11:57:44,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 93 transitions. [2023-11-26 11:57:44,362 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 93 transitions. Word has length 30 [2023-11-26 11:57:44,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:44,363 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 93 transitions. [2023-11-26 11:57:44,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-26 11:57:44,363 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 93 transitions. [2023-11-26 11:57:44,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-26 11:57:44,363 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:44,363 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:44,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:44,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-26 11:57:44,574 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-26 11:57:44,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:44,574 INFO L85 PathProgramCache]: Analyzing trace with hash -425589591, now seen corresponding path program 1 times [2023-11-26 11:57:44,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:44,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817349055] [2023-11-26 11:57:44,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:44,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:44,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:57:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:44,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-26 11:57:44,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:45,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:57:45,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:45,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817349055] [2023-11-26 11:57:45,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817349055] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:45,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922367734] [2023-11-26 11:57:45,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:45,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:45,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:45,055 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:45,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1343130-7409-4a25-a90d-318d426cb1d6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-26 11:57:45,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:45,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-26 11:57:45,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:45,217 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 [2023-11-26 11:57:45,432 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-26 11:57:45,432 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 [2023-11-26 11:57:45,477 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 [2023-11-26 11:57:45,655 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:57:45,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2023-11-26 11:57:45,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 19 treesize of output 12 [2023-11-26 11:57:45,814 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:57:45,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:46,061 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 30 treesize of output 26 [2023-11-26 11:57:46,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:57:46,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922367734] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:46,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:57:46,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2023-11-26 11:57:46,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838587600] [2023-11-26 11:57:46,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:46,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-26 11:57:46,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:46,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-26 11:57:46,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1035, Unknown=0, NotChecked=0, Total=1122 [2023-11-26 11:57:46,228 INFO L87 Difference]: Start difference. First operand 75 states and 93 transitions. Second operand has 28 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4)