./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 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_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX --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 29e5ebbacca85d2fb1b0bd6d164adabb3234eca085536ff1d3458c8110967632 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 17:53:18,916 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 17:53:19,019 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2024-11-08 17:53:19,029 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 17:53:19,029 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 17:53:19,078 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 17:53:19,081 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 17:53:19,083 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 17:53:19,084 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 17:53:19,085 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 17:53:19,086 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 17:53:19,086 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 17:53:19,087 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 17:53:19,090 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 17:53:19,091 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 17:53:19,091 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 17:53:19,092 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 17:53:19,092 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 17:53:19,092 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 17:53:19,093 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 17:53:19,093 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 17:53:19,097 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 17:53:19,098 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 17:53:19,098 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 17:53:19,098 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 17:53:19,099 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 17:53:19,099 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 17:53:19,100 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 17:53:19,100 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 17:53:19,100 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 17:53:19,101 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:53:19,104 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 17:53:19,105 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 17:53:19,105 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 17:53:19,105 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 17:53:19,106 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 17:53:19,106 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 17:53:19,107 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 17:53:19,108 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 17:53:19,108 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_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 29e5ebbacca85d2fb1b0bd6d164adabb3234eca085536ff1d3458c8110967632 [2024-11-08 17:53:19,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 17:53:19,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 17:53:19,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 17:53:19,511 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 17:53:19,512 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 17:53:19,513 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c Unable to find full path for "g++" [2024-11-08 17:53:21,814 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 17:53:22,103 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 17:53:22,103 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c [2024-11-08 17:53:22,113 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/data/d0ee36e69/7c5463eb13b0405eb31975a4cca7646d/FLAG02b33eda5 [2024-11-08 17:53:22,407 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/data/d0ee36e69/7c5463eb13b0405eb31975a4cca7646d [2024-11-08 17:53:22,411 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 17:53:22,415 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 17:53:22,419 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 17:53:22,420 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 17:53:22,428 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 17:53:22,429 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:53:22" (1/1) ... [2024-11-08 17:53:22,433 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c3ca39e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:53:22, skipping insertion in model container [2024-11-08 17:53:22,433 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:53:22" (1/1) ... [2024-11-08 17:53:22,454 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 17:53:22,712 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:53:22,723 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 17:53:22,740 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:53:22,762 INFO L204 MainTranslator]: Completed translation [2024-11-08 17:53:22,762 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:53:22 WrapperNode [2024-11-08 17:53:22,762 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 17:53:22,764 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 17:53:22,764 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 17:53:22,764 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 17:53:22,773 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:53:22" (1/1) ... [2024-11-08 17:53:22,781 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:53:22" (1/1) ... [2024-11-08 17:53:22,801 INFO L138 Inliner]: procedures = 10, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 45 [2024-11-08 17:53:22,802 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 17:53:22,803 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 17:53:22,803 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 17:53:22,803 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 17:53:22,818 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:53:22" (1/1) ... [2024-11-08 17:53:22,819 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:53:22" (1/1) ... [2024-11-08 17:53:22,821 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:53:22" (1/1) ... [2024-11-08 17:53:22,837 INFO L175 MemorySlicer]: Split 4 memory accesses to 1 slices as follows [4]. 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]. [2024-11-08 17:53:22,837 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:53:22" (1/1) ... [2024-11-08 17:53:22,838 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:53:22" (1/1) ... [2024-11-08 17:53:22,844 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:53:22" (1/1) ... [2024-11-08 17:53:22,848 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:53:22" (1/1) ... [2024-11-08 17:53:22,849 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:53:22" (1/1) ... [2024-11-08 17:53:22,851 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:53:22" (1/1) ... [2024-11-08 17:53:22,853 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 17:53:22,854 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 17:53:22,854 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 17:53:22,855 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 17:53:22,856 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:53:22" (1/1) ... [2024-11-08 17:53:22,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:53:22,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:53:22,905 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 17:53:22,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 17:53:22,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 17:53:22,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 17:53:22,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 17:53:22,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 17:53:22,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 17:53:22,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 17:53:23,046 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 17:53:23,050 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 17:53:23,273 INFO L? ?]: Removed 29 outVars from TransFormulas that were not future-live. [2024-11-08 17:53:23,274 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 17:53:23,291 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 17:53:23,291 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-08 17:53:23,292 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:53:23 BoogieIcfgContainer [2024-11-08 17:53:23,292 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 17:53:23,295 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 17:53:23,295 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 17:53:23,301 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 17:53:23,301 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 05:53:22" (1/3) ... [2024-11-08 17:53:23,302 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@90085cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:53:23, skipping insertion in model container [2024-11-08 17:53:23,303 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:53:22" (2/3) ... [2024-11-08 17:53:23,303 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@90085cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:53:23, skipping insertion in model container [2024-11-08 17:53:23,304 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:53:23" (3/3) ... [2024-11-08 17:53:23,305 INFO L112 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-3.c [2024-11-08 17:53:23,327 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 17:53:23,327 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2024-11-08 17:53:23,380 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 17:53:23,389 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@5850965, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 17:53:23,390 INFO L334 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2024-11-08 17:53:23,400 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.894736842105263) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:23,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-08 17:53:23,412 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:53:23,413 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-08 17:53:23,413 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 17:53:23,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:53:23,421 INFO L85 PathProgramCache]: Analyzing trace with hash 28705683, now seen corresponding path program 1 times [2024-11-08 17:53:23,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:53:23,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741210384] [2024-11-08 17:53:23,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:53:23,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:53:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:53:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:53:23,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:53:23,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741210384] [2024-11-08 17:53:23,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741210384] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:53:23,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:53:23,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:53:23,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656911495] [2024-11-08 17:53:23,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:53:23,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:53:23,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:53:23,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:53:23,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:53:23,785 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.894736842105263) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:23,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:53:23,879 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2024-11-08 17:53:23,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:53:23,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-08 17:53:23,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:53:23,892 INFO L225 Difference]: With dead ends: 37 [2024-11-08 17:53:23,893 INFO L226 Difference]: Without dead ends: 35 [2024-11-08 17:53:23,895 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:53:23,901 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 4 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:53:23,905 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 55 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 17:53:23,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-08 17:53:23,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2024-11-08 17:53:23,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.75) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:23,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2024-11-08 17:53:23,955 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 5 [2024-11-08 17:53:23,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:53:23,955 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2024-11-08 17:53:23,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:23,956 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2024-11-08 17:53:23,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-08 17:53:23,957 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:53:23,958 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-08 17:53:23,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 17:53:23,958 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 17:53:23,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:53:23,960 INFO L85 PathProgramCache]: Analyzing trace with hash 28694853, now seen corresponding path program 1 times [2024-11-08 17:53:23,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:53:23,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737525681] [2024-11-08 17:53:23,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:53:23,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:53:23,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:53:24,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:53:24,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:53:24,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737525681] [2024-11-08 17:53:24,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737525681] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:53:24,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:53:24,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:53:24,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161041347] [2024-11-08 17:53:24,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:53:24,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:53:24,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:53:24,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:53:24,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:53:24,131 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:24,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:53:24,196 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2024-11-08 17:53:24,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:53:24,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-08 17:53:24,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:53:24,198 INFO L225 Difference]: With dead ends: 30 [2024-11-08 17:53:24,198 INFO L226 Difference]: Without dead ends: 30 [2024-11-08 17:53:24,199 INFO L431 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 [2024-11-08 17:53:24,201 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:53:24,201 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 17 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 17:53:24,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-08 17:53:24,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-08 17:53:24,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.65) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:24,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-11-08 17:53:24,207 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 5 [2024-11-08 17:53:24,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:53:24,207 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-11-08 17:53:24,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:24,208 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-11-08 17:53:24,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-08 17:53:24,208 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:53:24,209 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-08 17:53:24,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 17:53:24,209 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 17:53:24,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:53:24,210 INFO L85 PathProgramCache]: Analyzing trace with hash 28694854, now seen corresponding path program 1 times [2024-11-08 17:53:24,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:53:24,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447382953] [2024-11-08 17:53:24,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:53:24,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:53:24,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:53:24,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:53:24,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:53:24,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447382953] [2024-11-08 17:53:24,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447382953] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:53:24,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:53:24,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:53:24,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60443697] [2024-11-08 17:53:24,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:53:24,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:53:24,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:53:24,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:53:24,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:53:24,356 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:24,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:53:24,459 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2024-11-08 17:53:24,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:53:24,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-08 17:53:24,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:53:24,461 INFO L225 Difference]: With dead ends: 32 [2024-11-08 17:53:24,461 INFO L226 Difference]: Without dead ends: 32 [2024-11-08 17:53:24,462 INFO L431 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 [2024-11-08 17:53:24,464 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 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 [2024-11-08 17:53:24,465 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 17:53:24,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-08 17:53:24,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2024-11-08 17:53:24,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.619047619047619) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:24,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2024-11-08 17:53:24,470 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 5 [2024-11-08 17:53:24,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:53:24,471 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2024-11-08 17:53:24,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:24,471 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2024-11-08 17:53:24,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-08 17:53:24,472 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:53:24,472 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:53:24,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 17:53:24,477 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 17:53:24,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:53:24,478 INFO L85 PathProgramCache]: Analyzing trace with hash 350661387, now seen corresponding path program 1 times [2024-11-08 17:53:24,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:53:24,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556136386] [2024-11-08 17:53:24,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:53:24,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:53:24,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:53:24,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:53:24,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:53:24,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556136386] [2024-11-08 17:53:24,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556136386] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:53:24,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735994360] [2024-11-08 17:53:24,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:53:24,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:53:24,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:53:24,584 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:53:24,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 17:53:24,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:53:24,689 INFO L255 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 17:53:24,694 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:53:24,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:53:24,753 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:53:24,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:53:24,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735994360] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:53:24,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:53:24,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-08 17:53:24,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301381618] [2024-11-08 17:53:24,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:53:24,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 17:53:24,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:53:24,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 17:53:24,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-08 17:53:24,805 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:24,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:53:24,889 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2024-11-08 17:53:24,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:53:24,890 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-08 17:53:24,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:53:24,891 INFO L225 Difference]: With dead ends: 41 [2024-11-08 17:53:24,891 INFO L226 Difference]: Without dead ends: 41 [2024-11-08 17:53:24,892 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-08 17:53:24,893 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:53:24,894 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 69 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 17:53:24,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-08 17:53:24,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-11-08 17:53:24,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:24,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2024-11-08 17:53:24,901 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 9 [2024-11-08 17:53:24,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:53:24,901 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2024-11-08 17:53:24,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:24,902 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2024-11-08 17:53:24,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-08 17:53:24,903 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:53:24,903 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-08 17:53:24,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 17:53:25,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:53:25,104 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 17:53:25,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:53:25,105 INFO L85 PathProgramCache]: Analyzing trace with hash 350650558, now seen corresponding path program 1 times [2024-11-08 17:53:25,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:53:25,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282313500] [2024-11-08 17:53:25,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:53:25,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:53:25,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:53:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:53:25,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:53:25,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282313500] [2024-11-08 17:53:25,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282313500] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:53:25,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170193039] [2024-11-08 17:53:25,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:53:25,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:53:25,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:53:25,292 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:53:25,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 17:53:25,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:53:25,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 17:53:25,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:53:25,402 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 [2024-11-08 17:53:25,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:53:25,543 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:53:25,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:53:25,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170193039] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:53:25,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:53:25,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-08 17:53:25,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503128430] [2024-11-08 17:53:25,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:53:25,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 17:53:25,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:53:25,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 17:53:25,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-08 17:53:25,698 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:25,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:53:25,863 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2024-11-08 17:53:25,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:53:25,864 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-08 17:53:25,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:53:25,865 INFO L225 Difference]: With dead ends: 43 [2024-11-08 17:53:25,866 INFO L226 Difference]: Without dead ends: 43 [2024-11-08 17:53:25,866 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-11-08 17:53:25,867 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:53:25,868 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 62 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 17:53:25,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-08 17:53:25,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-08 17:53:25,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 42 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:25,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2024-11-08 17:53:25,874 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 9 [2024-11-08 17:53:25,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:53:25,875 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2024-11-08 17:53:25,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:25,876 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2024-11-08 17:53:25,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-08 17:53:25,876 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:53:25,877 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-08 17:53:25,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 17:53:26,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:53:26,083 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 17:53:26,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:53:26,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1636678003, now seen corresponding path program 2 times [2024-11-08 17:53:26,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:53:26,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956611824] [2024-11-08 17:53:26,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:53:26,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:53:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:53:26,212 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-08 17:53:26,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:53:26,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956611824] [2024-11-08 17:53:26,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956611824] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:53:26,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:53:26,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:53:26,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447860828] [2024-11-08 17:53:26,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:53:26,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:53:26,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:53:26,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:53:26,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:53:26,216 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:26,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:53:26,303 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2024-11-08 17:53:26,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:53:26,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-08 17:53:26,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:53:26,305 INFO L225 Difference]: With dead ends: 40 [2024-11-08 17:53:26,305 INFO L226 Difference]: Without dead ends: 40 [2024-11-08 17:53:26,305 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:53:26,306 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:53:26,307 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 18 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 17:53:26,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-08 17:53:26,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-08 17:53:26,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:26,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2024-11-08 17:53:26,312 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 21 [2024-11-08 17:53:26,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:53:26,313 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2024-11-08 17:53:26,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:26,313 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2024-11-08 17:53:26,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-08 17:53:26,314 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:53:26,314 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-08 17:53:26,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-08 17:53:26,315 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 17:53:26,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:53:26,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1636678004, now seen corresponding path program 1 times [2024-11-08 17:53:26,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:53:26,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894114083] [2024-11-08 17:53:26,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:53:26,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:53:26,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:53:26,461 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:53:26,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:53:26,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894114083] [2024-11-08 17:53:26,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894114083] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:53:26,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591919943] [2024-11-08 17:53:26,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:53:26,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:53:26,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:53:26,465 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:53:26,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 17:53:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:53:26,541 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 17:53:26,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:53:26,632 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:53:26,632 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:53:26,784 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:53:26,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591919943] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:53:26,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:53:26,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-08 17:53:26,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039958412] [2024-11-08 17:53:26,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:53:26,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 17:53:26,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:53:26,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 17:53:26,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-08 17:53:26,793 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:26,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:53:26,908 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2024-11-08 17:53:26,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 17:53:26,909 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-08 17:53:26,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:53:26,912 INFO L225 Difference]: With dead ends: 62 [2024-11-08 17:53:26,913 INFO L226 Difference]: Without dead ends: 62 [2024-11-08 17:53:26,914 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-08 17:53:26,915 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:53:26,917 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 60 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 17:53:26,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-08 17:53:26,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-11-08 17:53:26,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 55 states have (on average 1.2545454545454546) internal successors, (69), 61 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:26,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2024-11-08 17:53:26,931 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 21 [2024-11-08 17:53:26,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:53:26,931 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2024-11-08 17:53:26,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:26,932 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2024-11-08 17:53:26,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-08 17:53:26,932 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:53:26,932 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1] [2024-11-08 17:53:26,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 17:53:27,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-08 17:53:27,133 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 17:53:27,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:53:27,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1636667174, now seen corresponding path program 2 times [2024-11-08 17:53:27,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:53:27,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561043776] [2024-11-08 17:53:27,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:53:27,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:53:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:53:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:53:27,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:53:27,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561043776] [2024-11-08 17:53:27,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561043776] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:53:27,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382681181] [2024-11-08 17:53:27,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:53:27,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:53:27,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:53:27,466 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:53:27,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 17:53:27,529 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 17:53:27,530 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:53:27,531 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-08 17:53:27,532 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:53:27,551 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 [2024-11-08 17:53:27,841 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:53:27,842 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:53:27,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382681181] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:53:27,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 17:53:27,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2024-11-08 17:53:27,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107302835] [2024-11-08 17:53:27,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:53:27,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 17:53:27,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:53:27,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 17:53:27,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-08 17:53:27,850 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:27,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:53:27,966 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2024-11-08 17:53:27,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 17:53:27,968 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-08 17:53:27,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:53:27,969 INFO L225 Difference]: With dead ends: 61 [2024-11-08 17:53:27,969 INFO L226 Difference]: Without dead ends: 61 [2024-11-08 17:53:27,970 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-08 17:53:27,970 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:53:27,971 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 39 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 17:53:27,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-08 17:53:27,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-11-08 17:53:27,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 60 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:27,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2024-11-08 17:53:27,979 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 21 [2024-11-08 17:53:27,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:53:27,980 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2024-11-08 17:53:27,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:27,984 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2024-11-08 17:53:27,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-08 17:53:27,985 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:53:27,985 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1] [2024-11-08 17:53:28,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 17:53:28,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:53:28,186 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 17:53:28,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:53:28,187 INFO L85 PathProgramCache]: Analyzing trace with hash -624508348, now seen corresponding path program 2 times [2024-11-08 17:53:28,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:53:28,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665567219] [2024-11-08 17:53:28,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:53:28,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:53:28,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:53:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:53:28,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:53:28,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665567219] [2024-11-08 17:53:28,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665567219] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:53:28,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473322118] [2024-11-08 17:53:28,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:53:28,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:53:28,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:53:28,432 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:53:28,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 17:53:28,496 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-08 17:53:28,496 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:53:28,497 INFO L255 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 17:53:28,499 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:53:28,514 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 [2024-11-08 17:53:28,794 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-08 17:53:28,795 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:53:28,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473322118] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:53:28,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 17:53:28,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2024-11-08 17:53:28,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601711486] [2024-11-08 17:53:28,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:53:28,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:53:28,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:53:28,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:53:28,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2024-11-08 17:53:28,798 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:28,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:53:28,865 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2024-11-08 17:53:28,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:53:28,866 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-11-08 17:53:28,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:53:28,867 INFO L225 Difference]: With dead ends: 67 [2024-11-08 17:53:28,867 INFO L226 Difference]: Without dead ends: 67 [2024-11-08 17:53:28,867 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2024-11-08 17:53:28,868 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 17:53:28,869 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 27 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 17:53:28,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-08 17:53:28,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-08 17:53:28,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 66 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:28,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2024-11-08 17:53:28,874 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 45 [2024-11-08 17:53:28,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:53:28,875 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2024-11-08 17:53:28,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:28,875 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2024-11-08 17:53:28,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-08 17:53:28,876 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:53:28,876 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:53:28,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 17:53:29,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:53:29,077 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 17:53:29,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:53:29,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1070099899, now seen corresponding path program 1 times [2024-11-08 17:53:29,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:53:29,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445073042] [2024-11-08 17:53:29,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:53:29,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:53:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:53:29,146 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-08 17:53:29,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:53:29,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445073042] [2024-11-08 17:53:29,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445073042] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:53:29,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:53:29,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:53:29,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216674571] [2024-11-08 17:53:29,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:53:29,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:53:29,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:53:29,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:53:29,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:53:29,148 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:29,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:53:29,162 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2024-11-08 17:53:29,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:53:29,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-11-08 17:53:29,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:53:29,163 INFO L225 Difference]: With dead ends: 66 [2024-11-08 17:53:29,163 INFO L226 Difference]: Without dead ends: 66 [2024-11-08 17:53:29,164 INFO L431 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 [2024-11-08 17:53:29,164 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 17:53:29,165 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 19 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 17:53:29,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-08 17:53:29,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-11-08 17:53:29,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:29,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2024-11-08 17:53:29,175 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 48 [2024-11-08 17:53:29,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:53:29,175 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2024-11-08 17:53:29,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:29,175 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2024-11-08 17:53:29,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-08 17:53:29,176 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:53:29,176 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:53:29,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-08 17:53:29,177 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 17:53:29,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:53:29,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1070101300, now seen corresponding path program 1 times [2024-11-08 17:53:29,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:53:29,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703563608] [2024-11-08 17:53:29,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:53:29,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:53:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:53:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:53:29,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:53:29,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703563608] [2024-11-08 17:53:29,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703563608] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:53:29,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907814456] [2024-11-08 17:53:29,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:53:29,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:53:29,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:53:29,484 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:53:29,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 17:53:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:53:29,601 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 17:53:29,603 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:53:29,684 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:53:29,684 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:53:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:53:29,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907814456] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:53:29,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:53:29,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-11-08 17:53:29,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413415146] [2024-11-08 17:53:29,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:53:29,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-08 17:53:29,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:53:29,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-08 17:53:29,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-11-08 17:53:29,998 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 25 states, 25 states have (on average 3.8) internal successors, (95), 25 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:30,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:53:30,166 INFO L93 Difference]: Finished difference Result 114 states and 118 transitions. [2024-11-08 17:53:30,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-08 17:53:30,167 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.8) internal successors, (95), 25 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-11-08 17:53:30,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:53:30,168 INFO L225 Difference]: With dead ends: 114 [2024-11-08 17:53:30,168 INFO L226 Difference]: Without dead ends: 114 [2024-11-08 17:53:30,168 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-11-08 17:53:30,169 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:53:30,169 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 88 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 17:53:30,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-08 17:53:30,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2024-11-08 17:53:30,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 110 states have (on average 1.0727272727272728) internal successors, (118), 113 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:30,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2024-11-08 17:53:30,179 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 48 [2024-11-08 17:53:30,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:53:30,179 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2024-11-08 17:53:30,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.8) internal successors, (95), 25 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:30,180 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2024-11-08 17:53:30,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-08 17:53:30,186 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:53:30,187 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:53:30,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 17:53:30,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:53:30,388 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 17:53:30,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:53:30,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1207422356, now seen corresponding path program 2 times [2024-11-08 17:53:30,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:53:30,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580410139] [2024-11-08 17:53:30,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:53:30,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:53:30,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:53:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:53:31,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:53:31,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580410139] [2024-11-08 17:53:31,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580410139] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:53:31,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022302523] [2024-11-08 17:53:31,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:53:31,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:53:31,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:53:31,206 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:53:31,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 17:53:31,356 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 17:53:31,356 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:53:31,359 INFO L255 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-08 17:53:31,364 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:53:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:53:31,539 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:53:32,750 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:53:32,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022302523] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:53:32,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:53:32,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-11-08 17:53:32,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290305304] [2024-11-08 17:53:32,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:53:32,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-08 17:53:32,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:53:32,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-08 17:53:32,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-11-08 17:53:32,757 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand has 49 states, 49 states have (on average 3.8979591836734695) internal successors, (191), 49 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:33,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:53:33,185 INFO L93 Difference]: Finished difference Result 210 states and 214 transitions. [2024-11-08 17:53:33,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-08 17:53:33,186 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.8979591836734695) internal successors, (191), 49 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2024-11-08 17:53:33,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:53:33,188 INFO L225 Difference]: With dead ends: 210 [2024-11-08 17:53:33,189 INFO L226 Difference]: Without dead ends: 210 [2024-11-08 17:53:33,190 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-11-08 17:53:33,191 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 17:53:33,191 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 156 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 17:53:33,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2024-11-08 17:53:33,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2024-11-08 17:53:33,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 206 states have (on average 1.0388349514563107) internal successors, (214), 209 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:33,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 214 transitions. [2024-11-08 17:53:33,207 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 214 transitions. Word has length 96 [2024-11-08 17:53:33,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:53:33,207 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 214 transitions. [2024-11-08 17:53:33,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.8979591836734695) internal successors, (191), 49 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:33,208 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 214 transitions. [2024-11-08 17:53:33,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2024-11-08 17:53:33,211 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:53:33,211 INFO L215 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:53:33,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 17:53:33,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:53:33,417 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 17:53:33,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:53:33,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1425030572, now seen corresponding path program 3 times [2024-11-08 17:53:33,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:53:33,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855507307] [2024-11-08 17:53:33,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:53:33,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:53:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:53:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:53:37,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:53:37,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855507307] [2024-11-08 17:53:37,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855507307] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:53:37,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904552941] [2024-11-08 17:53:37,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 17:53:37,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:53:37,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:53:37,141 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:53:37,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 17:53:37,285 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-08 17:53:37,285 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:53:37,286 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 17:53:37,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:53:37,303 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 [2024-11-08 17:53:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2024-11-08 17:53:38,401 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:53:39,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2024-11-08 17:53:39,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904552941] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:53:39,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:53:39,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 5, 5] total 57 [2024-11-08 17:53:39,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604992823] [2024-11-08 17:53:39,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:53:39,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-08 17:53:39,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:53:39,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-08 17:53:39,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1202, Invalid=1990, Unknown=0, NotChecked=0, Total=3192 [2024-11-08 17:53:39,752 INFO L87 Difference]: Start difference. First operand 210 states and 214 transitions. Second operand has 57 states, 57 states have (on average 3.754385964912281) internal successors, (214), 57 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:42,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:53:42,552 INFO L93 Difference]: Finished difference Result 231 states and 239 transitions. [2024-11-08 17:53:42,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-08 17:53:42,553 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.754385964912281) internal successors, (214), 57 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2024-11-08 17:53:42,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:53:42,555 INFO L225 Difference]: With dead ends: 231 [2024-11-08 17:53:42,555 INFO L226 Difference]: Without dead ends: 231 [2024-11-08 17:53:42,561 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1752 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3640, Invalid=8132, Unknown=0, NotChecked=0, Total=11772 [2024-11-08 17:53:42,562 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 17:53:42,562 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 83 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 17:53:42,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-08 17:53:42,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 227. [2024-11-08 17:53:42,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 225 states have (on average 1.0444444444444445) internal successors, (235), 226 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:42,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 235 transitions. [2024-11-08 17:53:42,572 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 235 transitions. Word has length 192 [2024-11-08 17:53:42,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:53:42,573 INFO L471 AbstractCegarLoop]: Abstraction has 227 states and 235 transitions. [2024-11-08 17:53:42,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.754385964912281) internal successors, (214), 57 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:42,573 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 235 transitions. [2024-11-08 17:53:42,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2024-11-08 17:53:42,576 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:53:42,577 INFO L215 NwaCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:53:42,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 17:53:42,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-08 17:53:42,781 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 17:53:42,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:53:42,782 INFO L85 PathProgramCache]: Analyzing trace with hash -88569850, now seen corresponding path program 1 times [2024-11-08 17:53:42,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:53:42,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379818332] [2024-11-08 17:53:42,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:53:42,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:53:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:53:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:53:46,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:53:46,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379818332] [2024-11-08 17:53:46,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379818332] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:53:46,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216907486] [2024-11-08 17:53:46,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:53:46,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:53:46,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:53:46,031 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:53:46,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 17:53:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:53:46,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-08 17:53:46,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:53:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:53:46,692 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:53:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:53:50,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216907486] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:53:50,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:53:50,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2024-11-08 17:53:50,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801641200] [2024-11-08 17:53:50,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:53:50,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2024-11-08 17:53:50,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:53:50,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2024-11-08 17:53:50,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2024-11-08 17:53:50,578 INFO L87 Difference]: Start difference. First operand 227 states and 235 transitions. Second operand has 99 states, 99 states have (on average 3.9696969696969697) internal successors, (393), 99 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:51,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:53:51,391 INFO L93 Difference]: Finished difference Result 423 states and 431 transitions. [2024-11-08 17:53:51,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2024-11-08 17:53:51,393 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 3.9696969696969697) internal successors, (393), 99 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 198 [2024-11-08 17:53:51,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:53:51,397 INFO L225 Difference]: With dead ends: 423 [2024-11-08 17:53:51,399 INFO L226 Difference]: Without dead ends: 423 [2024-11-08 17:53:51,402 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2024-11-08 17:53:51,403 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-08 17:53:51,404 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 78 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-08 17:53:51,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2024-11-08 17:53:51,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 423. [2024-11-08 17:53:51,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 421 states have (on average 1.0237529691211402) internal successors, (431), 422 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:51,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 431 transitions. [2024-11-08 17:53:51,426 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 431 transitions. Word has length 198 [2024-11-08 17:53:51,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:53:51,427 INFO L471 AbstractCegarLoop]: Abstraction has 423 states and 431 transitions. [2024-11-08 17:53:51,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 3.9696969696969697) internal successors, (393), 99 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:53:51,428 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 431 transitions. [2024-11-08 17:53:51,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2024-11-08 17:53:51,449 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:53:51,449 INFO L215 NwaCegarLoop]: trace histogram [96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:53:51,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-08 17:53:51,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:53:51,650 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 17:53:51,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:53:51,651 INFO L85 PathProgramCache]: Analyzing trace with hash -2034558706, now seen corresponding path program 2 times [2024-11-08 17:53:51,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:53:51,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389729872] [2024-11-08 17:53:51,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:53:51,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:53:51,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:54:02,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:54:02,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389729872] [2024-11-08 17:54:02,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389729872] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:54:02,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347397603] [2024-11-08 17:54:02,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:54:02,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:54:02,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:54:02,223 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:54:02,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 17:54:02,443 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-08 17:54:02,443 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:54:02,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 17:54:02,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:54:04,410 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~p~0#1.base_21| Int)) (and (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~p~0#1.base_21| 0)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~p~0#1.base_21|) 0))) is different from true [2024-11-08 17:54:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18336 trivial. 0 not checked. [2024-11-08 17:54:04,421 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:54:04,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347397603] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:54:04,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 17:54:04,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [99] total 101 [2024-11-08 17:54:04,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817407409] [2024-11-08 17:54:04,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:54:04,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:54:04,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:54:04,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:54:04,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4855, Invalid=5048, Unknown=1, NotChecked=196, Total=10100 [2024-11-08 17:54:04,429 INFO L87 Difference]: Start difference. First operand 423 states and 431 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:54:04,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:54:04,465 INFO L93 Difference]: Finished difference Result 422 states and 430 transitions. [2024-11-08 17:54:04,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:54:04,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 394 [2024-11-08 17:54:04,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:54:04,468 INFO L225 Difference]: With dead ends: 422 [2024-11-08 17:54:04,468 INFO L226 Difference]: Without dead ends: 418 [2024-11-08 17:54:04,471 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4855, Invalid=5048, Unknown=1, NotChecked=196, Total=10100 [2024-11-08 17:54:04,472 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 17:54:04,472 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 12 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 20 Unchecked, 0.0s Time] [2024-11-08 17:54:04,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2024-11-08 17:54:04,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 418. [2024-11-08 17:54:04,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.014388489208633) internal successors, (423), 417 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:54:04,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 423 transitions. [2024-11-08 17:54:04,483 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 423 transitions. Word has length 394 [2024-11-08 17:54:04,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:54:04,484 INFO L471 AbstractCegarLoop]: Abstraction has 418 states and 423 transitions. [2024-11-08 17:54:04,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:54:04,485 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 423 transitions. [2024-11-08 17:54:04,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2024-11-08 17:54:04,494 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:54:04,495 INFO L215 NwaCegarLoop]: trace histogram [96, 96, 96, 96, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-08 17:54:04,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-08 17:54:04,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:54:04,699 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 17:54:04,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:54:04,700 INFO L85 PathProgramCache]: Analyzing trace with hash -337392492, now seen corresponding path program 4 times [2024-11-08 17:54:04,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:54:04,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001284605] [2024-11-08 17:54:04,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:54:04,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:54:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 18358 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-08 17:54:14,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:54:14,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001284605] [2024-11-08 17:54:14,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001284605] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:54:14,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297596981] [2024-11-08 17:54:14,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 17:54:14,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:54:14,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:54:14,678 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:54:14,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 17:57:30,836 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 17:57:30,836 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:57:30,882 INFO L255 TraceCheckSpWp]: Trace formula consists of 1438 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-08 17:57:30,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:57:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 18358 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-08 17:57:31,625 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:57:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 18358 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-08 17:57:46,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297596981] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:57:46,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:57:46,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 197 [2024-11-08 17:57:46,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360377639] [2024-11-08 17:57:46,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:57:46,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2024-11-08 17:57:46,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:57:46,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2024-11-08 17:57:46,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2024-11-08 17:57:46,531 INFO L87 Difference]: Start difference. First operand 418 states and 423 transitions. Second operand has 197 states, 197 states have (on average 3.9746192893401013) internal successors, (783), 197 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:57:49,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:57:49,044 INFO L93 Difference]: Finished difference Result 810 states and 815 transitions. [2024-11-08 17:57:49,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2024-11-08 17:57:49,046 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 197 states have (on average 3.9746192893401013) internal successors, (783), 197 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 401 [2024-11-08 17:57:49,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:57:49,050 INFO L225 Difference]: With dead ends: 810 [2024-11-08 17:57:49,050 INFO L226 Difference]: Without dead ends: 810 [2024-11-08 17:57:49,055 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 899 GetRequests, 704 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2024-11-08 17:57:49,056 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:57:49,056 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 93 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-08 17:57:49,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2024-11-08 17:57:49,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 810. [2024-11-08 17:57:49,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 1.0074165636588381) internal successors, (815), 809 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:57:49,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 815 transitions. [2024-11-08 17:57:49,075 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 815 transitions. Word has length 401 [2024-11-08 17:57:49,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:57:49,076 INFO L471 AbstractCegarLoop]: Abstraction has 810 states and 815 transitions. [2024-11-08 17:57:49,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 197 states have (on average 3.9746192893401013) internal successors, (783), 197 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:57:49,077 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 815 transitions. [2024-11-08 17:57:49,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 794 [2024-11-08 17:57:49,085 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:57:49,086 INFO L215 NwaCegarLoop]: trace histogram [194, 194, 194, 194, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-08 17:57:49,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-08 17:57:49,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-08 17:57:49,286 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 17:57:49,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:57:49,287 INFO L85 PathProgramCache]: Analyzing trace with hash 333988996, now seen corresponding path program 5 times [2024-11-08 17:57:49,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:57:49,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498287833] [2024-11-08 17:57:49,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:57:49,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:57:49,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:58:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 75100 backedges. 0 proven. 75078 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-08 17:58:28,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:58:28,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498287833] [2024-11-08 17:58:28,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498287833] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:58:28,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851853237] [2024-11-08 17:58:28,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 17:58:28,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:58:28,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:58:28,679 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:58:28,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44bac985-172d-4f8c-8f2c-9a8442591218/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process