./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 71679b2a85162a2bf4315b62ab1893b5cfd06e20fc9e264973bd31bc9d08e300 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 12:57:34,793 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 12:57:34,889 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-13 12:57:34,898 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 12:57:34,899 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 12:57:34,935 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 12:57:34,935 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 12:57:34,936 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 12:57:34,936 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 12:57:34,936 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 12:57:34,936 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 12:57:34,936 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 12:57:34,937 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 12:57:34,938 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 12:57:34,939 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 12:57:34,939 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 12:57:34,939 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 12:57:34,939 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 12:57:34,940 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 12:57:34,940 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 12:57:34,940 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-13 12:57:34,940 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-13 12:57:34,940 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-13 12:57:34,940 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 12:57:34,940 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 12:57:34,940 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 12:57:34,941 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 12:57:34,941 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 12:57:34,941 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 12:57:34,941 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 12:57:34,941 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 12:57:34,942 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 12:57:34,942 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 12:57:34,942 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 12:57:34,942 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 12:57:34,942 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 12:57:34,942 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 12:57:34,943 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 12:57:34,943 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 12:57:34,943 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 12:57:34,943 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 12:57:34,943 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 12:57:34,943 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71679b2a85162a2bf4315b62ab1893b5cfd06e20fc9e264973bd31bc9d08e300 [2024-11-13 12:57:35,263 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 12:57:35,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 12:57:35,279 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 12:57:35,281 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 12:57:35,281 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 12:57:35,284 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i Unable to find full path for "g++" [2024-11-13 12:57:37,108 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 12:57:37,492 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 12:57:37,496 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2024-11-13 12:57:37,517 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/data/bc7130ccf/1e047eede2214af4bbb518ff4c96d6ee/FLAG373b00bf8 [2024-11-13 12:57:37,543 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/data/bc7130ccf/1e047eede2214af4bbb518ff4c96d6ee [2024-11-13 12:57:37,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 12:57:37,547 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 12:57:37,551 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 12:57:37,551 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 12:57:37,556 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 12:57:37,557 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 12:57:37" (1/1) ... [2024-11-13 12:57:37,558 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@371018d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:57:37, skipping insertion in model container [2024-11-13 12:57:37,558 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 12:57:37" (1/1) ... [2024-11-13 12:57:37,603 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 12:57:37,961 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-13 12:57:37,965 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 12:57:37,979 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 12:57:38,021 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 12:57:38,050 INFO L204 MainTranslator]: Completed translation [2024-11-13 12:57:38,050 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:57:38 WrapperNode [2024-11-13 12:57:38,051 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 12:57:38,052 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 12:57:38,052 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 12:57:38,052 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 12:57:38,059 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:57:38" (1/1) ... [2024-11-13 12:57:38,073 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:57:38" (1/1) ... [2024-11-13 12:57:38,092 INFO L138 Inliner]: procedures = 117, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2024-11-13 12:57:38,092 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 12:57:38,093 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 12:57:38,093 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 12:57:38,093 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 12:57:38,102 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:57:38" (1/1) ... [2024-11-13 12:57:38,102 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:57:38" (1/1) ... [2024-11-13 12:57:38,105 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:57:38" (1/1) ... [2024-11-13 12:57:38,122 INFO L175 MemorySlicer]: Split 5 memory accesses to 1 slices as follows [5]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 2 writes are split as follows [2]. [2024-11-13 12:57:38,122 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:57:38" (1/1) ... [2024-11-13 12:57:38,122 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:57:38" (1/1) ... [2024-11-13 12:57:38,132 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:57:38" (1/1) ... [2024-11-13 12:57:38,140 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:57:38" (1/1) ... [2024-11-13 12:57:38,143 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:57:38" (1/1) ... [2024-11-13 12:57:38,144 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:57:38" (1/1) ... [2024-11-13 12:57:38,146 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 12:57:38,150 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 12:57:38,150 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 12:57:38,150 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 12:57:38,151 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:57:38" (1/1) ... [2024-11-13 12:57:38,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 12:57:38,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:57:38,195 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 12:57:38,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 12:57:38,231 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 12:57:38,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 12:57:38,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 12:57:38,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 12:57:38,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 12:57:38,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 12:57:38,346 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 12:57:38,347 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 12:57:38,513 INFO L? ?]: Removed 41 outVars from TransFormulas that were not future-live. [2024-11-13 12:57:38,513 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 12:57:38,523 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 12:57:38,524 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-13 12:57:38,524 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 12:57:38 BoogieIcfgContainer [2024-11-13 12:57:38,524 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 12:57:38,526 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 12:57:38,526 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 12:57:38,532 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 12:57:38,532 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 12:57:37" (1/3) ... [2024-11-13 12:57:38,533 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15233800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 12:57:38, skipping insertion in model container [2024-11-13 12:57:38,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:57:38" (2/3) ... [2024-11-13 12:57:38,533 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15233800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 12:57:38, skipping insertion in model container [2024-11-13 12:57:38,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 12:57:38" (3/3) ... [2024-11-13 12:57:38,535 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrchr-alloca-2.i [2024-11-13 12:57:38,553 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 12:57:38,554 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG cstrchr-alloca-2.i that has 1 procedures, 33 locations, 1 initial locations, 2 loop locations, and 11 error locations. [2024-11-13 12:57:38,600 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 12:57:38,615 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;@3c7d3a0e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 12:57:38,616 INFO L334 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2024-11-13 12:57:38,620 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:38,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-13 12:57:38,627 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:38,628 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-13 12:57:38,628 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:57:38,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:38,634 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2024-11-13 12:57:38,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:57:38,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599986576] [2024-11-13 12:57:38,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:38,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:57:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:38,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:38,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:57:38,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599986576] [2024-11-13 12:57:38,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599986576] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:57:38,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:57:38,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:57:38,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821708213] [2024-11-13 12:57:38,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:57:38,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:57:38,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:57:39,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:57:39,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:57:39,012 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 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 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:39,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:39,078 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2024-11-13 12:57:39,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:57:39,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-13 12:57:39,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:39,088 INFO L225 Difference]: With dead ends: 38 [2024-11-13 12:57:39,089 INFO L226 Difference]: Without dead ends: 36 [2024-11-13 12:57:39,092 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:57:39,096 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 3 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:39,097 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 60 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:57:39,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-13 12:57:39,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2024-11-13 12:57:39,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 32 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) [2024-11-13 12:57:39,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2024-11-13 12:57:39,143 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 6 [2024-11-13 12:57:39,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:39,144 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2024-11-13 12:57:39,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:39,144 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2024-11-13 12:57:39,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-13 12:57:39,145 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:39,145 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-13 12:57:39,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 12:57:39,146 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:57:39,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:39,147 INFO L85 PathProgramCache]: Analyzing trace with hash 889568455, now seen corresponding path program 1 times [2024-11-13 12:57:39,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:57:39,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429482051] [2024-11-13 12:57:39,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:39,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:57:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:39,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:39,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:57:39,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429482051] [2024-11-13 12:57:39,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429482051] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:57:39,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:57:39,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 12:57:39,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711467396] [2024-11-13 12:57:39,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:57:39,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 12:57:39,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:57:39,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 12:57:39,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:57:39,263 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:39,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:39,304 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2024-11-13 12:57:39,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 12:57:39,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-13 12:57:39,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:39,307 INFO L225 Difference]: With dead ends: 31 [2024-11-13 12:57:39,307 INFO L226 Difference]: Without dead ends: 31 [2024-11-13 12:57:39,307 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 [2024-11-13 12:57:39,308 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 5 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:39,308 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 39 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:57:39,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-13 12:57:39,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-13 12:57:39,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.5454545454545454) 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) [2024-11-13 12:57:39,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2024-11-13 12:57:39,318 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 6 [2024-11-13 12:57:39,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:39,320 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2024-11-13 12:57:39,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:39,322 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2024-11-13 12:57:39,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-13 12:57:39,322 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:39,322 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-13 12:57:39,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 12:57:39,323 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:57:39,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:39,323 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2024-11-13 12:57:39,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:57:39,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863218411] [2024-11-13 12:57:39,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:39,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:57:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:39,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:39,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:57:39,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863218411] [2024-11-13 12:57:39,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863218411] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:57:39,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:57:39,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:57:39,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518435337] [2024-11-13 12:57:39,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:57:39,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 12:57:39,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:57:39,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 12:57:39,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 12:57:39,702 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:39,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:39,863 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2024-11-13 12:57:39,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 12:57:39,864 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-13 12:57:39,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:39,865 INFO L225 Difference]: With dead ends: 34 [2024-11-13 12:57:39,865 INFO L226 Difference]: Without dead ends: 34 [2024-11-13 12:57:39,865 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:57:39,867 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:39,870 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 69 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:57:39,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-13 12:57:39,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2024-11-13 12:57:39,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:39,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-11-13 12:57:39,880 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2024-11-13 12:57:39,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:39,880 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-11-13 12:57:39,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:39,881 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-11-13 12:57:39,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-13 12:57:39,881 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:39,881 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:39,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 12:57:39,882 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:57:39,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:39,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1804969579, now seen corresponding path program 1 times [2024-11-13 12:57:39,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:57:39,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465840767] [2024-11-13 12:57:39,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:39,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:57:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:40,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:40,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:57:40,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465840767] [2024-11-13 12:57:40,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465840767] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:57:40,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:57:40,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 12:57:40,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979379012] [2024-11-13 12:57:40,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:57:40,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:57:40,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:57:40,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:57:40,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:57:40,192 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:40,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:40,258 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2024-11-13 12:57:40,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:57:40,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2024-11-13 12:57:40,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:40,259 INFO L225 Difference]: With dead ends: 35 [2024-11-13 12:57:40,259 INFO L226 Difference]: Without dead ends: 35 [2024-11-13 12:57:40,259 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:57:40,260 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:40,261 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:57:40,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-13 12:57:40,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-13 12:57:40,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.5) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:40,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2024-11-13 12:57:40,266 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 7 [2024-11-13 12:57:40,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:40,266 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2024-11-13 12:57:40,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:40,266 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2024-11-13 12:57:40,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-13 12:57:40,267 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:40,271 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:40,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 12:57:40,271 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:57:40,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:40,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1806816621, now seen corresponding path program 1 times [2024-11-13 12:57:40,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:57:40,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983387067] [2024-11-13 12:57:40,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:40,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:57:40,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:40,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:40,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:57:40,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983387067] [2024-11-13 12:57:40,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983387067] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:57:40,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:57:40,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:57:40,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290050941] [2024-11-13 12:57:40,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:57:40,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 12:57:40,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:57:40,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 12:57:40,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-13 12:57:40,582 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:40,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:40,634 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2024-11-13 12:57:40,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 12:57:40,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2024-11-13 12:57:40,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:40,636 INFO L225 Difference]: With dead ends: 38 [2024-11-13 12:57:40,636 INFO L226 Difference]: Without dead ends: 38 [2024-11-13 12:57:40,637 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-13 12:57:40,638 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:40,638 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 46 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:57:40,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-13 12:57:40,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2024-11-13 12:57:40,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.5) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:40,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2024-11-13 12:57:40,644 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 7 [2024-11-13 12:57:40,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:40,645 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2024-11-13 12:57:40,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:40,645 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2024-11-13 12:57:40,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-13 12:57:40,645 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:40,645 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:40,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-13 12:57:40,646 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:57:40,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:40,646 INFO L85 PathProgramCache]: Analyzing trace with hash -591023154, now seen corresponding path program 1 times [2024-11-13 12:57:40,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:57:40,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461106834] [2024-11-13 12:57:40,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:40,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:57:40,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:40,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:40,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:57:40,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461106834] [2024-11-13 12:57:40,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461106834] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:57:40,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:57:40,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 12:57:40,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67152655] [2024-11-13 12:57:40,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:57:40,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:57:40,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:57:40,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:57:40,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:57:40,776 INFO L87 Difference]: Start difference. First operand 35 states and 39 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) [2024-11-13 12:57:40,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:40,844 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2024-11-13 12:57:40,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:57:40,845 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 9 [2024-11-13 12:57:40,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:40,845 INFO L225 Difference]: With dead ends: 32 [2024-11-13 12:57:40,845 INFO L226 Difference]: Without dead ends: 32 [2024-11-13 12:57:40,846 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:57:40,846 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 13 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:40,847 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 29 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:57:40,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-13 12:57:40,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-13 12:57:40,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.3846153846153846) 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) [2024-11-13 12:57:40,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-11-13 12:57:40,851 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 9 [2024-11-13 12:57:40,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:40,851 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-11-13 12:57:40,851 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) [2024-11-13 12:57:40,851 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-11-13 12:57:40,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-13 12:57:40,851 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:40,852 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:40,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 12:57:40,852 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:57:40,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:40,853 INFO L85 PathProgramCache]: Analyzing trace with hash -591023153, now seen corresponding path program 1 times [2024-11-13 12:57:40,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:57:40,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517819365] [2024-11-13 12:57:40,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:40,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:57:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:41,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:41,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:57:41,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517819365] [2024-11-13 12:57:41,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517819365] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:57:41,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:57:41,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 12:57:41,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326396475] [2024-11-13 12:57:41,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:57:41,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 12:57:41,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:57:41,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 12:57:41,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:57:41,037 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 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) [2024-11-13 12:57:41,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:41,140 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2024-11-13 12:57:41,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 12:57:41,141 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 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 9 [2024-11-13 12:57:41,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:41,141 INFO L225 Difference]: With dead ends: 40 [2024-11-13 12:57:41,142 INFO L226 Difference]: Without dead ends: 40 [2024-11-13 12:57:41,142 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:57:41,143 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 19 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:41,143 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 52 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:57:41,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-13 12:57:41,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2024-11-13 12:57:41,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 38 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) [2024-11-13 12:57:41,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2024-11-13 12:57:41,148 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 9 [2024-11-13 12:57:41,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:41,148 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2024-11-13 12:57:41,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 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) [2024-11-13 12:57:41,149 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2024-11-13 12:57:41,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-13 12:57:41,151 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:41,151 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:41,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-13 12:57:41,151 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:57:41,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:41,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1185617522, now seen corresponding path program 1 times [2024-11-13 12:57:41,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:57:41,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101076850] [2024-11-13 12:57:41,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:41,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:57:41,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:41,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:57:41,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101076850] [2024-11-13 12:57:41,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101076850] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:57:41,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506408322] [2024-11-13 12:57:41,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:41,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:41,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:57:41,551 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:57:41,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 12:57:41,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:41,652 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 12:57:41,658 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:57:41,742 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 7 [2024-11-13 12:57:42,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:42,041 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:57:42,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:42,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506408322] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:57:42,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:57:42,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-13 12:57:42,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142923690] [2024-11-13 12:57:42,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:57:42,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 12:57:42,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:57:42,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 12:57:42,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-11-13 12:57:42,391 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 17 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:42,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:42,734 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2024-11-13 12:57:42,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 12:57:42,734 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 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 [2024-11-13 12:57:42,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:42,735 INFO L225 Difference]: With dead ends: 40 [2024-11-13 12:57:42,735 INFO L226 Difference]: Without dead ends: 40 [2024-11-13 12:57:42,735 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2024-11-13 12:57:42,736 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:42,736 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 110 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:57:42,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-13 12:57:42,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2024-11-13 12:57:42,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.34375) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:42,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2024-11-13 12:57:42,740 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 9 [2024-11-13 12:57:42,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:42,740 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2024-11-13 12:57:42,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:42,741 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2024-11-13 12:57:42,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-13 12:57:42,741 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:42,741 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:42,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 12:57:42,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:42,945 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:57:42,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:42,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1900564221, now seen corresponding path program 1 times [2024-11-13 12:57:42,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:57:42,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184293161] [2024-11-13 12:57:42,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:42,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:57:42,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:43,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:57:43,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184293161] [2024-11-13 12:57:43,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184293161] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:57:43,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:57:43,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 12:57:43,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223564466] [2024-11-13 12:57:43,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:57:43,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 12:57:43,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:57:43,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 12:57:43,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:57:43,290 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:43,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:43,337 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2024-11-13 12:57:43,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 12:57:43,338 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2024-11-13 12:57:43,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:43,338 INFO L225 Difference]: With dead ends: 36 [2024-11-13 12:57:43,338 INFO L226 Difference]: Without dead ends: 36 [2024-11-13 12:57:43,339 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:57:43,339 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:43,340 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 38 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:57:43,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-13 12:57:43,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2024-11-13 12:57:43,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:43,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2024-11-13 12:57:43,344 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 10 [2024-11-13 12:57:43,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:43,344 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2024-11-13 12:57:43,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:43,344 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2024-11-13 12:57:43,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-13 12:57:43,345 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:43,345 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:43,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-13 12:57:43,345 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:57:43,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:43,346 INFO L85 PathProgramCache]: Analyzing trace with hash -670166554, now seen corresponding path program 1 times [2024-11-13 12:57:43,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:57:43,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889106904] [2024-11-13 12:57:43,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:43,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:57:43,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:43,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:43,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:57:43,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889106904] [2024-11-13 12:57:43,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889106904] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:57:43,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:57:43,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 12:57:43,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649211035] [2024-11-13 12:57:43,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:57:43,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 12:57:43,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:57:43,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 12:57:43,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:57:43,379 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:43,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:43,392 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2024-11-13 12:57:43,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 12:57:43,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-13 12:57:43,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:43,393 INFO L225 Difference]: With dead ends: 35 [2024-11-13 12:57:43,393 INFO L226 Difference]: Without dead ends: 35 [2024-11-13 12:57:43,394 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 [2024-11-13 12:57:43,394 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 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 [2024-11-13 12:57:43,395 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:57:43,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-13 12:57:43,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-13 12:57:43,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:43,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2024-11-13 12:57:43,398 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 13 [2024-11-13 12:57:43,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:43,398 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2024-11-13 12:57:43,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:43,399 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2024-11-13 12:57:43,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-13 12:57:43,402 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:43,402 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:43,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-13 12:57:43,402 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:57:43,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:43,403 INFO L85 PathProgramCache]: Analyzing trace with hash 209176483, now seen corresponding path program 1 times [2024-11-13 12:57:43,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:57:43,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497436357] [2024-11-13 12:57:43,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:43,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:57:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:43,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:43,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:57:43,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497436357] [2024-11-13 12:57:43,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497436357] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:57:43,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:57:43,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-13 12:57:43,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072763272] [2024-11-13 12:57:43,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:57:43,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 12:57:43,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:57:43,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 12:57:43,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-13 12:57:43,646 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:43,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:43,778 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2024-11-13 12:57:43,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 12:57:43,779 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-13 12:57:43,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:43,779 INFO L225 Difference]: With dead ends: 44 [2024-11-13 12:57:43,780 INFO L226 Difference]: Without dead ends: 44 [2024-11-13 12:57:43,780 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-13 12:57:43,781 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:43,782 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 96 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:57:43,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-13 12:57:43,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2024-11-13 12:57:43,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:43,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2024-11-13 12:57:43,787 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 15 [2024-11-13 12:57:43,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:43,787 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2024-11-13 12:57:43,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:43,787 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2024-11-13 12:57:43,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-13 12:57:43,787 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:43,788 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:43,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-13 12:57:43,791 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:57:43,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:43,792 INFO L85 PathProgramCache]: Analyzing trace with hash -377629531, now seen corresponding path program 1 times [2024-11-13 12:57:43,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:57:43,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758784516] [2024-11-13 12:57:43,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:43,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:57:43,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:44,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:57:44,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758784516] [2024-11-13 12:57:44,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758784516] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:57:44,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:57:44,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-13 12:57:44,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152134128] [2024-11-13 12:57:44,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:57:44,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 12:57:44,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:57:44,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 12:57:44,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-13 12:57:44,045 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:44,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:44,179 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2024-11-13 12:57:44,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 12:57:44,180 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-13 12:57:44,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:44,181 INFO L225 Difference]: With dead ends: 53 [2024-11-13 12:57:44,181 INFO L226 Difference]: Without dead ends: 53 [2024-11-13 12:57:44,181 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-13 12:57:44,182 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:44,185 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 85 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:57:44,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-13 12:57:44,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2024-11-13 12:57:44,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.263157894736842) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:44,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2024-11-13 12:57:44,192 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 15 [2024-11-13 12:57:44,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:44,193 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2024-11-13 12:57:44,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:44,193 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2024-11-13 12:57:44,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-13 12:57:44,194 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:44,194 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:44,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-13 12:57:44,194 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:57:44,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:44,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1925011968, now seen corresponding path program 1 times [2024-11-13 12:57:44,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:57:44,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506606536] [2024-11-13 12:57:44,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:44,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:57:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:44,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:44,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:57:44,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506606536] [2024-11-13 12:57:44,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506606536] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:57:44,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:57:44,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 12:57:44,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436948531] [2024-11-13 12:57:44,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:57:44,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:57:44,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:57:44,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:57:44,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:57:44,295 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:44,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:44,316 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2024-11-13 12:57:44,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:57:44,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2024-11-13 12:57:44,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:44,317 INFO L225 Difference]: With dead ends: 41 [2024-11-13 12:57:44,317 INFO L226 Difference]: Without dead ends: 28 [2024-11-13 12:57:44,318 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:57:44,318 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:44,319 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:57:44,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-13 12:57:44,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-13 12:57:44,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:44,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2024-11-13 12:57:44,321 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 16 [2024-11-13 12:57:44,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:44,322 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2024-11-13 12:57:44,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:44,322 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2024-11-13 12:57:44,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-13 12:57:44,322 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:44,322 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:44,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-13 12:57:44,323 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:57:44,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:44,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1567507909, now seen corresponding path program 1 times [2024-11-13 12:57:44,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:57:44,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529190595] [2024-11-13 12:57:44,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:44,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:57:44,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:44,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:57:44,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529190595] [2024-11-13 12:57:44,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529190595] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:57:44,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610048107] [2024-11-13 12:57:44,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:44,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:44,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:57:44,688 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:57:44,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 12:57:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:44,775 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-13 12:57:44,780 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:57:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:44,947 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:57:45,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-13 12:57:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:45,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610048107] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:57:45,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:57:45,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-13 12:57:45,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252286120] [2024-11-13 12:57:45,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:57:45,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 12:57:45,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:57:45,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 12:57:45,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-11-13 12:57:45,133 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 17 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:45,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:45,273 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2024-11-13 12:57:45,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 12:57:45,274 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-13 12:57:45,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:45,274 INFO L225 Difference]: With dead ends: 36 [2024-11-13 12:57:45,276 INFO L226 Difference]: Without dead ends: 32 [2024-11-13 12:57:45,277 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2024-11-13 12:57:45,278 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:45,278 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 98 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:57:45,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-13 12:57:45,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2024-11-13 12:57:45,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:45,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2024-11-13 12:57:45,284 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2024-11-13 12:57:45,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:45,284 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2024-11-13 12:57:45,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:45,284 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2024-11-13 12:57:45,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-13 12:57:45,284 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:45,285 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:45,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 12:57:45,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-13 12:57:45,485 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:57:45,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:45,486 INFO L85 PathProgramCache]: Analyzing trace with hash -3650289, now seen corresponding path program 2 times [2024-11-13 12:57:45,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:57:45,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687642206] [2024-11-13 12:57:45,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:45,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:57:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:46,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:57:46,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687642206] [2024-11-13 12:57:46,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687642206] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:57:46,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882809470] [2024-11-13 12:57:46,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:57:46,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:46,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:57:46,018 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:57:46,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 12:57:46,116 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:57:46,116 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:57:46,117 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-13 12:57:46,121 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:57:46,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:57:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:46,375 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:57:46,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 12:57:46,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 12:57:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:46,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882809470] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:57:46,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:57:46,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2024-11-13 12:57:46,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399180561] [2024-11-13 12:57:46,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:57:46,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-13 12:57:46,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:57:46,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-13 12:57:46,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2024-11-13 12:57:46,519 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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) [2024-11-13 12:57:46,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:46,783 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2024-11-13 12:57:46,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 12:57:46,784 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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) Word has length 24 [2024-11-13 12:57:46,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:46,785 INFO L225 Difference]: With dead ends: 42 [2024-11-13 12:57:46,785 INFO L226 Difference]: Without dead ends: 30 [2024-11-13 12:57:46,785 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2024-11-13 12:57:46,786 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:46,786 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 73 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:57:46,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-13 12:57:46,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2024-11-13 12:57:46,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:46,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2024-11-13 12:57:46,789 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2024-11-13 12:57:46,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:46,789 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2024-11-13 12:57:46,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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) [2024-11-13 12:57:46,789 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2024-11-13 12:57:46,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-13 12:57:46,790 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:46,790 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:46,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-13 12:57:46,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-13 12:57:46,991 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:57:46,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:46,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1588703175, now seen corresponding path program 3 times [2024-11-13 12:57:46,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:57:46,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042972583] [2024-11-13 12:57:46,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:46,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:57:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:47,340 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:47,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:57:47,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042972583] [2024-11-13 12:57:47,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042972583] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:57:47,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001358216] [2024-11-13 12:57:47,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 12:57:47,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:47,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:57:47,343 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:57:47,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 12:57:47,439 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 12:57:47,440 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:57:47,441 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-13 12:57:47,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:57:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:47,657 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:57:47,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-13 12:57:47,957 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:47,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001358216] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:57:47,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:57:47,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-11-13 12:57:47,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637256585] [2024-11-13 12:57:47,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:57:47,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 12:57:47,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:57:47,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 12:57:47,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-11-13 12:57:47,959 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 21 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:48,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:48,152 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2024-11-13 12:57:48,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 12:57:48,153 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-13 12:57:48,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:48,153 INFO L225 Difference]: With dead ends: 39 [2024-11-13 12:57:48,153 INFO L226 Difference]: Without dead ends: 39 [2024-11-13 12:57:48,154 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2024-11-13 12:57:48,154 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:48,154 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 141 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:57:48,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-13 12:57:48,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2024-11-13 12:57:48,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 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) [2024-11-13 12:57:48,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2024-11-13 12:57:48,158 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 27 [2024-11-13 12:57:48,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:48,158 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2024-11-13 12:57:48,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:48,158 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2024-11-13 12:57:48,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-13 12:57:48,161 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:48,161 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:48,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 12:57:48,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-13 12:57:48,362 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:57:48,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:48,363 INFO L85 PathProgramCache]: Analyzing trace with hash 2121264269, now seen corresponding path program 4 times [2024-11-13 12:57:48,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:57:48,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646598293] [2024-11-13 12:57:48,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:48,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:57:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:48,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:57:48,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646598293] [2024-11-13 12:57:48,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646598293] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:57:48,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086947253] [2024-11-13 12:57:48,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 12:57:48,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:48,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:57:48,862 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:57:48,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 12:57:48,963 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 12:57:48,963 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:57:48,965 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-13 12:57:48,969 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:57:49,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:57:49,188 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:49,189 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:57:49,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 12:57:49,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 12:57:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:49,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086947253] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:57:49,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:57:49,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2024-11-13 12:57:49,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617421560] [2024-11-13 12:57:49,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:57:49,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-13 12:57:49,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:57:49,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-13 12:57:49,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2024-11-13 12:57:49,335 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:49,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:49,636 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2024-11-13 12:57:49,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 12:57:49,637 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 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 33 [2024-11-13 12:57:49,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:49,640 INFO L225 Difference]: With dead ends: 57 [2024-11-13 12:57:49,640 INFO L226 Difference]: Without dead ends: 39 [2024-11-13 12:57:49,641 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2024-11-13 12:57:49,641 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:49,642 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 130 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:57:49,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-13 12:57:49,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2024-11-13 12:57:49,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:49,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2024-11-13 12:57:49,646 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 33 [2024-11-13 12:57:49,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:49,647 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2024-11-13 12:57:49,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:49,647 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2024-11-13 12:57:49,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-13 12:57:49,650 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:49,650 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:49,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 12:57:49,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-13 12:57:49,856 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:57:49,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:49,856 INFO L85 PathProgramCache]: Analyzing trace with hash 604625059, now seen corresponding path program 5 times [2024-11-13 12:57:49,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:57:49,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471195959] [2024-11-13 12:57:49,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:49,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:57:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:50,373 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:50,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:57:50,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471195959] [2024-11-13 12:57:50,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471195959] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:57:50,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434384247] [2024-11-13 12:57:50,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 12:57:50,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:50,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:57:50,376 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:57:50,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 12:57:50,510 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-13 12:57:50,510 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:57:50,512 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-13 12:57:50,516 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:57:50,527 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 [2024-11-13 12:57:50,855 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:50,855 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:57:51,456 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:51,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434384247] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:57:51,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:57:51,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2024-11-13 12:57:51,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279033905] [2024-11-13 12:57:51,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:57:51,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-13 12:57:51,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:57:51,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-13 12:57:51,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2024-11-13 12:57:51,459 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 26 states, 25 states have (on average 3.56) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:51,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:51,804 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2024-11-13 12:57:51,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 12:57:51,805 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.56) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 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 36 [2024-11-13 12:57:51,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:51,807 INFO L225 Difference]: With dead ends: 48 [2024-11-13 12:57:51,807 INFO L226 Difference]: Without dead ends: 48 [2024-11-13 12:57:51,808 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2024-11-13 12:57:51,808 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:51,809 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 214 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 12:57:51,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-13 12:57:51,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2024-11-13 12:57:51,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 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) [2024-11-13 12:57:51,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2024-11-13 12:57:51,816 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 36 [2024-11-13 12:57:51,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:51,817 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2024-11-13 12:57:51,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.56) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:51,817 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2024-11-13 12:57:51,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-13 12:57:51,818 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:51,818 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:51,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 12:57:52,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-13 12:57:52,019 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:57:52,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:52,019 INFO L85 PathProgramCache]: Analyzing trace with hash -4588169, now seen corresponding path program 6 times [2024-11-13 12:57:52,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:57:52,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062438052] [2024-11-13 12:57:52,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:52,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:57:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 13 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:52,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:57:52,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062438052] [2024-11-13 12:57:52,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062438052] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:57:52,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189875259] [2024-11-13 12:57:52,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 12:57:52,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:52,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:57:52,704 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:57:52,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 12:57:52,830 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-13 12:57:52,830 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:57:52,832 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-13 12:57:52,836 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:57:53,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:57:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 13 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:53,120 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:57:53,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 12:57:53,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 12:57:53,290 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 13 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:53,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189875259] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:57:53,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:57:53,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 25 [2024-11-13 12:57:53,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558468514] [2024-11-13 12:57:53,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:57:53,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-13 12:57:53,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:57:53,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-13 12:57:53,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2024-11-13 12:57:53,292 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:53,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:53,712 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2024-11-13 12:57:53,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-13 12:57:53,713 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 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 42 [2024-11-13 12:57:53,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:53,713 INFO L225 Difference]: With dead ends: 72 [2024-11-13 12:57:53,713 INFO L226 Difference]: Without dead ends: 48 [2024-11-13 12:57:53,714 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2024-11-13 12:57:53,714 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 11 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:53,715 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 193 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 12:57:53,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-13 12:57:53,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2024-11-13 12:57:53,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:53,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2024-11-13 12:57:53,718 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 42 [2024-11-13 12:57:53,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:53,718 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2024-11-13 12:57:53,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:53,718 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2024-11-13 12:57:53,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-13 12:57:53,719 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:53,719 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:53,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 12:57:53,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:53,920 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:57:53,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:53,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1222199841, now seen corresponding path program 7 times [2024-11-13 12:57:53,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:57:53,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519743760] [2024-11-13 12:57:53,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:53,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:57:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:54,526 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:54,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:57:54,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519743760] [2024-11-13 12:57:54,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519743760] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:57:54,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6899378] [2024-11-13 12:57:54,527 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 12:57:54,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:54,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:57:54,529 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:57:54,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 12:57:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:54,646 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-13 12:57:54,649 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:57:54,956 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 12 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:54,956 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:57:55,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-13 12:57:55,427 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 12 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:55,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6899378] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:57:55,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:57:55,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 27 [2024-11-13 12:57:55,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779689015] [2024-11-13 12:57:55,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:57:55,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-13 12:57:55,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:57:55,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-13 12:57:55,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2024-11-13 12:57:55,431 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 28 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 28 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) [2024-11-13 12:57:55,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:55,824 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2024-11-13 12:57:55,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 12:57:55,825 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 28 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 45 [2024-11-13 12:57:55,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:55,826 INFO L225 Difference]: With dead ends: 57 [2024-11-13 12:57:55,826 INFO L226 Difference]: Without dead ends: 57 [2024-11-13 12:57:55,826 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2024-11-13 12:57:55,827 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:55,827 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 234 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 12:57:55,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-13 12:57:55,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2024-11-13 12:57:55,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:55,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2024-11-13 12:57:55,832 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 45 [2024-11-13 12:57:55,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:55,833 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2024-11-13 12:57:55,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 28 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) [2024-11-13 12:57:55,834 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2024-11-13 12:57:55,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-13 12:57:55,838 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:55,838 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:55,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 12:57:56,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:56,043 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:57:56,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:56,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1228810123, now seen corresponding path program 8 times [2024-11-13 12:57:56,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:57:56,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762922929] [2024-11-13 12:57:56,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:56,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:57:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:56,952 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 17 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:56,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:57:56,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762922929] [2024-11-13 12:57:56,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762922929] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:57:56,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737030628] [2024-11-13 12:57:56,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:57:56,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:56,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:57:56,955 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:57:56,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 12:57:57,114 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:57:57,115 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:57:57,117 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-13 12:57:57,128 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:57:57,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:57:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 17 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:57,515 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:57:57,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 12:57:57,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 12:57:57,724 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 17 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:57,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737030628] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:57:57,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:57:57,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 28 [2024-11-13 12:57:57,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983051460] [2024-11-13 12:57:57,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:57:57,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-13 12:57:57,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:57:57,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-13 12:57:57,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2024-11-13 12:57:57,726 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:58,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:58,408 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2024-11-13 12:57:58,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-13 12:57:58,408 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 states have internal predecessors, (78), 0 states have call successors, (0), 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 51 [2024-11-13 12:57:58,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:58,409 INFO L225 Difference]: With dead ends: 87 [2024-11-13 12:57:58,409 INFO L226 Difference]: Without dead ends: 57 [2024-11-13 12:57:58,410 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2024-11-13 12:57:58,411 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:58,411 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 323 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 12:57:58,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-13 12:57:58,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2024-11-13 12:57:58,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:58,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2024-11-13 12:57:58,414 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 51 [2024-11-13 12:57:58,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:58,414 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2024-11-13 12:57:58,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:58,415 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2024-11-13 12:57:58,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-13 12:57:58,415 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:58,415 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:58,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 12:57:58,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-13 12:57:58,620 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:57:58,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:58,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1188899595, now seen corresponding path program 9 times [2024-11-13 12:57:58,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:57:58,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596788138] [2024-11-13 12:57:58,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:58,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:57:58,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:59,368 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 12 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:59,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:57:59,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596788138] [2024-11-13 12:57:59,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596788138] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:57:59,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618017356] [2024-11-13 12:57:59,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 12:57:59,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:59,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:57:59,371 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:57:59,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 12:57:59,513 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-13 12:57:59,514 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:57:59,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-13 12:57:59,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:57:59,527 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 [2024-11-13 12:57:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:59,966 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:58:00,760 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:00,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618017356] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:58:00,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:58:00,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 42 [2024-11-13 12:58:00,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733952927] [2024-11-13 12:58:00,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:58:00,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-13 12:58:00,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:58:00,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-13 12:58:00,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1553, Unknown=0, NotChecked=0, Total=1806 [2024-11-13 12:58:00,763 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 43 states, 42 states have (on average 3.7142857142857144) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:01,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:01,248 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2024-11-13 12:58:01,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 12:58:01,249 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 3.7142857142857144) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 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 54 [2024-11-13 12:58:01,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:01,250 INFO L225 Difference]: With dead ends: 66 [2024-11-13 12:58:01,250 INFO L226 Difference]: Without dead ends: 66 [2024-11-13 12:58:01,250 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=272, Invalid=1620, Unknown=0, NotChecked=0, Total=1892 [2024-11-13 12:58:01,252 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 23 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:01,253 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 333 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 12:58:01,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-13 12:58:01,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2024-11-13 12:58:01,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:01,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2024-11-13 12:58:01,258 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 54 [2024-11-13 12:58:01,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:01,259 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2024-11-13 12:58:01,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 3.7142857142857144) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:01,259 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2024-11-13 12:58:01,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-13 12:58:01,261 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:01,261 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:01,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 12:58:01,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-13 12:58:01,465 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:58:01,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:01,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1261444641, now seen corresponding path program 10 times [2024-11-13 12:58:01,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:58:01,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260802379] [2024-11-13 12:58:01,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:01,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:58:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 21 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:02,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:58:02,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260802379] [2024-11-13 12:58:02,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260802379] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:58:02,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289081098] [2024-11-13 12:58:02,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 12:58:02,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:02,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:02,489 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:02,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 12:58:02,671 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 12:58:02,671 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:58:02,677 INFO L255 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-13 12:58:02,681 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:02,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:58:03,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-13 12:58:03,101 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 21 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:03,101 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:58:03,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 12:58:03,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 12:58:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 21 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:03,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289081098] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:58:03,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:58:03,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 31 [2024-11-13 12:58:03,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80269082] [2024-11-13 12:58:03,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:58:03,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-13 12:58:03,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:58:03,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-13 12:58:03,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=847, Unknown=0, NotChecked=0, Total=930 [2024-11-13 12:58:03,321 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 31 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:04,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:04,025 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2024-11-13 12:58:04,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-13 12:58:04,026 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 31 states have internal predecessors, (90), 0 states have call successors, (0), 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 60 [2024-11-13 12:58:04,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:04,026 INFO L225 Difference]: With dead ends: 102 [2024-11-13 12:58:04,026 INFO L226 Difference]: Without dead ends: 66 [2024-11-13 12:58:04,027 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=121, Invalid=1285, Unknown=0, NotChecked=0, Total=1406 [2024-11-13 12:58:04,027 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:04,028 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 348 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 12:58:04,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-13 12:58:04,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2024-11-13 12:58:04,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:04,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2024-11-13 12:58:04,033 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 60 [2024-11-13 12:58:04,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:04,033 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2024-11-13 12:58:04,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 31 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:04,034 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2024-11-13 12:58:04,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-13 12:58:04,034 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:04,034 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:04,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-13 12:58:04,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-13 12:58:04,238 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:58:04,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:04,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1135011831, now seen corresponding path program 11 times [2024-11-13 12:58:04,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:58:04,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087681336] [2024-11-13 12:58:04,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:04,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:58:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:05,143 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:05,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:58:05,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087681336] [2024-11-13 12:58:05,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087681336] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:58:05,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481016784] [2024-11-13 12:58:05,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 12:58:05,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:05,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:05,147 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:05,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 12:58:05,319 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-13 12:58:05,319 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:58:05,322 INFO L255 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-13 12:58:05,326 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:05,332 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 [2024-11-13 12:58:05,816 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 35 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:05,816 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:58:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 35 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:06,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481016784] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:58:06,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:58:06,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 40 [2024-11-13 12:58:06,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098428789] [2024-11-13 12:58:06,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:58:06,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-13 12:58:06,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:58:06,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-13 12:58:06,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2024-11-13 12:58:06,635 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 41 states, 40 states have (on average 3.8) internal successors, (152), 41 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:07,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:07,044 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2024-11-13 12:58:07,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 12:58:07,045 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.8) internal successors, (152), 41 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2024-11-13 12:58:07,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:07,045 INFO L225 Difference]: With dead ends: 75 [2024-11-13 12:58:07,046 INFO L226 Difference]: Without dead ends: 75 [2024-11-13 12:58:07,046 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=267, Invalid=1455, Unknown=0, NotChecked=0, Total=1722 [2024-11-13 12:58:07,047 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:07,047 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 310 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 12:58:07,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-13 12:58:07,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2024-11-13 12:58:07,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 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) [2024-11-13 12:58:07,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2024-11-13 12:58:07,049 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 63 [2024-11-13 12:58:07,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:07,050 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2024-11-13 12:58:07,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.8) internal successors, (152), 41 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:07,050 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2024-11-13 12:58:07,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-13 12:58:07,050 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:07,051 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:07,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 12:58:07,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-13 12:58:07,255 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:58:07,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:07,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1659266979, now seen corresponding path program 12 times [2024-11-13 12:58:07,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:58:07,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074288046] [2024-11-13 12:58:07,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:07,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:58:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:08,242 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 25 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:08,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:58:08,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074288046] [2024-11-13 12:58:08,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074288046] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:58:08,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681635512] [2024-11-13 12:58:08,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 12:58:08,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:08,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:08,247 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:08,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 12:58:08,447 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-13 12:58:08,447 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:58:08,450 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-11-13 12:58:08,454 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:08,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:58:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 25 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:08,854 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:58:08,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 12:58:08,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 12:58:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 25 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:09,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681635512] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:58:09,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:58:09,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 34 [2024-11-13 12:58:09,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113816869] [2024-11-13 12:58:09,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:58:09,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-13 12:58:09,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:58:09,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-13 12:58:09,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1032, Unknown=0, NotChecked=0, Total=1122 [2024-11-13 12:58:09,038 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 34 states, 34 states have (on average 3.0) internal successors, (102), 34 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:09,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:09,942 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2024-11-13 12:58:09,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-13 12:58:09,943 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0) internal successors, (102), 34 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2024-11-13 12:58:09,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:09,944 INFO L225 Difference]: With dead ends: 117 [2024-11-13 12:58:09,944 INFO L226 Difference]: Without dead ends: 75 [2024-11-13 12:58:09,944 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=1589, Unknown=0, NotChecked=0, Total=1722 [2024-11-13 12:58:09,945 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:09,945 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 508 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 12:58:09,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-13 12:58:09,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2024-11-13 12:58:09,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:09,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2024-11-13 12:58:09,949 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 69 [2024-11-13 12:58:09,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:09,950 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2024-11-13 12:58:09,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.0) internal successors, (102), 34 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:09,950 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2024-11-13 12:58:09,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-13 12:58:09,951 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:09,951 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:09,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-13 12:58:10,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-13 12:58:10,152 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:58:10,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:10,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1852198541, now seen corresponding path program 13 times [2024-11-13 12:58:10,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:58:10,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880053715] [2024-11-13 12:58:10,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:10,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:58:10,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:11,189 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 35 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:11,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:58:11,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880053715] [2024-11-13 12:58:11,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880053715] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:58:11,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121639894] [2024-11-13 12:58:11,190 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 12:58:11,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:11,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:11,192 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:11,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 12:58:11,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:11,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-13 12:58:11,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 51 proven. 152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:11,788 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:58:12,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-13 12:58:12,481 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 51 proven. 152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:12,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121639894] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:58:12,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:58:12,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 39 [2024-11-13 12:58:12,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246555262] [2024-11-13 12:58:12,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:58:12,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-13 12:58:12,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:58:12,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-13 12:58:12,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1363, Unknown=0, NotChecked=0, Total=1560 [2024-11-13 12:58:12,484 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 40 states, 39 states have (on average 3.8205128205128207) internal successors, (149), 40 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:13,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:13,031 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2024-11-13 12:58:13,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-13 12:58:13,032 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.8205128205128207) internal successors, (149), 40 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2024-11-13 12:58:13,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:13,033 INFO L225 Difference]: With dead ends: 84 [2024-11-13 12:58:13,033 INFO L226 Difference]: Without dead ends: 84 [2024-11-13 12:58:13,033 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 114 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=214, Invalid=1426, Unknown=0, NotChecked=0, Total=1640 [2024-11-13 12:58:13,034 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 16 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:13,034 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 496 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 12:58:13,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-13 12:58:13,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2024-11-13 12:58:13,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:13,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2024-11-13 12:58:13,037 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 72 [2024-11-13 12:58:13,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:13,038 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2024-11-13 12:58:13,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.8205128205128207) internal successors, (149), 40 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:13,038 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2024-11-13 12:58:13,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-13 12:58:13,039 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:13,039 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:13,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 12:58:13,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-13 12:58:13,243 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:58:13,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:13,243 INFO L85 PathProgramCache]: Analyzing trace with hash 51903047, now seen corresponding path program 14 times [2024-11-13 12:58:13,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:58:13,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348659790] [2024-11-13 12:58:13,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:13,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:58:13,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 29 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:14,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:58:14,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348659790] [2024-11-13 12:58:14,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348659790] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:58:14,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386727094] [2024-11-13 12:58:14,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:58:14,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:14,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:14,409 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:14,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 12:58:14,597 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:58:14,597 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:58:14,600 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-11-13 12:58:14,604 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:14,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:58:14,995 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 29 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:14,995 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:58:15,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 12:58:15,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 12:58:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 29 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:15,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386727094] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:58:15,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:58:15,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 37 [2024-11-13 12:58:15,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458858252] [2024-11-13 12:58:15,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:58:15,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-13 12:58:15,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:58:15,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-13 12:58:15,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2024-11-13 12:58:15,202 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 37 states, 37 states have (on average 3.081081081081081) internal successors, (114), 37 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:16,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:16,099 INFO L93 Difference]: Finished difference Result 132 states and 133 transitions. [2024-11-13 12:58:16,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-13 12:58:16,100 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.081081081081081) internal successors, (114), 37 states have internal predecessors, (114), 0 states have call successors, (0), 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 78 [2024-11-13 12:58:16,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:16,100 INFO L225 Difference]: With dead ends: 132 [2024-11-13 12:58:16,101 INFO L226 Difference]: Without dead ends: 84 [2024-11-13 12:58:16,102 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=145, Invalid=1925, Unknown=0, NotChecked=0, Total=2070 [2024-11-13 12:58:16,102 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 1411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:16,102 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 651 Invalid, 1411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1404 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 12:58:16,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-13 12:58:16,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2024-11-13 12:58:16,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:16,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2024-11-13 12:58:16,106 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 78 [2024-11-13 12:58:16,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:16,106 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2024-11-13 12:58:16,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.081081081081081) internal successors, (114), 37 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:16,106 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2024-11-13 12:58:16,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-13 12:58:16,107 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:16,107 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:16,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-13 12:58:16,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-13 12:58:16,308 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:58:16,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:16,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1223932401, now seen corresponding path program 15 times [2024-11-13 12:58:16,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:58:16,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819238635] [2024-11-13 12:58:16,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:16,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:58:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 51 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:17,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:58:17,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819238635] [2024-11-13 12:58:17,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819238635] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:58:17,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643767942] [2024-11-13 12:58:17,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 12:58:17,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:17,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:17,589 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:17,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 12:58:17,831 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-13 12:58:17,831 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:58:17,835 INFO L255 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-13 12:58:17,840 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 70 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:18,494 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:58:19,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-13 12:58:19,352 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 70 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:19,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643767942] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:58:19,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:58:19,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 51 [2024-11-13 12:58:19,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554280394] [2024-11-13 12:58:19,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:58:19,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-13 12:58:19,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:58:19,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-13 12:58:19,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=2258, Unknown=0, NotChecked=0, Total=2652 [2024-11-13 12:58:19,354 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 52 states, 51 states have (on average 4.117647058823529) internal successors, (210), 52 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:19,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:19,813 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2024-11-13 12:58:19,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-13 12:58:19,814 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 4.117647058823529) internal successors, (210), 52 states have internal predecessors, (210), 0 states have call successors, (0), 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 81 [2024-11-13 12:58:19,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:19,815 INFO L225 Difference]: With dead ends: 93 [2024-11-13 12:58:19,815 INFO L226 Difference]: Without dead ends: 93 [2024-11-13 12:58:19,816 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 121 SyntacticMatches, 9 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=413, Invalid=2343, Unknown=0, NotChecked=0, Total=2756 [2024-11-13 12:58:19,816 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:19,816 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 433 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 12:58:19,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-13 12:58:19,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2024-11-13 12:58:19,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:19,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2024-11-13 12:58:19,819 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 81 [2024-11-13 12:58:19,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:19,820 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2024-11-13 12:58:19,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 4.117647058823529) internal successors, (210), 52 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:19,820 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2024-11-13 12:58:19,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-13 12:58:19,821 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:19,821 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:19,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 12:58:20,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-13 12:58:20,025 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:58:20,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:20,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1977799611, now seen corresponding path program 16 times [2024-11-13 12:58:20,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:58:20,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769281966] [2024-11-13 12:58:20,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:20,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:58:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 33 proven. 284 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:21,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:58:21,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769281966] [2024-11-13 12:58:21,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769281966] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:58:21,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439521041] [2024-11-13 12:58:21,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 12:58:21,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:21,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:21,309 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:21,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 12:58:21,500 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 12:58:21,500 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:58:21,503 INFO L255 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-13 12:58:21,508 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:21,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:58:21,987 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 33 proven. 284 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:21,987 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:58:22,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 12:58:22,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 12:58:22,203 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 33 proven. 284 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:22,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439521041] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:58:22,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:58:22,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 40 [2024-11-13 12:58:22,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059250408] [2024-11-13 12:58:22,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:58:22,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-13 12:58:22,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:58:22,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-13 12:58:22,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1456, Unknown=0, NotChecked=0, Total=1560 [2024-11-13 12:58:22,206 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 40 states, 40 states have (on average 3.15) internal successors, (126), 40 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:23,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:23,116 INFO L93 Difference]: Finished difference Result 147 states and 148 transitions. [2024-11-13 12:58:23,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-13 12:58:23,117 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.15) internal successors, (126), 40 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2024-11-13 12:58:23,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:23,117 INFO L225 Difference]: With dead ends: 147 [2024-11-13 12:58:23,117 INFO L226 Difference]: Without dead ends: 93 [2024-11-13 12:58:23,118 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=157, Invalid=2293, Unknown=0, NotChecked=0, Total=2450 [2024-11-13 12:58:23,119 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 16 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 1484 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:23,119 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 676 Invalid, 1492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1484 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 12:58:23,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-13 12:58:23,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2024-11-13 12:58:23,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:23,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2024-11-13 12:58:23,121 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 87 [2024-11-13 12:58:23,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:23,121 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2024-11-13 12:58:23,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.15) internal successors, (126), 40 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:23,124 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2024-11-13 12:58:23,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-13 12:58:23,126 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:23,126 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:23,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-13 12:58:23,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-13 12:58:23,327 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:58:23,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:23,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1362269221, now seen corresponding path program 17 times [2024-11-13 12:58:23,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:58:23,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264307111] [2024-11-13 12:58:23,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:23,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:58:23,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 70 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:24,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:58:24,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264307111] [2024-11-13 12:58:24,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264307111] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:58:24,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257859624] [2024-11-13 12:58:24,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 12:58:24,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:24,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:24,481 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:24,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 12:58:24,741 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-11-13 12:58:24,741 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:58:24,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-13 12:58:24,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:24,757 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 [2024-11-13 12:58:25,279 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 92 proven. 250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:25,279 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:58:26,428 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 92 proven. 250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:26,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257859624] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:58:26,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:58:26,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 55 [2024-11-13 12:58:26,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943797022] [2024-11-13 12:58:26,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:58:26,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-13 12:58:26,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:58:26,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-13 12:58:26,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=2634, Unknown=0, NotChecked=0, Total=3080 [2024-11-13 12:58:26,431 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 56 states, 55 states have (on average 3.909090909090909) internal successors, (215), 56 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:27,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:27,108 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2024-11-13 12:58:27,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-13 12:58:27,108 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 3.909090909090909) internal successors, (215), 56 states have internal predecessors, (215), 0 states have call successors, (0), 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 90 [2024-11-13 12:58:27,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:27,109 INFO L225 Difference]: With dead ends: 102 [2024-11-13 12:58:27,109 INFO L226 Difference]: Without dead ends: 102 [2024-11-13 12:58:27,110 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=477, Invalid=2715, Unknown=0, NotChecked=0, Total=3192 [2024-11-13 12:58:27,111 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 13 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:27,111 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 596 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1262 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 12:58:27,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-13 12:58:27,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2024-11-13 12:58:27,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:27,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2024-11-13 12:58:27,114 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 90 [2024-11-13 12:58:27,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:27,114 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2024-11-13 12:58:27,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 3.909090909090909) internal successors, (215), 56 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:27,115 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2024-11-13 12:58:27,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-13 12:58:27,115 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:27,116 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:27,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-13 12:58:27,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:27,316 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:58:27,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:27,317 INFO L85 PathProgramCache]: Analyzing trace with hash -224377169, now seen corresponding path program 18 times [2024-11-13 12:58:27,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:58:27,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357095871] [2024-11-13 12:58:27,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:27,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:58:27,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 37 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:28,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:58:28,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357095871] [2024-11-13 12:58:28,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357095871] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:58:28,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311511652] [2024-11-13 12:58:28,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 12:58:28,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:28,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:28,677 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:28,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-13 12:58:29,019 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-13 12:58:29,020 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:58:29,024 INFO L255 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 111 conjuncts are in the unsatisfiable core [2024-11-13 12:58:29,029 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:29,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:58:29,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-13 12:58:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 37 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:29,647 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:58:29,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 12:58:29,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 12:58:29,944 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 37 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:29,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311511652] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:58:29,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:58:29,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 43 [2024-11-13 12:58:29,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656417536] [2024-11-13 12:58:29,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:58:29,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-13 12:58:29,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:58:29,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-13 12:58:29,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1695, Unknown=0, NotChecked=0, Total=1806 [2024-11-13 12:58:29,946 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 43 states, 43 states have (on average 3.2093023255813953) internal successors, (138), 43 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:31,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:31,112 INFO L93 Difference]: Finished difference Result 162 states and 163 transitions. [2024-11-13 12:58:31,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-13 12:58:31,113 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.2093023255813953) internal successors, (138), 43 states have internal predecessors, (138), 0 states have call successors, (0), 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 [2024-11-13 12:58:31,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:31,114 INFO L225 Difference]: With dead ends: 162 [2024-11-13 12:58:31,114 INFO L226 Difference]: Without dead ends: 102 [2024-11-13 12:58:31,115 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=169, Invalid=2693, Unknown=0, NotChecked=0, Total=2862 [2024-11-13 12:58:31,115 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 17 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 2056 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 2065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:31,116 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 989 Invalid, 2065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2056 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-13 12:58:31,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-13 12:58:31,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2024-11-13 12:58:31,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:31,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2024-11-13 12:58:31,119 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 96 [2024-11-13 12:58:31,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:31,120 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2024-11-13 12:58:31,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.2093023255813953) internal successors, (138), 43 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:31,120 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2024-11-13 12:58:31,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-13 12:58:31,121 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:31,121 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:31,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-13 12:58:31,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:31,322 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:58:31,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:31,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1238314969, now seen corresponding path program 19 times [2024-11-13 12:58:31,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:58:31,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822625412] [2024-11-13 12:58:31,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:31,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:58:31,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:32,811 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 92 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:32,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:58:32,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822625412] [2024-11-13 12:58:32,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822625412] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:58:32,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636218775] [2024-11-13 12:58:32,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 12:58:32,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:32,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:32,814 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:32,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-13 12:58:33,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:33,015 INFO L255 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 102 conjuncts are in the unsatisfiable core [2024-11-13 12:58:33,020 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:33,735 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 117 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:33,735 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:58:34,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-13 12:58:34,646 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 117 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:34,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636218775] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:58:34,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:58:34,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 51 [2024-11-13 12:58:34,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451979700] [2024-11-13 12:58:34,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:58:34,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-13 12:58:34,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:58:34,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-13 12:58:34,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=2326, Unknown=0, NotChecked=0, Total=2652 [2024-11-13 12:58:34,648 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 52 states, 51 states have (on average 3.980392156862745) internal successors, (203), 52 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:35,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:35,361 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2024-11-13 12:58:35,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-13 12:58:35,362 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 3.980392156862745) internal successors, (203), 52 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2024-11-13 12:58:35,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:35,363 INFO L225 Difference]: With dead ends: 111 [2024-11-13 12:58:35,363 INFO L226 Difference]: Without dead ends: 111 [2024-11-13 12:58:35,363 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 159 SyntacticMatches, 11 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=349, Invalid=2407, Unknown=0, NotChecked=0, Total=2756 [2024-11-13 12:58:35,364 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 13 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 1454 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:35,364 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 721 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1454 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 12:58:35,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-13 12:58:35,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2024-11-13 12:58:35,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:35,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2024-11-13 12:58:35,368 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 99 [2024-11-13 12:58:35,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:35,369 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2024-11-13 12:58:35,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 3.980392156862745) internal successors, (203), 52 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:35,369 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2024-11-13 12:58:35,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-11-13 12:58:35,369 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:35,369 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:35,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-13 12:58:35,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:35,570 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:58:35,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:35,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1685230637, now seen corresponding path program 20 times [2024-11-13 12:58:35,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:58:35,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343677234] [2024-11-13 12:58:35,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:35,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:58:35,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 41 proven. 445 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:37,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:58:37,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343677234] [2024-11-13 12:58:37,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343677234] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:58:37,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187449127] [2024-11-13 12:58:37,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:58:37,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:37,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:37,162 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:37,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-13 12:58:37,367 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:58:37,367 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:58:37,370 INFO L255 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 119 conjuncts are in the unsatisfiable core [2024-11-13 12:58:37,375 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:37,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:58:37,990 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 41 proven. 445 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:37,990 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:58:38,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 12:58:38,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 12:58:38,227 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 41 proven. 445 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:38,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187449127] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:58:38,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:58:38,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 46 [2024-11-13 12:58:38,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091740117] [2024-11-13 12:58:38,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:58:38,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-13 12:58:38,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:58:38,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-13 12:58:38,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1952, Unknown=0, NotChecked=0, Total=2070 [2024-11-13 12:58:38,230 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 46 states, 46 states have (on average 3.260869565217391) internal successors, (150), 46 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:39,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:39,737 INFO L93 Difference]: Finished difference Result 177 states and 178 transitions. [2024-11-13 12:58:39,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-13 12:58:39,738 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.260869565217391) internal successors, (150), 46 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2024-11-13 12:58:39,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:39,739 INFO L225 Difference]: With dead ends: 177 [2024-11-13 12:58:39,739 INFO L226 Difference]: Without dead ends: 111 [2024-11-13 12:58:39,740 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=181, Invalid=3125, Unknown=0, NotChecked=0, Total=3306 [2024-11-13 12:58:39,740 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 18 mSDsluCounter, 1213 mSDsCounter, 0 mSdLazyCounter, 2593 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1249 SdHoareTripleChecker+Invalid, 2603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:39,740 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1249 Invalid, 2603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2593 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-13 12:58:39,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-13 12:58:39,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2024-11-13 12:58:39,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:39,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2024-11-13 12:58:39,744 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 105 [2024-11-13 12:58:39,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:39,744 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2024-11-13 12:58:39,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.260869565217391) internal successors, (150), 46 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:39,744 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2024-11-13 12:58:39,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-13 12:58:39,745 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:39,745 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:39,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-13 12:58:39,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:39,946 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:58:39,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:39,946 INFO L85 PathProgramCache]: Analyzing trace with hash 755391043, now seen corresponding path program 21 times [2024-11-13 12:58:39,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:58:39,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415774647] [2024-11-13 12:58:39,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:39,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:58:39,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:41,172 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 117 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:41,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:58:41,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415774647] [2024-11-13 12:58:41,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415774647] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:58:41,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957705841] [2024-11-13 12:58:41,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 12:58:41,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:41,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:41,174 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:41,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-13 12:58:41,510 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-13 12:58:41,510 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:58:41,514 INFO L255 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-11-13 12:58:41,518 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 145 proven. 372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:42,394 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:58:43,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-13 12:58:43,643 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 145 proven. 372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:43,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957705841] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:58:43,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:58:43,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 66 [2024-11-13 12:58:43,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644731690] [2024-11-13 12:58:43,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:58:43,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-13 12:58:43,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:58:43,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-13 12:58:43,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=661, Invalid=3761, Unknown=0, NotChecked=0, Total=4422 [2024-11-13 12:58:43,648 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 67 states, 66 states have (on average 4.2727272727272725) internal successors, (282), 67 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:44,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:44,287 INFO L93 Difference]: Finished difference Result 120 states and 121 transitions. [2024-11-13 12:58:44,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-13 12:58:44,288 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 4.2727272727272725) internal successors, (282), 67 states have internal predecessors, (282), 0 states have call successors, (0), 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 108 [2024-11-13 12:58:44,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:44,288 INFO L225 Difference]: With dead ends: 120 [2024-11-13 12:58:44,288 INFO L226 Difference]: Without dead ends: 120 [2024-11-13 12:58:44,289 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 163 SyntacticMatches, 12 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2170 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=686, Invalid=3870, Unknown=0, NotChecked=0, Total=4556 [2024-11-13 12:58:44,289 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 16 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:44,290 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 714 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1192 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 12:58:44,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-13 12:58:44,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 115. [2024-11-13 12:58:44,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:44,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2024-11-13 12:58:44,299 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 108 [2024-11-13 12:58:44,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:44,299 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2024-11-13 12:58:44,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 4.2727272727272725) internal successors, (282), 67 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:44,300 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2024-11-13 12:58:44,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-13 12:58:44,300 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:44,300 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:44,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-13 12:58:44,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:44,501 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:58:44,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:44,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1870055191, now seen corresponding path program 22 times [2024-11-13 12:58:44,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:58:44,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833988459] [2024-11-13 12:58:44,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:44,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:58:44,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:45,892 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 45 proven. 539 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:45,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:58:45,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833988459] [2024-11-13 12:58:45,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833988459] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:58:45,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955282047] [2024-11-13 12:58:45,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 12:58:45,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:45,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:45,894 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:45,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-13 12:58:46,142 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 12:58:46,142 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:58:46,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 127 conjuncts are in the unsatisfiable core [2024-11-13 12:58:46,151 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:46,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:58:46,786 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 45 proven. 539 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:46,786 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:58:46,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 12:58:46,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 12:58:47,021 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 45 proven. 539 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:47,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955282047] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:58:47,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:58:47,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 49 [2024-11-13 12:58:47,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252296452] [2024-11-13 12:58:47,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:58:47,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-13 12:58:47,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:58:47,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-13 12:58:47,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2227, Unknown=0, NotChecked=0, Total=2352 [2024-11-13 12:58:47,023 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 49 states, 49 states have (on average 3.306122448979592) internal successors, (162), 49 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:48,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:48,558 INFO L93 Difference]: Finished difference Result 192 states and 193 transitions. [2024-11-13 12:58:48,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-13 12:58:48,558 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.306122448979592) internal successors, (162), 49 states have internal predecessors, (162), 0 states have call successors, (0), 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 114 [2024-11-13 12:58:48,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:48,559 INFO L225 Difference]: With dead ends: 192 [2024-11-13 12:58:48,559 INFO L226 Difference]: Without dead ends: 120 [2024-11-13 12:58:48,559 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=193, Invalid=3589, Unknown=0, NotChecked=0, Total=3782 [2024-11-13 12:58:48,560 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 21 mSDsluCounter, 1217 mSDsCounter, 0 mSdLazyCounter, 2676 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 2687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:48,560 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1256 Invalid, 2687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2676 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-13 12:58:48,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-13 12:58:48,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2024-11-13 12:58:48,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:48,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2024-11-13 12:58:48,563 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 114 [2024-11-13 12:58:48,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:48,563 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2024-11-13 12:58:48,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.306122448979592) internal successors, (162), 49 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:48,563 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2024-11-13 12:58:48,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-13 12:58:48,564 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:48,564 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:48,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-13 12:58:48,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:48,765 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:58:48,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:48,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1745975745, now seen corresponding path program 23 times [2024-11-13 12:58:48,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:58:48,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961351071] [2024-11-13 12:58:48,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:48,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:58:48,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:49,903 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 145 proven. 473 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:49,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:58:49,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961351071] [2024-11-13 12:58:49,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961351071] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:58:49,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890002995] [2024-11-13 12:58:49,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 12:58:49,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:49,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:49,906 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:49,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-13 12:58:50,348 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-11-13 12:58:50,348 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:58:50,353 INFO L255 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 124 conjuncts are in the unsatisfiable core [2024-11-13 12:58:50,360 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:50,367 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 [2024-11-13 12:58:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 176 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:51,250 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:58:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 176 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:53,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890002995] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:58:53,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:58:53,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 70 [2024-11-13 12:58:53,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212554424] [2024-11-13 12:58:53,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:58:53,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-13 12:58:53,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:58:53,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-13 12:58:53,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=710, Invalid=4260, Unknown=0, NotChecked=0, Total=4970 [2024-11-13 12:58:53,171 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 71 states, 70 states have (on average 3.9714285714285715) internal successors, (278), 71 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:54,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:54,154 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2024-11-13 12:58:54,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-13 12:58:54,154 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 3.9714285714285715) internal successors, (278), 71 states have internal predecessors, (278), 0 states have call successors, (0), 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 117 [2024-11-13 12:58:54,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:54,155 INFO L225 Difference]: With dead ends: 129 [2024-11-13 12:58:54,155 INFO L226 Difference]: Without dead ends: 129 [2024-11-13 12:58:54,155 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1772 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=750, Invalid=4362, Unknown=0, NotChecked=0, Total=5112 [2024-11-13 12:58:54,156 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 16 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 1901 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 1902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:54,156 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 972 Invalid, 1902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1901 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-13 12:58:54,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-13 12:58:54,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2024-11-13 12:58:54,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:54,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2024-11-13 12:58:54,160 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 117 [2024-11-13 12:58:54,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:54,161 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2024-11-13 12:58:54,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 3.9714285714285715) internal successors, (278), 71 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:54,161 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2024-11-13 12:58:54,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-13 12:58:54,162 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:54,162 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:54,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-13 12:58:54,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:54,363 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:58:54,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:54,363 INFO L85 PathProgramCache]: Analyzing trace with hash -524300267, now seen corresponding path program 24 times [2024-11-13 12:58:54,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:58:54,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869937323] [2024-11-13 12:58:54,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:54,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:58:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 49 proven. 642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:56,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:58:56,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869937323] [2024-11-13 12:58:56,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869937323] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:58:56,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388859213] [2024-11-13 12:58:56,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 12:58:56,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:56,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:56,312 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:56,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-13 12:58:56,815 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-11-13 12:58:56,815 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:58:56,820 INFO L255 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 139 conjuncts are in the unsatisfiable core [2024-11-13 12:58:56,827 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:57,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:58:57,603 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 49 proven. 642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:57,603 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:58:57,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 12:58:57,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 12:58:57,868 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 49 proven. 642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:57,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388859213] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:58:57,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:58:57,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 52 [2024-11-13 12:58:57,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225520179] [2024-11-13 12:58:57,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:58:57,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-13 12:58:57,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:58:57,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-13 12:58:57,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2520, Unknown=0, NotChecked=0, Total=2652 [2024-11-13 12:58:57,870 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 52 states, 52 states have (on average 3.3461538461538463) internal successors, (174), 52 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:59,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:58:59,798 INFO L93 Difference]: Finished difference Result 207 states and 208 transitions. [2024-11-13 12:58:59,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-13 12:58:59,798 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.3461538461538463) internal successors, (174), 52 states have internal predecessors, (174), 0 states have call successors, (0), 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 123 [2024-11-13 12:58:59,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:58:59,799 INFO L225 Difference]: With dead ends: 207 [2024-11-13 12:58:59,799 INFO L226 Difference]: Without dead ends: 129 [2024-11-13 12:58:59,800 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=205, Invalid=4085, Unknown=0, NotChecked=0, Total=4290 [2024-11-13 12:58:59,800 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 18 mSDsluCounter, 1587 mSDsCounter, 0 mSdLazyCounter, 3380 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1629 SdHoareTripleChecker+Invalid, 3392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 3380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-13 12:58:59,800 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1629 Invalid, 3392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 3380 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-13 12:58:59,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-13 12:58:59,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2024-11-13 12:58:59,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:59,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2024-11-13 12:58:59,808 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 123 [2024-11-13 12:58:59,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:58:59,808 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2024-11-13 12:58:59,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.3461538461538463) internal successors, (174), 52 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:59,808 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2024-11-13 12:58:59,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-11-13 12:58:59,809 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:58:59,809 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:59,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-13 12:59:00,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-13 12:59:00,010 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:59:00,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:59:00,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1053981867, now seen corresponding path program 25 times [2024-11-13 12:59:00,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:59:00,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287071044] [2024-11-13 12:59:00,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:59:00,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:59:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:01,722 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 176 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:01,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:59:01,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287071044] [2024-11-13 12:59:01,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287071044] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:59:01,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137976755] [2024-11-13 12:59:01,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 12:59:01,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:01,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:59:01,726 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:59:01,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-13 12:59:02,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:02,022 INFO L255 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 129 conjuncts are in the unsatisfiable core [2024-11-13 12:59:02,029 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:59:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 210 proven. 518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:02,904 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:59:03,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-13 12:59:04,292 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 210 proven. 518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:04,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137976755] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:59:04,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:59:04,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 63 [2024-11-13 12:59:04,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147212578] [2024-11-13 12:59:04,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:59:04,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-13 12:59:04,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:59:04,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-13 12:59:04,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=3541, Unknown=0, NotChecked=0, Total=4032 [2024-11-13 12:59:04,295 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 64 states, 63 states have (on average 4.079365079365079) internal successors, (257), 64 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:05,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:59:05,203 INFO L93 Difference]: Finished difference Result 138 states and 139 transitions. [2024-11-13 12:59:05,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-13 12:59:05,204 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 4.079365079365079) internal successors, (257), 64 states have internal predecessors, (257), 0 states have call successors, (0), 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 126 [2024-11-13 12:59:05,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:59:05,205 INFO L225 Difference]: With dead ends: 138 [2024-11-13 12:59:05,205 INFO L226 Difference]: Without dead ends: 138 [2024-11-13 12:59:05,205 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 204 SyntacticMatches, 14 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2063 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=520, Invalid=3640, Unknown=0, NotChecked=0, Total=4160 [2024-11-13 12:59:05,205 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 16 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 1888 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 1889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 12:59:05,206 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 952 Invalid, 1889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1888 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 12:59:05,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-13 12:59:05,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 133. [2024-11-13 12:59:05,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:05,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2024-11-13 12:59:05,209 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 126 [2024-11-13 12:59:05,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:59:05,210 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2024-11-13 12:59:05,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 4.079365079365079) internal successors, (257), 64 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:05,210 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2024-11-13 12:59:05,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-11-13 12:59:05,211 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:59:05,211 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:59:05,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-13 12:59:05,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:05,412 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:59:05,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:59:05,412 INFO L85 PathProgramCache]: Analyzing trace with hash 162102143, now seen corresponding path program 26 times [2024-11-13 12:59:05,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:59:05,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309638656] [2024-11-13 12:59:05,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:59:05,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:59:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:07,586 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 53 proven. 754 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:07,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:59:07,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309638656] [2024-11-13 12:59:07,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309638656] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:59:07,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434820861] [2024-11-13 12:59:07,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:59:07,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:07,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:59:07,589 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:59:07,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-13 12:59:07,897 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:59:07,897 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:59:07,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 149 conjuncts are in the unsatisfiable core [2024-11-13 12:59:07,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:59:08,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:59:08,807 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 53 proven. 754 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:08,808 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:59:08,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 12:59:08,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 12:59:09,096 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 53 proven. 754 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:09,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434820861] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:59:09,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:59:09,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 55 [2024-11-13 12:59:09,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680212275] [2024-11-13 12:59:09,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:59:09,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-13 12:59:09,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:59:09,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-13 12:59:09,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2831, Unknown=0, NotChecked=0, Total=2970 [2024-11-13 12:59:09,098 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 55 states, 55 states have (on average 3.381818181818182) internal successors, (186), 55 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:11,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:59:11,474 INFO L93 Difference]: Finished difference Result 222 states and 223 transitions. [2024-11-13 12:59:11,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-13 12:59:11,474 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.381818181818182) internal successors, (186), 55 states have internal predecessors, (186), 0 states have call successors, (0), 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 132 [2024-11-13 12:59:11,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:59:11,475 INFO L225 Difference]: With dead ends: 222 [2024-11-13 12:59:11,475 INFO L226 Difference]: Without dead ends: 138 [2024-11-13 12:59:11,476 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=217, Invalid=4613, Unknown=0, NotChecked=0, Total=4830 [2024-11-13 12:59:11,477 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 19 mSDsluCounter, 1711 mSDsCounter, 0 mSdLazyCounter, 3676 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1756 SdHoareTripleChecker+Invalid, 3689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 3676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-13 12:59:11,477 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 1756 Invalid, 3689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 3676 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-13 12:59:11,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-13 12:59:11,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2024-11-13 12:59:11,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:11,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2024-11-13 12:59:11,483 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 132 [2024-11-13 12:59:11,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:59:11,484 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2024-11-13 12:59:11,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.381818181818182) internal successors, (186), 55 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:11,484 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2024-11-13 12:59:11,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-11-13 12:59:11,485 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:59:11,485 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:59:11,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-13 12:59:11,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-13 12:59:11,686 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:59:11,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:59:11,686 INFO L85 PathProgramCache]: Analyzing trace with hash -622815319, now seen corresponding path program 27 times [2024-11-13 12:59:11,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:59:11,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185796957] [2024-11-13 12:59:11,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:59:11,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:59:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:13,550 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 210 proven. 637 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:13,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:59:13,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185796957] [2024-11-13 12:59:13,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185796957] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:59:13,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091464923] [2024-11-13 12:59:13,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 12:59:13,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:13,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:59:13,553 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:59:13,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-13 12:59:14,050 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-13 12:59:14,050 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:59:14,054 INFO L255 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 112 conjuncts are in the unsatisfiable core [2024-11-13 12:59:14,062 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:59:15,586 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 247 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:15,586 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:59:17,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-13 12:59:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 247 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:17,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091464923] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:59:17,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:59:17,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 81 [2024-11-13 12:59:17,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122487467] [2024-11-13 12:59:17,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:59:17,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-11-13 12:59:17,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:59:17,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-11-13 12:59:17,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1000, Invalid=5642, Unknown=0, NotChecked=0, Total=6642 [2024-11-13 12:59:17,576 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 82 states, 81 states have (on average 4.37037037037037) internal successors, (354), 82 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:18,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:59:18,419 INFO L93 Difference]: Finished difference Result 147 states and 148 transitions. [2024-11-13 12:59:18,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-13 12:59:18,419 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 4.37037037037037) internal successors, (354), 82 states have internal predecessors, (354), 0 states have call successors, (0), 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 135 [2024-11-13 12:59:18,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:59:18,420 INFO L225 Difference]: With dead ends: 147 [2024-11-13 12:59:18,420 INFO L226 Difference]: Without dead ends: 147 [2024-11-13 12:59:18,420 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 205 SyntacticMatches, 15 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3373 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1031, Invalid=5775, Unknown=0, NotChecked=0, Total=6806 [2024-11-13 12:59:18,421 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 13 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 1639 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 1640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 12:59:18,421 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 767 Invalid, 1640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1639 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 12:59:18,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-13 12:59:18,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2024-11-13 12:59:18,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 141 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:18,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2024-11-13 12:59:18,424 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 135 [2024-11-13 12:59:18,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:59:18,425 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2024-11-13 12:59:18,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 4.37037037037037) internal successors, (354), 82 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:18,425 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2024-11-13 12:59:18,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2024-11-13 12:59:18,426 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:59:18,426 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:59:18,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-13 12:59:18,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-13 12:59:18,627 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:59:18,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:59:18,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1045766147, now seen corresponding path program 28 times [2024-11-13 12:59:18,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:59:18,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031575866] [2024-11-13 12:59:18,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:59:18,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:59:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:20,737 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 57 proven. 875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:20,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:59:20,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031575866] [2024-11-13 12:59:20,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031575866] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:59:20,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263403005] [2024-11-13 12:59:20,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 12:59:20,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:20,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:59:20,739 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:59:20,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-13 12:59:21,226 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 12:59:21,227 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:59:21,232 INFO L255 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 157 conjuncts are in the unsatisfiable core [2024-11-13 12:59:21,240 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:59:22,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:59:22,380 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 57 proven. 875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:22,380 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:59:22,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 12:59:22,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 12:59:22,716 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 57 proven. 875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:22,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263403005] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:59:22,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:59:22,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 58 [2024-11-13 12:59:22,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267259089] [2024-11-13 12:59:22,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:59:22,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-13 12:59:22,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:59:22,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-13 12:59:22,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=3160, Unknown=0, NotChecked=0, Total=3306 [2024-11-13 12:59:22,718 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand has 58 states, 58 states have (on average 3.413793103448276) internal successors, (198), 58 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:25,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:59:25,336 INFO L93 Difference]: Finished difference Result 237 states and 238 transitions. [2024-11-13 12:59:25,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-13 12:59:25,337 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.413793103448276) internal successors, (198), 58 states have internal predecessors, (198), 0 states have call successors, (0), 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 141 [2024-11-13 12:59:25,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:59:25,338 INFO L225 Difference]: With dead ends: 237 [2024-11-13 12:59:25,338 INFO L226 Difference]: Without dead ends: 147 [2024-11-13 12:59:25,338 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=229, Invalid=5173, Unknown=0, NotChecked=0, Total=5402 [2024-11-13 12:59:25,339 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 22 mSDsluCounter, 1875 mSDsCounter, 0 mSdLazyCounter, 3979 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1923 SdHoareTripleChecker+Invalid, 3993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 3979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-13 12:59:25,339 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 1923 Invalid, 3993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 3979 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-13 12:59:25,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-13 12:59:25,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2024-11-13 12:59:25,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:25,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2024-11-13 12:59:25,344 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 141 [2024-11-13 12:59:25,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:59:25,344 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2024-11-13 12:59:25,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.413793103448276) internal successors, (198), 58 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:25,345 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2024-11-13 12:59:25,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-13 12:59:25,346 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:59:25,346 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:59:25,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-13 12:59:25,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:25,546 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:59:25,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:59:25,547 INFO L85 PathProgramCache]: Analyzing trace with hash 2059391763, now seen corresponding path program 29 times [2024-11-13 12:59:25,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:59:25,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538234396] [2024-11-13 12:59:25,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:59:25,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:59:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:27,258 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 247 proven. 728 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:27,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:59:27,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538234396] [2024-11-13 12:59:27,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538234396] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:59:27,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886190700] [2024-11-13 12:59:27,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 12:59:27,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:27,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:59:27,262 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:59:27,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-13 12:59:27,799 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2024-11-13 12:59:27,799 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:59:27,805 INFO L255 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 151 conjuncts are in the unsatisfiable core [2024-11-13 12:59:27,813 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:59:27,817 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 [2024-11-13 12:59:28,931 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 287 proven. 688 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:28,931 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:59:31,490 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 287 proven. 688 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:31,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886190700] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:59:31,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:59:31,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 85 [2024-11-13 12:59:31,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984777417] [2024-11-13 12:59:31,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:59:31,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-11-13 12:59:31,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:59:31,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-11-13 12:59:31,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=6273, Unknown=0, NotChecked=0, Total=7310 [2024-11-13 12:59:31,492 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 86 states, 85 states have (on average 4.011764705882353) internal successors, (341), 86 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:32,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:59:32,771 INFO L93 Difference]: Finished difference Result 156 states and 157 transitions. [2024-11-13 12:59:32,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-13 12:59:32,771 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 4.011764705882353) internal successors, (341), 86 states have internal predecessors, (341), 0 states have call successors, (0), 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 144 [2024-11-13 12:59:32,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:59:32,772 INFO L225 Difference]: With dead ends: 156 [2024-11-13 12:59:32,772 INFO L226 Difference]: Without dead ends: 156 [2024-11-13 12:59:32,772 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2714 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1086, Invalid=6396, Unknown=0, NotChecked=0, Total=7482 [2024-11-13 12:59:32,773 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 16 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 2385 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 2386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:59:32,773 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1234 Invalid, 2386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2385 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-13 12:59:32,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-11-13 12:59:32,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 151. [2024-11-13 12:59:32,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0133333333333334) internal successors, (152), 150 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:32,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2024-11-13 12:59:32,777 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 144 [2024-11-13 12:59:32,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:59:32,777 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2024-11-13 12:59:32,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 4.011764705882353) internal successors, (341), 86 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:32,777 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2024-11-13 12:59:32,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-11-13 12:59:32,778 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:59:32,778 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:59:32,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-13 12:59:32,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:32,979 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:59:32,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:59:32,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1253678105, now seen corresponding path program 30 times [2024-11-13 12:59:32,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:59:32,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873255846] [2024-11-13 12:59:32,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:59:32,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:59:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:35,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1066 backedges. 61 proven. 1005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:35,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:59:35,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873255846] [2024-11-13 12:59:35,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873255846] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:59:35,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125802347] [2024-11-13 12:59:35,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 12:59:35,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:35,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:59:35,024 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:59:35,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-13 12:59:35,609 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2024-11-13 12:59:35,610 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:59:35,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 173 conjuncts are in the unsatisfiable core [2024-11-13 12:59:35,624 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:59:36,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:59:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1066 backedges. 61 proven. 1005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:36,846 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:59:36,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 12:59:37,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 12:59:37,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1066 backedges. 61 proven. 1005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:37,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125802347] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:59:37,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:59:37,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 63 [2024-11-13 12:59:37,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213828568] [2024-11-13 12:59:37,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:59:37,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-13 12:59:37,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:59:37,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-13 12:59:37,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=3745, Unknown=0, NotChecked=0, Total=3906 [2024-11-13 12:59:37,177 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand has 63 states, 63 states have (on average 3.380952380952381) internal successors, (213), 63 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:39,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:59:39,727 INFO L93 Difference]: Finished difference Result 252 states and 253 transitions. [2024-11-13 12:59:39,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-13 12:59:39,727 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.380952380952381) internal successors, (213), 63 states have internal predecessors, (213), 0 states have call successors, (0), 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 150 [2024-11-13 12:59:39,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:59:39,731 INFO L225 Difference]: With dead ends: 252 [2024-11-13 12:59:39,731 INFO L226 Difference]: Without dead ends: 156 [2024-11-13 12:59:39,732 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=241, Invalid=5765, Unknown=0, NotChecked=0, Total=6006 [2024-11-13 12:59:39,732 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 19 mSDsluCounter, 2002 mSDsCounter, 0 mSdLazyCounter, 4299 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 2053 SdHoareTripleChecker+Invalid, 4314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 4299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-13 12:59:39,732 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 2053 Invalid, 4314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 4299 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-13 12:59:39,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-11-13 12:59:39,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2024-11-13 12:59:39,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0130718954248366) internal successors, (155), 153 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:39,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2024-11-13 12:59:39,747 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 150 [2024-11-13 12:59:39,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:59:39,747 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2024-11-13 12:59:39,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.380952380952381) internal successors, (213), 63 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:39,747 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2024-11-13 12:59:39,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-11-13 12:59:39,748 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:59:39,748 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:59:39,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-13 12:59:39,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:39,949 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:59:39,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:59:39,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1486714479, now seen corresponding path program 31 times [2024-11-13 12:59:39,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:59:39,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752252711] [2024-11-13 12:59:39,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:59:39,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:59:39,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:41,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 287 proven. 825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:41,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:59:41,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752252711] [2024-11-13 12:59:41,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752252711] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:59:41,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357504170] [2024-11-13 12:59:41,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 12:59:41,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:41,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:59:41,946 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:59:41,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-13 12:59:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:42,343 INFO L255 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 156 conjuncts are in the unsatisfiable core [2024-11-13 12:59:42,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:59:43,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 330 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:43,526 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:59:44,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-13 12:59:45,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 330 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:45,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357504170] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:59:45,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:59:45,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 37] total 75 [2024-11-13 12:59:45,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491804723] [2024-11-13 12:59:45,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:59:45,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-13 12:59:45,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:59:45,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-13 12:59:45,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=692, Invalid=5008, Unknown=0, NotChecked=0, Total=5700 [2024-11-13 12:59:45,237 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand has 76 states, 75 states have (on average 4.1466666666666665) internal successors, (311), 76 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:46,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:59:46,824 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2024-11-13 12:59:46,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-13 12:59:46,825 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 4.1466666666666665) internal successors, (311), 76 states have internal predecessors, (311), 0 states have call successors, (0), 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 153 [2024-11-13 12:59:46,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:59:46,826 INFO L225 Difference]: With dead ends: 165 [2024-11-13 12:59:46,826 INFO L226 Difference]: Without dead ends: 165 [2024-11-13 12:59:46,826 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 249 SyntacticMatches, 17 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3020 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=727, Invalid=5125, Unknown=0, NotChecked=0, Total=5852 [2024-11-13 12:59:46,827 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 13 mSDsluCounter, 1478 mSDsCounter, 0 mSdLazyCounter, 2966 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1535 SdHoareTripleChecker+Invalid, 2967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-13 12:59:46,827 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1535 Invalid, 2967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2966 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-13 12:59:46,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-11-13 12:59:46,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 160. [2024-11-13 12:59:46,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0125786163522013) internal successors, (161), 159 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:46,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2024-11-13 12:59:46,832 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 153 [2024-11-13 12:59:46,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:59:46,832 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2024-11-13 12:59:46,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 4.1466666666666665) internal successors, (311), 76 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:46,832 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2024-11-13 12:59:46,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-13 12:59:46,833 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:59:46,833 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:59:46,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-13 12:59:47,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-13 12:59:47,034 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:59:47,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:59:47,034 INFO L85 PathProgramCache]: Analyzing trace with hash 400147429, now seen corresponding path program 32 times [2024-11-13 12:59:47,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:59:47,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651202627] [2024-11-13 12:59:47,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:59:47,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:59:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:49,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 65 proven. 1144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:49,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:59:49,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651202627] [2024-11-13 12:59:49,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651202627] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:59:49,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280126869] [2024-11-13 12:59:49,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:59:49,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:49,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:59:49,697 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:59:49,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-13 12:59:50,022 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:59:50,022 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:59:50,026 INFO L255 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 179 conjuncts are in the unsatisfiable core [2024-11-13 12:59:50,032 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:59:50,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:59:51,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 65 proven. 1144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:51,261 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:59:51,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 12:59:51,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 12:59:51,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 65 proven. 1144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:51,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280126869] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:59:51,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:59:51,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 64 [2024-11-13 12:59:51,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634198879] [2024-11-13 12:59:51,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:59:51,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-13 12:59:51,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:59:51,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-13 12:59:51,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=3872, Unknown=0, NotChecked=0, Total=4032 [2024-11-13 12:59:51,614 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand has 64 states, 64 states have (on average 3.46875) internal successors, (222), 64 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:54,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:59:54,554 INFO L93 Difference]: Finished difference Result 267 states and 268 transitions. [2024-11-13 12:59:54,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-13 12:59:54,555 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.46875) internal successors, (222), 64 states have internal predecessors, (222), 0 states have call successors, (0), 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 159 [2024-11-13 12:59:54,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:59:54,556 INFO L225 Difference]: With dead ends: 267 [2024-11-13 12:59:54,556 INFO L226 Difference]: Without dead ends: 165 [2024-11-13 12:59:54,556 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=253, Invalid=6389, Unknown=0, NotChecked=0, Total=6642 [2024-11-13 12:59:54,556 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 24 mSDsluCounter, 2382 mSDsCounter, 0 mSdLazyCounter, 5142 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 2436 SdHoareTripleChecker+Invalid, 5158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 5142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:59:54,557 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 2436 Invalid, 5158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 5142 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-13 12:59:54,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-11-13 12:59:54,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 163. [2024-11-13 12:59:54,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0123456790123457) internal successors, (164), 162 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:54,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2024-11-13 12:59:54,561 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 159 [2024-11-13 12:59:54,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:59:54,561 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2024-11-13 12:59:54,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.46875) internal successors, (222), 64 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:54,562 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2024-11-13 12:59:54,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2024-11-13 12:59:54,562 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:59:54,562 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:59:54,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-13 12:59:54,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-13 12:59:54,763 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 12:59:54,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:59:54,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1688445573, now seen corresponding path program 33 times [2024-11-13 12:59:54,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:59:54,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020028149] [2024-11-13 12:59:54,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:59:54,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:59:54,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:56,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1258 backedges. 330 proven. 928 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:56,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:59:56,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020028149] [2024-11-13 12:59:56,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020028149] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:59:56,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728867827] [2024-11-13 12:59:56,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 12:59:56,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:56,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:59:56,872 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:59:56,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-13 12:59:57,755 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2024-11-13 12:59:57,755 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:59:57,761 INFO L255 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 134 conjuncts are in the unsatisfiable core [2024-11-13 12:59:57,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:59:57,773 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 [2024-11-13 12:59:59,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1258 backedges. 376 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:59,518 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:00:02,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1258 backedges. 376 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:00:02,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728867827] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:00:02,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:00:02,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39, 39] total 114 [2024-11-13 13:00:02,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864299294] [2024-11-13 13:00:02,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:00:02,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2024-11-13 13:00:02,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:00:02,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2024-11-13 13:00:02,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=11219, Unknown=0, NotChecked=0, Total=13110 [2024-11-13 13:00:02,202 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand has 115 states, 114 states have (on average 4.2105263157894735) internal successors, (480), 115 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:00:03,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:00:03,435 INFO L93 Difference]: Finished difference Result 174 states and 175 transitions. [2024-11-13 13:00:03,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-13 13:00:03,436 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 114 states have (on average 4.2105263157894735) internal successors, (480), 115 states have internal predecessors, (480), 0 states have call successors, (0), 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 162 [2024-11-13 13:00:03,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:00:03,437 INFO L225 Difference]: With dead ends: 174 [2024-11-13 13:00:03,437 INFO L226 Difference]: Without dead ends: 174 [2024-11-13 13:00:03,438 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5450 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1946, Invalid=11394, Unknown=0, NotChecked=0, Total=13340 [2024-11-13 13:00:03,438 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 13 mSDsluCounter, 1286 mSDsCounter, 0 mSdLazyCounter, 2307 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 2308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-13 13:00:03,438 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1346 Invalid, 2308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2307 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-13 13:00:03,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-11-13 13:00:03,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 169. [2024-11-13 13:00:03,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.0119047619047619) internal successors, (170), 168 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:00:03,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2024-11-13 13:00:03,442 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 162 [2024-11-13 13:00:03,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:00:03,443 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2024-11-13 13:00:03,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 114 states have (on average 4.2105263157894735) internal successors, (480), 115 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:00:03,443 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2024-11-13 13:00:03,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2024-11-13 13:00:03,444 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:00:03,444 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:00:03,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-13 13:00:03,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-13 13:00:03,645 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 13:00:03,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:00:03,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1973714865, now seen corresponding path program 34 times [2024-11-13 13:00:03,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:00:03,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817149799] [2024-11-13 13:00:03,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:00:03,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:00:03,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:00:06,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 69 proven. 1292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:00:06,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:00:06,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817149799] [2024-11-13 13:00:06,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817149799] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:00:06,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821199516] [2024-11-13 13:00:06,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 13:00:06,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:00:06,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:00:06,331 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:00:06,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-13 13:00:06,932 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 13:00:06,932 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:00:06,939 INFO L255 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 189 conjuncts are in the unsatisfiable core [2024-11-13 13:00:06,947 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:00:07,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 13:00:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 69 proven. 1292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:00:08,403 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:00:08,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 13:00:08,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 13:00:08,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 69 proven. 1292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:00:08,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821199516] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:00:08,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:00:08,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 69 [2024-11-13 13:00:08,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300628893] [2024-11-13 13:00:08,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:00:08,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-13 13:00:08,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:00:08,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-13 13:00:08,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=4517, Unknown=0, NotChecked=0, Total=4692 [2024-11-13 13:00:08,744 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 69 states, 69 states have (on average 3.4347826086956523) internal successors, (237), 69 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:00:11,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:00:11,814 INFO L93 Difference]: Finished difference Result 282 states and 283 transitions. [2024-11-13 13:00:11,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-13 13:00:11,814 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.4347826086956523) internal successors, (237), 69 states have internal predecessors, (237), 0 states have call successors, (0), 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 168 [2024-11-13 13:00:11,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:00:11,816 INFO L225 Difference]: With dead ends: 282 [2024-11-13 13:00:11,816 INFO L226 Difference]: Without dead ends: 174 [2024-11-13 13:00:11,816 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=265, Invalid=7045, Unknown=0, NotChecked=0, Total=7310 [2024-11-13 13:00:11,816 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 23 mSDsluCounter, 2628 mSDsCounter, 0 mSdLazyCounter, 5767 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2685 SdHoareTripleChecker+Invalid, 5784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 5767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-13 13:00:11,817 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 2685 Invalid, 5784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 5767 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-13 13:00:11,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-11-13 13:00:11,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2024-11-13 13:00:11,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.0116959064327486) internal successors, (173), 171 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:00:11,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2024-11-13 13:00:11,819 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 168 [2024-11-13 13:00:11,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:00:11,819 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2024-11-13 13:00:11,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.4347826086956523) internal successors, (237), 69 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:00:11,819 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2024-11-13 13:00:11,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2024-11-13 13:00:11,820 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:00:11,820 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:00:11,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-13 13:00:12,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-13 13:00:12,021 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 13:00:12,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:00:12,021 INFO L85 PathProgramCache]: Analyzing trace with hash -524464263, now seen corresponding path program 35 times [2024-11-13 13:00:12,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:00:12,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271914469] [2024-11-13 13:00:12,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:00:12,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:00:12,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:00:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1413 backedges. 376 proven. 1037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:00:14,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:00:14,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271914469] [2024-11-13 13:00:14,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271914469] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:00:14,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855135391] [2024-11-13 13:00:14,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 13:00:14,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:00:14,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:00:14,569 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:00:14,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-13 13:00:15,210 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2024-11-13 13:00:15,210 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:00:15,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 178 conjuncts are in the unsatisfiable core [2024-11-13 13:00:15,224 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:00:15,230 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 [2024-11-13 13:00:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1413 backedges. 425 proven. 988 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:00:16,456 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:00:19,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1413 backedges. 425 proven. 988 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:00:19,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855135391] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:00:19,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:00:19,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 100 [2024-11-13 13:00:19,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844934580] [2024-11-13 13:00:19,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:00:19,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2024-11-13 13:00:19,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:00:19,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2024-11-13 13:00:19,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1427, Invalid=8673, Unknown=0, NotChecked=0, Total=10100 [2024-11-13 13:00:19,559 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand has 101 states, 100 states have (on average 4.04) internal successors, (404), 101 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:00:21,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:00:21,632 INFO L93 Difference]: Finished difference Result 183 states and 184 transitions. [2024-11-13 13:00:21,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-13 13:00:21,633 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 100 states have (on average 4.04) internal successors, (404), 101 states have internal predecessors, (404), 0 states have call successors, (0), 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 171 [2024-11-13 13:00:21,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:00:21,634 INFO L225 Difference]: With dead ends: 183 [2024-11-13 13:00:21,634 INFO L226 Difference]: Without dead ends: 183 [2024-11-13 13:00:21,634 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3854 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1485, Invalid=8817, Unknown=0, NotChecked=0, Total=10302 [2024-11-13 13:00:21,635 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 15 mSDsluCounter, 1666 mSDsCounter, 0 mSdLazyCounter, 3673 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1729 SdHoareTripleChecker+Invalid, 3674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-13 13:00:21,635 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 1729 Invalid, 3674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3673 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-13 13:00:21,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-11-13 13:00:21,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 178. [2024-11-13 13:00:21,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.0112994350282485) internal successors, (179), 177 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:00:21,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2024-11-13 13:00:21,639 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 171 [2024-11-13 13:00:21,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:00:21,640 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2024-11-13 13:00:21,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 100 states have (on average 4.04) internal successors, (404), 101 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:00:21,640 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2024-11-13 13:00:21,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2024-11-13 13:00:21,641 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:00:21,641 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:00:21,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-13 13:00:21,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-13 13:00:21,842 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 13:00:21,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:00:21,842 INFO L85 PathProgramCache]: Analyzing trace with hash -2114815027, now seen corresponding path program 36 times [2024-11-13 13:00:21,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:00:21,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374724114] [2024-11-13 13:00:21,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:00:21,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:00:21,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:00:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1522 backedges. 73 proven. 1449 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:00:24,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:00:24,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374724114] [2024-11-13 13:00:24,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374724114] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:00:24,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275577134] [2024-11-13 13:00:24,799 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 13:00:24,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:00:24,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:00:24,802 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:00:24,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-13 13:00:25,968 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2024-11-13 13:00:25,968 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:00:25,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 199 conjuncts are in the unsatisfiable core [2024-11-13 13:00:25,983 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:00:26,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 13:00:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1522 backedges. 73 proven. 1449 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:00:27,253 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:00:27,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 13:00:27,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 13:00:27,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1522 backedges. 73 proven. 1449 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:00:27,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275577134] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:00:27,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:00:27,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 70 [2024-11-13 13:00:27,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257244477] [2024-11-13 13:00:27,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:00:27,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-13 13:00:27,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:00:27,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-13 13:00:27,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=4656, Unknown=0, NotChecked=0, Total=4830 [2024-11-13 13:00:27,687 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand has 70 states, 70 states have (on average 3.5142857142857142) internal successors, (246), 70 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:00:31,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:00:31,434 INFO L93 Difference]: Finished difference Result 297 states and 298 transitions. [2024-11-13 13:00:31,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-13 13:00:31,434 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.5142857142857142) internal successors, (246), 70 states have internal predecessors, (246), 0 states have call successors, (0), 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 177 [2024-11-13 13:00:31,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:00:31,436 INFO L225 Difference]: With dead ends: 297 [2024-11-13 13:00:31,436 INFO L226 Difference]: Without dead ends: 183 [2024-11-13 13:00:31,436 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=277, Invalid=7733, Unknown=0, NotChecked=0, Total=8010 [2024-11-13 13:00:31,437 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 26 mSDsluCounter, 2997 mSDsCounter, 0 mSdLazyCounter, 6292 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 3057 SdHoareTripleChecker+Invalid, 6310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 6292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-13 13:00:31,437 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 3057 Invalid, 6310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 6292 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-13 13:00:31,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-11-13 13:00:31,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2024-11-13 13:00:31,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.011111111111111) internal successors, (182), 180 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:00:31,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2024-11-13 13:00:31,442 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 177 [2024-11-13 13:00:31,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:00:31,442 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2024-11-13 13:00:31,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.5142857142857142) internal successors, (246), 70 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:00:31,442 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2024-11-13 13:00:31,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2024-11-13 13:00:31,443 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:00:31,444 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:00:31,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-13 13:00:31,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-13 13:00:31,647 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 13:00:31,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:00:31,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1060510691, now seen corresponding path program 37 times [2024-11-13 13:00:31,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:00:31,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017319709] [2024-11-13 13:00:31,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:00:31,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:00:31,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:00:34,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 425 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:00:34,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:00:34,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017319709] [2024-11-13 13:00:34,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017319709] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:00:34,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605833563] [2024-11-13 13:00:34,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 13:00:34,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:00:34,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:00:34,460 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:00:34,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-13 13:00:34,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:00:34,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 183 conjuncts are in the unsatisfiable core [2024-11-13 13:00:34,855 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:00:36,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 477 proven. 1100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:00:36,015 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:00:37,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-13 13:00:38,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 477 proven. 1100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:00:38,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605833563] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:00:38,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:00:38,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 43, 43] total 87 [2024-11-13 13:00:38,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109675883] [2024-11-13 13:00:38,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:00:38,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2024-11-13 13:00:38,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:00:38,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2024-11-13 13:00:38,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=6727, Unknown=0, NotChecked=0, Total=7656 [2024-11-13 13:00:38,282 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand has 88 states, 87 states have (on average 4.195402298850575) internal successors, (365), 88 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:00:40,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:00:40,637 INFO L93 Difference]: Finished difference Result 192 states and 193 transitions. [2024-11-13 13:00:40,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-13 13:00:40,637 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 4.195402298850575) internal successors, (365), 88 states have internal predecessors, (365), 0 states have call successors, (0), 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 180 [2024-11-13 13:00:40,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:00:40,638 INFO L225 Difference]: With dead ends: 192 [2024-11-13 13:00:40,638 INFO L226 Difference]: Without dead ends: 192 [2024-11-13 13:00:40,639 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 294 SyntacticMatches, 20 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4157 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=970, Invalid=6862, Unknown=0, NotChecked=0, Total=7832 [2024-11-13 13:00:40,640 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 11 mSDsluCounter, 1916 mSDsCounter, 0 mSdLazyCounter, 4035 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1982 SdHoareTripleChecker+Invalid, 4036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-13 13:00:40,640 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 1982 Invalid, 4036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4035 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-13 13:00:40,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-11-13 13:00:40,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 187. [2024-11-13 13:00:40,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.010752688172043) internal successors, (188), 186 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:00:40,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2024-11-13 13:00:40,649 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 180 [2024-11-13 13:00:40,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:00:40,649 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2024-11-13 13:00:40,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 87 states have (on average 4.195402298850575) internal successors, (365), 88 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:00:40,650 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2024-11-13 13:00:40,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2024-11-13 13:00:40,651 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:00:40,651 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:00:40,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-13 13:00:40,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-13 13:00:40,852 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 13:00:40,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:00:40,853 INFO L85 PathProgramCache]: Analyzing trace with hash -2064199497, now seen corresponding path program 38 times [2024-11-13 13:00:40,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:00:40,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435405477] [2024-11-13 13:00:40,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:00:40,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:00:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:00:44,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1692 backedges. 77 proven. 1615 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:00:44,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:00:44,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435405477] [2024-11-13 13:00:44,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435405477] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:00:44,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433220521] [2024-11-13 13:00:44,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:00:44,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:00:44,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:00:44,746 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:00:44,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-13 13:00:45,243 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:00:45,243 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:00:45,250 INFO L255 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 209 conjuncts are in the unsatisfiable core [2024-11-13 13:00:45,259 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:00:46,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 13:00:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1692 backedges. 77 proven. 1615 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:00:46,699 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:00:46,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 13:00:46,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 13:00:47,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1692 backedges. 77 proven. 1615 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:00:47,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433220521] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:00:47,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:00:47,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 73 [2024-11-13 13:00:47,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143756384] [2024-11-13 13:00:47,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:00:47,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-13 13:00:47,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:00:47,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-13 13:00:47,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=5075, Unknown=0, NotChecked=0, Total=5256 [2024-11-13 13:00:47,133 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand has 73 states, 73 states have (on average 3.5342465753424657) internal successors, (258), 73 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:00:51,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:00:51,408 INFO L93 Difference]: Finished difference Result 312 states and 313 transitions. [2024-11-13 13:00:51,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-11-13 13:00:51,409 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.5342465753424657) internal successors, (258), 73 states have internal predecessors, (258), 0 states have call successors, (0), 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 186 [2024-11-13 13:00:51,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:00:51,410 INFO L225 Difference]: With dead ends: 312 [2024-11-13 13:00:51,410 INFO L226 Difference]: Without dead ends: 192 [2024-11-13 13:00:51,410 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=289, Invalid=8453, Unknown=0, NotChecked=0, Total=8742 [2024-11-13 13:00:51,411 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 27 mSDsluCounter, 3096 mSDsCounter, 0 mSdLazyCounter, 6686 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 3159 SdHoareTripleChecker+Invalid, 6705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 6686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-13 13:00:51,411 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 3159 Invalid, 6705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 6686 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-13 13:00:51,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-11-13 13:00:51,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2024-11-13 13:00:51,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.0105820105820107) internal successors, (191), 189 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) [2024-11-13 13:00:51,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2024-11-13 13:00:51,415 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 186 [2024-11-13 13:00:51,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:00:51,415 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2024-11-13 13:00:51,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.5342465753424657) internal successors, (258), 73 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:00:51,415 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2024-11-13 13:00:51,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2024-11-13 13:00:51,416 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:00:51,416 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:00:51,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-13 13:00:51,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:00:51,617 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 13:00:51,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:00:51,617 INFO L85 PathProgramCache]: Analyzing trace with hash -401151647, now seen corresponding path program 39 times [2024-11-13 13:00:51,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:00:51,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952135504] [2024-11-13 13:00:51,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:00:51,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:00:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:00:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 477 proven. 1273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:00:55,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:00:55,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952135504] [2024-11-13 13:00:55,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952135504] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:00:55,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279959995] [2024-11-13 13:00:55,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 13:00:55,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:00:55,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:00:55,285 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:00:55,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-13 13:00:57,888 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2024-11-13 13:00:57,888 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:00:57,896 INFO L255 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 155 conjuncts are in the unsatisfiable core [2024-11-13 13:00:57,905 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:00:57,908 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 [2024-11-13 13:01:00,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 532 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:01:00,401 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:01:04,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 532 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:01:04,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279959995] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:01:04,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:01:04,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 45, 45] total 132 [2024-11-13 13:01:04,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582683683] [2024-11-13 13:01:04,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:01:04,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2024-11-13 13:01:04,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:01:04,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2024-11-13 13:01:04,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2548, Invalid=15008, Unknown=0, NotChecked=0, Total=17556 [2024-11-13 13:01:04,246 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand has 133 states, 132 states have (on average 4.25) internal successors, (561), 133 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:01:05,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:01:05,786 INFO L93 Difference]: Finished difference Result 201 states and 202 transitions. [2024-11-13 13:01:05,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-13 13:01:05,786 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 132 states have (on average 4.25) internal successors, (561), 133 states have internal predecessors, (561), 0 states have call successors, (0), 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 189 [2024-11-13 13:01:05,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:01:05,788 INFO L225 Difference]: With dead ends: 201 [2024-11-13 13:01:05,788 INFO L226 Difference]: Without dead ends: 201 [2024-11-13 13:01:05,789 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7403 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=2612, Invalid=15210, Unknown=0, NotChecked=0, Total=17822 [2024-11-13 13:01:05,789 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 18 mSDsluCounter, 1413 mSDsCounter, 0 mSdLazyCounter, 2398 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 2399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-13 13:01:05,789 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1482 Invalid, 2399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2398 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-13 13:01:05,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-11-13 13:01:05,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 196. [2024-11-13 13:01:05,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.0102564102564102) internal successors, (197), 195 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:01:05,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2024-11-13 13:01:05,793 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 189 [2024-11-13 13:01:05,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:01:05,793 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2024-11-13 13:01:05,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 132 states have (on average 4.25) internal successors, (561), 133 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:01:05,794 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2024-11-13 13:01:05,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2024-11-13 13:01:05,795 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:01:05,795 INFO L215 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:01:05,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-13 13:01:05,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2024-11-13 13:01:05,996 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 13:01:05,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:01:05,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1822099381, now seen corresponding path program 40 times [2024-11-13 13:01:05,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:01:05,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339848846] [2024-11-13 13:01:05,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:01:05,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:01:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:01:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1871 backedges. 81 proven. 1790 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:01:09,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:01:09,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339848846] [2024-11-13 13:01:09,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339848846] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:01:09,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730699344] [2024-11-13 13:01:09,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 13:01:09,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:01:09,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:01:09,531 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:01:09,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-13 13:01:11,405 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 13:01:11,405 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:01:11,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 217 conjuncts are in the unsatisfiable core [2024-11-13 13:01:11,427 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:01:12,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 13:01:13,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1871 backedges. 81 proven. 1790 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:01:13,110 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:01:13,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 13:01:13,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 13:01:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1871 backedges. 81 proven. 1790 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:01:13,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730699344] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:01:13,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:01:13,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 76 [2024-11-13 13:01:13,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846326259] [2024-11-13 13:01:13,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:01:13,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-13 13:01:13,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:01:13,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-13 13:01:13,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=5512, Unknown=0, NotChecked=0, Total=5700 [2024-11-13 13:01:13,631 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand has 76 states, 76 states have (on average 3.5526315789473686) internal successors, (270), 76 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:01:17,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:01:17,934 INFO L93 Difference]: Finished difference Result 327 states and 328 transitions. [2024-11-13 13:01:17,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-13 13:01:17,934 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.5526315789473686) internal successors, (270), 76 states have internal predecessors, (270), 0 states have call successors, (0), 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 195 [2024-11-13 13:01:17,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:01:17,935 INFO L225 Difference]: With dead ends: 327 [2024-11-13 13:01:17,935 INFO L226 Difference]: Without dead ends: 201 [2024-11-13 13:01:17,936 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=301, Invalid=9205, Unknown=0, NotChecked=0, Total=9506 [2024-11-13 13:01:17,936 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 28 mSDsluCounter, 3692 mSDsCounter, 0 mSdLazyCounter, 7705 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 3758 SdHoareTripleChecker+Invalid, 7725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 7705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-13 13:01:17,937 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 3758 Invalid, 7725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 7705 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-13 13:01:17,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-11-13 13:01:17,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2024-11-13 13:01:17,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.0101010101010102) internal successors, (200), 198 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:01:17,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2024-11-13 13:01:17,940 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 195 [2024-11-13 13:01:17,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:01:17,940 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2024-11-13 13:01:17,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.5526315789473686) internal successors, (270), 76 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:01:17,940 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2024-11-13 13:01:17,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2024-11-13 13:01:17,941 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:01:17,941 INFO L215 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:01:17,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-13 13:01:18,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:01:18,142 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 13:01:18,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:01:18,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1462038965, now seen corresponding path program 41 times [2024-11-13 13:01:18,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:01:18,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289432163] [2024-11-13 13:01:18,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:01:18,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:01:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:01:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 532 proven. 1400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:01:21,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:01:21,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289432163] [2024-11-13 13:01:21,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289432163] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:01:21,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030463413] [2024-11-13 13:01:21,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 13:01:21,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:01:21,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:01:21,571 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:01:21,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-13 13:01:22,549 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2024-11-13 13:01:22,549 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:01:22,558 INFO L255 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 205 conjuncts are in the unsatisfiable core [2024-11-13 13:01:22,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:01:22,574 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 [2024-11-13 13:01:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 590 proven. 1342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:01:24,203 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:01:28,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 590 proven. 1342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:01:28,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030463413] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:01:28,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:01:28,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 115 [2024-11-13 13:01:28,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041012291] [2024-11-13 13:01:28,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:01:28,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2024-11-13 13:01:28,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:01:28,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2024-11-13 13:01:28,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1880, Invalid=11460, Unknown=0, NotChecked=0, Total=13340 [2024-11-13 13:01:28,218 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand has 116 states, 115 states have (on average 4.060869565217391) internal successors, (467), 116 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:01:30,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:01:30,941 INFO L93 Difference]: Finished difference Result 210 states and 211 transitions. [2024-11-13 13:01:30,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-13 13:01:30,941 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 115 states have (on average 4.060869565217391) internal successors, (467), 116 states have internal predecessors, (467), 0 states have call successors, (0), 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 [2024-11-13 13:01:30,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:01:30,942 INFO L225 Difference]: With dead ends: 210 [2024-11-13 13:01:30,942 INFO L226 Difference]: Without dead ends: 210 [2024-11-13 13:01:30,943 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5192 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1947, Invalid=11625, Unknown=0, NotChecked=0, Total=13572 [2024-11-13 13:01:30,943 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 18 mSDsluCounter, 2455 mSDsCounter, 0 mSdLazyCounter, 4592 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2527 SdHoareTripleChecker+Invalid, 4593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-13 13:01:30,943 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 2527 Invalid, 4593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4592 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-13 13:01:30,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2024-11-13 13:01:30,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 205. [2024-11-13 13:01:30,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0098039215686274) internal successors, (206), 204 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:01:30,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2024-11-13 13:01:30,947 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 198 [2024-11-13 13:01:30,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:01:30,948 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2024-11-13 13:01:30,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 115 states have (on average 4.060869565217391) internal successors, (467), 116 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:01:30,948 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2024-11-13 13:01:30,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2024-11-13 13:01:30,949 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:01:30,949 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:01:30,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-13 13:01:31,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:01:31,150 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 13:01:31,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:01:31,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1160140063, now seen corresponding path program 42 times [2024-11-13 13:01:31,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:01:31,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119068200] [2024-11-13 13:01:31,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:01:31,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:01:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:01:35,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 85 proven. 1974 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:01:35,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:01:35,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119068200] [2024-11-13 13:01:35,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119068200] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:01:35,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925071220] [2024-11-13 13:01:35,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 13:01:35,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:01:35,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:01:35,259 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:01:35,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-13 13:01:36,767 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2024-11-13 13:01:36,768 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:01:36,777 INFO L255 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 229 conjuncts are in the unsatisfiable core [2024-11-13 13:01:36,785 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:01:38,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 13:01:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 85 proven. 1974 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:01:38,436 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:01:38,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 13:01:38,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 13:01:38,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 85 proven. 1974 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:01:38,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925071220] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:01:38,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:01:38,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 79 [2024-11-13 13:01:38,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482382344] [2024-11-13 13:01:38,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:01:38,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2024-11-13 13:01:38,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:01:38,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2024-11-13 13:01:38,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=5967, Unknown=0, NotChecked=0, Total=6162 [2024-11-13 13:01:38,888 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand has 79 states, 79 states have (on average 3.569620253164557) internal successors, (282), 79 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:01:43,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:01:43,420 INFO L93 Difference]: Finished difference Result 342 states and 343 transitions. [2024-11-13 13:01:43,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-13 13:01:43,421 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.569620253164557) internal successors, (282), 79 states have internal predecessors, (282), 0 states have call successors, (0), 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 204 [2024-11-13 13:01:43,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:01:43,422 INFO L225 Difference]: With dead ends: 342 [2024-11-13 13:01:43,422 INFO L226 Difference]: Without dead ends: 210 [2024-11-13 13:01:43,422 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=313, Invalid=9989, Unknown=0, NotChecked=0, Total=10302 [2024-11-13 13:01:43,423 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 29 mSDsluCounter, 3602 mSDsCounter, 0 mSdLazyCounter, 7623 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 3671 SdHoareTripleChecker+Invalid, 7644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 7623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-13 13:01:43,423 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 3671 Invalid, 7644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 7623 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-13 13:01:43,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2024-11-13 13:01:43,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2024-11-13 13:01:43,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.0096618357487923) internal successors, (209), 207 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:01:43,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2024-11-13 13:01:43,427 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 204 [2024-11-13 13:01:43,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:01:43,428 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2024-11-13 13:01:43,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.569620253164557) internal successors, (282), 79 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:01:43,428 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2024-11-13 13:01:43,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2024-11-13 13:01:43,429 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:01:43,429 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:01:43,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-13 13:01:43,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:01:43,630 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 13:01:43,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:01:43,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1399498935, now seen corresponding path program 43 times [2024-11-13 13:01:43,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:01:43,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177556651] [2024-11-13 13:01:43,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:01:43,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:01:43,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:01:47,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2123 backedges. 590 proven. 1533 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:01:47,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:01:47,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177556651] [2024-11-13 13:01:47,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177556651] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:01:47,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920085927] [2024-11-13 13:01:47,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 13:01:47,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:01:47,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:01:47,598 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:01:47,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-13 13:01:48,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:01:48,143 INFO L255 TraceCheckSpWp]: Trace formula consists of 866 conjuncts, 210 conjuncts are in the unsatisfiable core [2024-11-13 13:01:48,153 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:01:49,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2123 backedges. 651 proven. 1472 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:01:49,930 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:01:51,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-13 13:01:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2123 backedges. 651 proven. 1472 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:01:52,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920085927] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:01:52,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:01:52,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49, 49] total 99 [2024-11-13 13:01:52,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584467523] [2024-11-13 13:01:52,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:01:52,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2024-11-13 13:01:52,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:01:52,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2024-11-13 13:01:52,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1202, Invalid=8698, Unknown=0, NotChecked=0, Total=9900 [2024-11-13 13:01:52,995 INFO L87 Difference]: Start difference. First operand 208 states and 209 transitions. Second operand has 100 states, 99 states have (on average 4.232323232323233) internal successors, (419), 100 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:01:55,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:01:55,808 INFO L93 Difference]: Finished difference Result 219 states and 220 transitions. [2024-11-13 13:01:55,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-13 13:01:55,809 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 99 states have (on average 4.232323232323233) internal successors, (419), 100 states have internal predecessors, (419), 0 states have call successors, (0), 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 207 [2024-11-13 13:01:55,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:01:55,810 INFO L225 Difference]: With dead ends: 219 [2024-11-13 13:01:55,810 INFO L226 Difference]: Without dead ends: 219 [2024-11-13 13:01:55,810 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 339 SyntacticMatches, 23 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5474 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1249, Invalid=8851, Unknown=0, NotChecked=0, Total=10100 [2024-11-13 13:01:55,811 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 11 mSDsluCounter, 2479 mSDsCounter, 0 mSdLazyCounter, 5208 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 2554 SdHoareTripleChecker+Invalid, 5209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-13 13:01:55,811 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 2554 Invalid, 5209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5208 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-13 13:01:55,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-11-13 13:01:55,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 214. [2024-11-13 13:01:55,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.0093896713615023) internal successors, (215), 213 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:01:55,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2024-11-13 13:01:55,815 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 207 [2024-11-13 13:01:55,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:01:55,816 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2024-11-13 13:01:55,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 99 states have (on average 4.232323232323233) internal successors, (419), 100 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:01:55,816 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2024-11-13 13:01:55,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2024-11-13 13:01:55,817 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:01:55,818 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:01:55,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-13 13:01:56,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:01:56,018 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 13:01:56,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:01:56,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1383688093, now seen corresponding path program 44 times [2024-11-13 13:01:56,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:01:56,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763036587] [2024-11-13 13:01:56,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:01:56,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:01:56,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:02:00,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 89 proven. 2167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:02:00,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:02:00,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763036587] [2024-11-13 13:02:00,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763036587] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:02:00,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34239819] [2024-11-13 13:02:00,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:02:00,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:02:00,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:02:00,524 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:02:00,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-13 13:02:01,059 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:02:01,060 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:02:01,066 INFO L255 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 239 conjuncts are in the unsatisfiable core [2024-11-13 13:02:01,075 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:02:02,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 13:02:03,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 89 proven. 2167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:02:03,175 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:02:03,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 13:02:03,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 13:02:03,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 89 proven. 2167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:02:03,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34239819] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:02:03,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:02:03,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 82 [2024-11-13 13:02:03,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309492988] [2024-11-13 13:02:03,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:02:03,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-11-13 13:02:03,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:02:03,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-11-13 13:02:03,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=6440, Unknown=0, NotChecked=0, Total=6642 [2024-11-13 13:02:03,647 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand has 82 states, 82 states have (on average 3.5853658536585367) internal successors, (294), 82 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:02:09,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:02:09,605 INFO L93 Difference]: Finished difference Result 357 states and 358 transitions. [2024-11-13 13:02:09,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-11-13 13:02:09,606 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.5853658536585367) internal successors, (294), 82 states have internal predecessors, (294), 0 states have call successors, (0), 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 213 [2024-11-13 13:02:09,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:02:09,607 INFO L225 Difference]: With dead ends: 357 [2024-11-13 13:02:09,607 INFO L226 Difference]: Without dead ends: 219 [2024-11-13 13:02:09,607 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=325, Invalid=10805, Unknown=0, NotChecked=0, Total=11130 [2024-11-13 13:02:09,608 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 30 mSDsluCounter, 4248 mSDsCounter, 0 mSdLazyCounter, 8851 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 4320 SdHoareTripleChecker+Invalid, 8873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 8851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-11-13 13:02:09,608 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 4320 Invalid, 8873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 8851 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2024-11-13 13:02:09,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-11-13 13:02:09,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2024-11-13 13:02:09,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.0092592592592593) internal successors, (218), 216 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:02:09,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2024-11-13 13:02:09,612 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 213 [2024-11-13 13:02:09,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:02:09,612 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2024-11-13 13:02:09,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.5853658536585367) internal successors, (294), 82 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:02:09,612 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2024-11-13 13:02:09,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2024-11-13 13:02:09,613 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:02:09,613 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:02:09,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-13 13:02:09,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:02:09,814 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 13:02:09,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:02:09,818 INFO L85 PathProgramCache]: Analyzing trace with hash 2128164019, now seen corresponding path program 45 times [2024-11-13 13:02:09,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:02:09,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808180753] [2024-11-13 13:02:09,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:02:09,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:02:09,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:02:14,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2323 backedges. 651 proven. 1672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:02:14,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:02:14,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808180753] [2024-11-13 13:02:14,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808180753] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:02:14,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041092296] [2024-11-13 13:02:14,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 13:02:14,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:02:14,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:02:14,265 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:02:14,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-13 13:02:16,155 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2024-11-13 13:02:16,155 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:02:16,164 INFO L255 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 176 conjuncts are in the unsatisfiable core [2024-11-13 13:02:16,175 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:02:16,182 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 [2024-11-13 13:02:19,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2323 backedges. 715 proven. 1608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:02:19,193 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:02:24,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2323 backedges. 715 proven. 1608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:02:24,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041092296] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:02:24,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:02:24,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 51, 51] total 150 [2024-11-13 13:02:24,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101382800] [2024-11-13 13:02:24,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:02:24,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2024-11-13 13:02:24,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:02:24,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2024-11-13 13:02:24,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3304, Invalid=19346, Unknown=0, NotChecked=0, Total=22650 [2024-11-13 13:02:24,428 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand has 151 states, 150 states have (on average 4.28) internal successors, (642), 151 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:02:27,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:02:27,200 INFO L93 Difference]: Finished difference Result 228 states and 229 transitions. [2024-11-13 13:02:27,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-13 13:02:27,201 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 150 states have (on average 4.28) internal successors, (642), 151 states have internal predecessors, (642), 0 states have call successors, (0), 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 216 [2024-11-13 13:02:27,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:02:27,203 INFO L225 Difference]: With dead ends: 228 [2024-11-13 13:02:27,207 INFO L226 Difference]: Without dead ends: 228 [2024-11-13 13:02:27,208 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9653 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=3377, Invalid=19575, Unknown=0, NotChecked=0, Total=22952 [2024-11-13 13:02:27,209 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 13 mSDsluCounter, 2263 mSDsCounter, 0 mSdLazyCounter, 4083 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2341 SdHoareTripleChecker+Invalid, 4084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-13 13:02:27,209 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2341 Invalid, 4084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4083 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-13 13:02:27,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2024-11-13 13:02:27,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 223. [2024-11-13 13:02:27,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.009009009009009) internal successors, (224), 222 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:02:27,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 224 transitions. [2024-11-13 13:02:27,221 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 224 transitions. Word has length 216 [2024-11-13 13:02:27,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:02:27,221 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 224 transitions. [2024-11-13 13:02:27,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 150 states have (on average 4.28) internal successors, (642), 151 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:02:27,222 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 224 transitions. [2024-11-13 13:02:27,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2024-11-13 13:02:27,223 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:02:27,223 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:02:27,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-11-13 13:02:27,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:02:27,424 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 13:02:27,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:02:27,424 INFO L85 PathProgramCache]: Analyzing trace with hash -822604409, now seen corresponding path program 46 times [2024-11-13 13:02:27,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:02:27,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269312269] [2024-11-13 13:02:27,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:02:27,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:02:27,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:02:32,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2462 backedges. 93 proven. 2369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:02:32,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:02:32,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269312269] [2024-11-13 13:02:32,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269312269] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:02:32,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198795102] [2024-11-13 13:02:32,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 13:02:32,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:02:32,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:02:32,429 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:02:32,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-13 13:02:34,388 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 13:02:34,388 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:02:34,396 INFO L255 TraceCheckSpWp]: Trace formula consists of 927 conjuncts, 247 conjuncts are in the unsatisfiable core [2024-11-13 13:02:34,406 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:02:36,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 13:02:36,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2462 backedges. 93 proven. 2369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:02:36,458 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:02:36,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 13:02:36,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 13:02:37,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2462 backedges. 93 proven. 2369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:02:37,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198795102] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:02:37,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:02:37,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 85 [2024-11-13 13:02:37,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452507293] [2024-11-13 13:02:37,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:02:37,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-11-13 13:02:37,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:02:37,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-11-13 13:02:37,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=6931, Unknown=0, NotChecked=0, Total=7140 [2024-11-13 13:02:37,042 INFO L87 Difference]: Start difference. First operand 223 states and 224 transitions. Second operand has 85 states, 85 states have (on average 3.6) internal successors, (306), 85 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:02:43,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:02:43,489 INFO L93 Difference]: Finished difference Result 372 states and 373 transitions. [2024-11-13 13:02:43,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-11-13 13:02:43,489 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.6) internal successors, (306), 85 states have internal predecessors, (306), 0 states have call successors, (0), 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 222 [2024-11-13 13:02:43,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:02:43,491 INFO L225 Difference]: With dead ends: 372 [2024-11-13 13:02:43,491 INFO L226 Difference]: Without dead ends: 228 [2024-11-13 13:02:43,491 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=337, Invalid=11653, Unknown=0, NotChecked=0, Total=11990 [2024-11-13 13:02:43,492 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 33 mSDsluCounter, 4720 mSDsCounter, 0 mSdLazyCounter, 9893 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 4795 SdHoareTripleChecker+Invalid, 9916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 9893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-11-13 13:02:43,492 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 4795 Invalid, 9916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 9893 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2024-11-13 13:02:43,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2024-11-13 13:02:43,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 226. [2024-11-13 13:02:43,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.008888888888889) internal successors, (227), 225 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:02:43,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 227 transitions. [2024-11-13 13:02:43,495 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 227 transitions. Word has length 222 [2024-11-13 13:02:43,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:02:43,495 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 227 transitions. [2024-11-13 13:02:43,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.6) internal successors, (306), 85 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:02:43,495 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 227 transitions. [2024-11-13 13:02:43,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2024-11-13 13:02:43,496 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:02:43,496 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:02:43,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-13 13:02:43,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-11-13 13:02:43,699 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 13:02:43,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:02:43,699 INFO L85 PathProgramCache]: Analyzing trace with hash -346121935, now seen corresponding path program 47 times [2024-11-13 13:02:43,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:02:43,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393586550] [2024-11-13 13:02:43,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:02:43,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:02:43,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:02:48,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2532 backedges. 715 proven. 1817 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:02:48,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:02:48,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393586550] [2024-11-13 13:02:48,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393586550] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:02:48,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795303425] [2024-11-13 13:02:48,715 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 13:02:48,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:02:48,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:02:48,717 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:02:48,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-13 13:02:50,103 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2024-11-13 13:02:50,103 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:02:50,132 INFO L255 TraceCheckSpWp]: Trace formula consists of 940 conjuncts, 232 conjuncts are in the unsatisfiable core [2024-11-13 13:02:50,144 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:02:50,154 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 [2024-11-13 13:02:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2532 backedges. 782 proven. 1750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:02:52,517 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:02:58,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2532 backedges. 782 proven. 1750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:02:58,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795303425] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:02:58,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:02:58,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 130 [2024-11-13 13:02:58,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322050060] [2024-11-13 13:02:58,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:02:58,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2024-11-13 13:02:58,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:02:58,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2024-11-13 13:02:58,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2396, Invalid=14634, Unknown=0, NotChecked=0, Total=17030 [2024-11-13 13:02:58,350 INFO L87 Difference]: Start difference. First operand 226 states and 227 transitions. Second operand has 131 states, 130 states have (on average 4.076923076923077) internal successors, (530), 131 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:03:02,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:03:02,059 INFO L93 Difference]: Finished difference Result 237 states and 238 transitions. [2024-11-13 13:03:02,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-13 13:03:02,059 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 130 states have (on average 4.076923076923077) internal successors, (530), 131 states have internal predecessors, (530), 0 states have call successors, (0), 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 225 [2024-11-13 13:03:02,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:03:02,060 INFO L225 Difference]: With dead ends: 237 [2024-11-13 13:03:02,060 INFO L226 Difference]: Without dead ends: 237 [2024-11-13 13:03:02,061 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6728 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=2472, Invalid=14820, Unknown=0, NotChecked=0, Total=17292 [2024-11-13 13:03:02,061 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 16 mSDsluCounter, 2698 mSDsCounter, 0 mSdLazyCounter, 5681 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2779 SdHoareTripleChecker+Invalid, 5682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-13 13:03:02,061 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 2779 Invalid, 5682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5681 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-13 13:03:02,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-11-13 13:03:02,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 232. [2024-11-13 13:03:02,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.0086580086580086) internal successors, (233), 231 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:03:02,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 233 transitions. [2024-11-13 13:03:02,066 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 233 transitions. Word has length 225 [2024-11-13 13:03:02,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:03:02,066 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 233 transitions. [2024-11-13 13:03:02,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 130 states have (on average 4.076923076923077) internal successors, (530), 131 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:03:02,067 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 233 transitions. [2024-11-13 13:03:02,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2024-11-13 13:03:02,068 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:03:02,068 INFO L215 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:03:02,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-13 13:03:02,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:03:02,269 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 13:03:02,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:03:02,269 INFO L85 PathProgramCache]: Analyzing trace with hash -63726715, now seen corresponding path program 48 times [2024-11-13 13:03:02,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:03:02,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246568049] [2024-11-13 13:03:02,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:03:02,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:03:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:03:08,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2677 backedges. 97 proven. 2580 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:03:08,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:03:08,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246568049] [2024-11-13 13:03:08,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246568049] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:03:08,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058715194] [2024-11-13 13:03:08,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 13:03:08,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:03:08,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:03:08,005 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:03:08,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-13 13:03:11,915 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2024-11-13 13:03:11,915 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:03:11,927 INFO L255 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 195 conjuncts are in the unsatisfiable core [2024-11-13 13:03:11,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:03:11,940 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 [2024-11-13 13:03:13,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-13 13:03:51,096 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:03:51,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2024-11-13 13:03:52,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2677 backedges. 782 proven. 1895 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:03:52,203 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:04:04,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-13 13:04:04,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-13 13:04:09,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2677 backedges. 782 proven. 1895 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:04:09,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058715194] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:04:09,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:04:09,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 169 [2024-11-13 13:04:09,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124940090] [2024-11-13 13:04:09,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:04:09,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 169 states [2024-11-13 13:04:09,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:04:09,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2024-11-13 13:04:09,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2895, Invalid=25496, Unknown=1, NotChecked=0, Total=28392 [2024-11-13 13:04:09,452 INFO L87 Difference]: Start difference. First operand 232 states and 233 transitions. Second operand has 169 states, 169 states have (on average 4.06508875739645) internal successors, (687), 169 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:04:22,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 13:09:11,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:09:11,940 INFO L93 Difference]: Finished difference Result 398 states and 399 transitions. [2024-11-13 13:09:11,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-11-13 13:09:11,941 INFO L78 Accepts]: Start accepts. Automaton has has 169 states, 169 states have (on average 4.06508875739645) internal successors, (687), 169 states have internal predecessors, (687), 0 states have call successors, (0), 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 231 [2024-11-13 13:09:11,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:09:11,942 INFO L225 Difference]: With dead ends: 398 [2024-11-13 13:09:11,942 INFO L226 Difference]: Without dead ends: 248 [2024-11-13 13:09:11,953 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11662 ImplicationChecksByTransitivity, 344.2s TimeCoverageRelationStatistics Valid=5744, Invalid=46009, Unknown=3, NotChecked=0, Total=51756 [2024-11-13 13:09:11,954 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 704 mSDsluCounter, 3393 mSDsCounter, 0 mSdLazyCounter, 8082 mSolverCounterSat, 101 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 3471 SdHoareTripleChecker+Invalid, 8184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 8082 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2024-11-13 13:09:11,954 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [704 Valid, 3471 Invalid, 8184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 8082 Invalid, 1 Unknown, 0 Unchecked, 12.0s Time] [2024-11-13 13:09:11,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2024-11-13 13:09:11,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 241. [2024-11-13 13:09:11,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.0083333333333333) internal successors, (242), 240 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:09:11,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2024-11-13 13:09:11,961 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 231 [2024-11-13 13:09:11,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:09:11,965 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2024-11-13 13:09:11,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 169 states, 169 states have (on average 4.06508875739645) internal successors, (687), 169 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:09:11,965 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2024-11-13 13:09:11,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2024-11-13 13:09:11,966 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:09:11,967 INFO L215 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:09:11,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-11-13 13:09:12,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:09:12,168 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 13:09:12,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:09:12,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1249507823, now seen corresponding path program 49 times [2024-11-13 13:09:12,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:09:12,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104003718] [2024-11-13 13:09:12,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:09:12,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:09:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:09:17,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2901 backedges. 101 proven. 2800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:09:17,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:09:17,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104003718] [2024-11-13 13:09:17,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104003718] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:09:17,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879824393] [2024-11-13 13:09:17,722 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 13:09:17,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:09:17,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:09:17,724 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:09:17,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-13 13:09:18,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:09:18,428 INFO L255 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 269 conjuncts are in the unsatisfiable core [2024-11-13 13:09:18,439 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:09:21,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 13:09:22,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2901 backedges. 101 proven. 2800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:09:22,617 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:09:23,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 13:09:23,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 13:09:23,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2901 backedges. 101 proven. 2800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:09:23,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879824393] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:09:23,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:09:23,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 91 [2024-11-13 13:09:23,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486651427] [2024-11-13 13:09:23,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:09:23,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2024-11-13 13:09:23,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:09:23,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2024-11-13 13:09:23,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=7967, Unknown=0, NotChecked=0, Total=8190 [2024-11-13 13:09:23,576 INFO L87 Difference]: Start difference. First operand 241 states and 242 transitions. Second operand has 91 states, 91 states have (on average 3.6263736263736264) internal successors, (330), 91 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:09:36,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:09:36,493 INFO L93 Difference]: Finished difference Result 402 states and 403 transitions. [2024-11-13 13:09:36,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2024-11-13 13:09:36,494 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.6263736263736264) internal successors, (330), 91 states have internal predecessors, (330), 0 states have call successors, (0), 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 240 [2024-11-13 13:09:36,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:09:36,495 INFO L225 Difference]: With dead ends: 402 [2024-11-13 13:09:36,495 INFO L226 Difference]: Without dead ends: 246 [2024-11-13 13:09:36,497 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=361, Invalid=13445, Unknown=0, NotChecked=0, Total=13806 [2024-11-13 13:09:36,497 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 31 mSDsluCounter, 5654 mSDsCounter, 0 mSdLazyCounter, 11717 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 5735 SdHoareTripleChecker+Invalid, 11742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 11717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2024-11-13 13:09:36,498 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 5735 Invalid, 11742 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [25 Valid, 11717 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2024-11-13 13:09:36,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2024-11-13 13:09:36,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 244. [2024-11-13 13:09:36,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.008230452674897) internal successors, (245), 243 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:09:36,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 245 transitions. [2024-11-13 13:09:36,502 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 245 transitions. Word has length 240 [2024-11-13 13:09:36,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:09:36,502 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 245 transitions. [2024-11-13 13:09:36,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.6263736263736264) internal successors, (330), 91 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:09:36,503 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 245 transitions. [2024-11-13 13:09:36,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2024-11-13 13:09:36,504 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:09:36,504 INFO L215 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:09:36,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2024-11-13 13:09:36,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:09:36,706 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 13:09:36,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:09:36,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1872277273, now seen corresponding path program 50 times [2024-11-13 13:09:36,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:09:36,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245175038] [2024-11-13 13:09:36,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:09:36,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:09:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:09:44,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2977 backedges. 852 proven. 2125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:09:44,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:09:44,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245175038] [2024-11-13 13:09:44,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245175038] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:09:44,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568537422] [2024-11-13 13:09:44,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:09:44,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:09:44,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:09:44,288 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:09:44,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-13 13:09:44,955 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:09:44,955 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:09:44,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 1014 conjuncts, 249 conjuncts are in the unsatisfiable core [2024-11-13 13:09:44,971 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:09:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2977 backedges. 925 proven. 2052 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:09:49,013 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:09:52,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-13 13:09:56,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2977 backedges. 925 proven. 2052 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:09:56,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568537422] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:09:56,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:09:56,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 140 [2024-11-13 13:09:56,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256292726] [2024-11-13 13:09:56,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:09:56,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2024-11-13 13:09:56,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:09:56,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2024-11-13 13:09:56,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2694, Invalid=17046, Unknown=0, NotChecked=0, Total=19740 [2024-11-13 13:09:56,470 INFO L87 Difference]: Start difference. First operand 244 states and 245 transitions. Second operand has 141 states, 140 states have (on average 4.085714285714285) internal successors, (572), 141 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:10:03,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:10:03,312 INFO L93 Difference]: Finished difference Result 255 states and 256 transitions. [2024-11-13 13:10:03,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-13 13:10:03,313 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 140 states have (on average 4.085714285714285) internal successors, (572), 141 states have internal predecessors, (572), 0 states have call successors, (0), 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 243 [2024-11-13 13:10:03,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:10:03,314 INFO L225 Difference]: With dead ends: 255 [2024-11-13 13:10:03,314 INFO L226 Difference]: Without dead ends: 255 [2024-11-13 13:10:03,315 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7916 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=2776, Invalid=17246, Unknown=0, NotChecked=0, Total=20022 [2024-11-13 13:10:03,316 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 18 mSDsluCounter, 3621 mSDsCounter, 0 mSdLazyCounter, 6836 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 3708 SdHoareTripleChecker+Invalid, 6837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2024-11-13 13:10:03,316 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 3708 Invalid, 6837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6836 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2024-11-13 13:10:03,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2024-11-13 13:10:03,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 250. [2024-11-13 13:10:03,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.0080321285140563) internal successors, (251), 249 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:10:03,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 251 transitions. [2024-11-13 13:10:03,321 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 251 transitions. Word has length 243 [2024-11-13 13:10:03,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:10:03,321 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 251 transitions. [2024-11-13 13:10:03,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 140 states have (on average 4.085714285714285) internal successors, (572), 141 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:10:03,321 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 251 transitions. [2024-11-13 13:10:03,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2024-11-13 13:10:03,322 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:10:03,323 INFO L215 NwaCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:10:03,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-11-13 13:10:03,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:10:03,524 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 13:10:03,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:10:03,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1066425491, now seen corresponding path program 51 times [2024-11-13 13:10:03,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:10:03,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450592336] [2024-11-13 13:10:03,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:10:03,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:10:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:10:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3134 backedges. 105 proven. 3029 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:10:11,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:10:11,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450592336] [2024-11-13 13:10:11,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450592336] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:10:11,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167024308] [2024-11-13 13:10:11,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 13:10:11,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:10:11,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:10:11,771 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:10:11,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-13 13:10:21,651 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2024-11-13 13:10:21,651 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:10:21,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 279 conjuncts are in the unsatisfiable core [2024-11-13 13:10:21,669 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:10:24,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 13:10:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3134 backedges. 105 proven. 3029 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:10:25,064 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:10:25,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 13:10:25,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 13:10:25,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3134 backedges. 105 proven. 3029 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:10:25,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167024308] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:10:25,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:10:25,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 94 [2024-11-13 13:10:25,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250518344] [2024-11-13 13:10:25,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:10:25,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2024-11-13 13:10:25,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:10:25,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2024-11-13 13:10:25,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=8512, Unknown=0, NotChecked=0, Total=8742 [2024-11-13 13:10:25,820 INFO L87 Difference]: Start difference. First operand 250 states and 251 transitions. Second operand has 94 states, 94 states have (on average 3.6382978723404253) internal successors, (342), 94 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:10:36,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:10:36,279 INFO L93 Difference]: Finished difference Result 417 states and 418 transitions. [2024-11-13 13:10:36,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2024-11-13 13:10:36,280 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 3.6382978723404253) internal successors, (342), 94 states have internal predecessors, (342), 0 states have call successors, (0), 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 249 [2024-11-13 13:10:36,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:10:36,281 INFO L225 Difference]: With dead ends: 417 [2024-11-13 13:10:36,281 INFO L226 Difference]: Without dead ends: 255 [2024-11-13 13:10:36,283 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=373, Invalid=14389, Unknown=0, NotChecked=0, Total=14762 [2024-11-13 13:10:36,283 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 34 mSDsluCounter, 5878 mSDsCounter, 0 mSdLazyCounter, 12380 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 5962 SdHoareTripleChecker+Invalid, 12406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 12380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2024-11-13 13:10:36,285 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 5962 Invalid, 12406 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [26 Valid, 12380 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2024-11-13 13:10:36,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2024-11-13 13:10:36,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 253. [2024-11-13 13:10:36,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.007936507936508) internal successors, (254), 252 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:10:36,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 254 transitions. [2024-11-13 13:10:36,300 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 254 transitions. Word has length 249 [2024-11-13 13:10:36,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:10:36,300 INFO L471 AbstractCegarLoop]: Abstraction has 253 states and 254 transitions. [2024-11-13 13:10:36,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 3.6382978723404253) internal successors, (342), 94 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:10:36,300 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 254 transitions. [2024-11-13 13:10:36,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2024-11-13 13:10:36,301 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:10:36,301 INFO L215 NwaCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:10:36,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-11-13 13:10:36,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:10:36,503 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 13:10:36,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:10:36,503 INFO L85 PathProgramCache]: Analyzing trace with hash 2115575171, now seen corresponding path program 52 times [2024-11-13 13:10:36,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:10:36,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952396815] [2024-11-13 13:10:36,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:10:36,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:10:36,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:10:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3213 backedges. 925 proven. 2288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:10:43,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:10:43,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952396815] [2024-11-13 13:10:43,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952396815] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:10:43,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378829581] [2024-11-13 13:10:43,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 13:10:43,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:10:43,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:10:43,734 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:10:43,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-13 13:10:46,568 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 13:10:46,568 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:10:46,578 INFO L255 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 259 conjuncts are in the unsatisfiable core [2024-11-13 13:10:46,588 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:10:46,595 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 [2024-11-13 13:10:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3213 backedges. 1001 proven. 2212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:10:50,078 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:10:58,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3213 backedges. 1001 proven. 2212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:10:58,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378829581] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:10:58,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:10:58,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 145 [2024-11-13 13:10:58,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661854505] [2024-11-13 13:10:58,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:10:58,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2024-11-13 13:10:58,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:10:58,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2024-11-13 13:10:58,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2975, Invalid=18195, Unknown=0, NotChecked=0, Total=21170 [2024-11-13 13:10:58,631 INFO L87 Difference]: Start difference. First operand 253 states and 254 transitions. Second operand has 146 states, 145 states have (on average 4.089655172413793) internal successors, (593), 146 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:11:05,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:11:05,473 INFO L93 Difference]: Finished difference Result 264 states and 265 transitions. [2024-11-13 13:11:05,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-13 13:11:05,474 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 145 states have (on average 4.089655172413793) internal successors, (593), 146 states have internal predecessors, (593), 0 states have call successors, (0), 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 252 [2024-11-13 13:11:05,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:11:05,475 INFO L225 Difference]: With dead ends: 264 [2024-11-13 13:11:05,475 INFO L226 Difference]: Without dead ends: 264 [2024-11-13 13:11:05,476 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8462 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=3060, Invalid=18402, Unknown=0, NotChecked=0, Total=21462 [2024-11-13 13:11:05,476 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 18 mSDsluCounter, 3310 mSDsCounter, 0 mSdLazyCounter, 6807 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 3400 SdHoareTripleChecker+Invalid, 6808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2024-11-13 13:11:05,476 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 3400 Invalid, 6808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6807 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2024-11-13 13:11:05,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-11-13 13:11:05,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 259. [2024-11-13 13:11:05,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.0077519379844961) internal successors, (260), 258 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:11:05,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 260 transitions. [2024-11-13 13:11:05,479 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 260 transitions. Word has length 252 [2024-11-13 13:11:05,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:11:05,479 INFO L471 AbstractCegarLoop]: Abstraction has 259 states and 260 transitions. [2024-11-13 13:11:05,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 145 states have (on average 4.089655172413793) internal successors, (593), 146 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:11:05,480 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 260 transitions. [2024-11-13 13:11:05,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2024-11-13 13:11:05,481 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:11:05,481 INFO L215 NwaCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:11:05,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-11-13 13:11:05,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2024-11-13 13:11:05,682 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 13:11:05,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:11:05,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1011213737, now seen corresponding path program 53 times [2024-11-13 13:11:05,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:11:05,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420356900] [2024-11-13 13:11:05,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:11:05,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:11:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:11:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3376 backedges. 109 proven. 3267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:11:12,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:11:12,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420356900] [2024-11-13 13:11:12,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420356900] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:11:12,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454307340] [2024-11-13 13:11:12,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 13:11:12,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:11:12,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:11:12,753 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:11:12,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-11-13 13:11:16,603 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2024-11-13 13:11:16,603 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:11:16,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 291 conjuncts are in the unsatisfiable core [2024-11-13 13:11:16,633 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:11:20,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 13:11:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3376 backedges. 109 proven. 3267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:11:21,216 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:11:21,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 13:11:21,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 13:11:22,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3376 backedges. 109 proven. 3267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:11:22,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454307340] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:11:22,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:11:22,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 99 [2024-11-13 13:11:22,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556974101] [2024-11-13 13:11:22,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:11:22,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2024-11-13 13:11:22,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:11:22,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2024-11-13 13:11:22,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=9457, Unknown=0, NotChecked=0, Total=9702 [2024-11-13 13:11:22,268 INFO L87 Difference]: Start difference. First operand 259 states and 260 transitions. Second operand has 99 states, 99 states have (on average 3.606060606060606) internal successors, (357), 99 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:11:34,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:11:34,206 INFO L93 Difference]: Finished difference Result 432 states and 433 transitions. [2024-11-13 13:11:34,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2024-11-13 13:11:34,207 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 3.606060606060606) internal successors, (357), 99 states have internal predecessors, (357), 0 states have call successors, (0), 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 258 [2024-11-13 13:11:34,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:11:34,207 INFO L225 Difference]: With dead ends: 432 [2024-11-13 13:11:34,207 INFO L226 Difference]: Without dead ends: 264 [2024-11-13 13:11:34,209 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=385, Invalid=15365, Unknown=0, NotChecked=0, Total=15750 [2024-11-13 13:11:34,209 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 33 mSDsluCounter, 6661 mSDsCounter, 0 mSdLazyCounter, 14121 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 6748 SdHoareTripleChecker+Invalid, 14148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 14121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2024-11-13 13:11:34,209 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 6748 Invalid, 14148 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [27 Valid, 14121 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2024-11-13 13:11:34,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-11-13 13:11:34,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 262. [2024-11-13 13:11:34,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.0076628352490422) internal successors, (263), 261 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:11:34,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 263 transitions. [2024-11-13 13:11:34,213 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 263 transitions. Word has length 258 [2024-11-13 13:11:34,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:11:34,213 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 263 transitions. [2024-11-13 13:11:34,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 3.606060606060606) internal successors, (357), 99 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:11:34,214 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 263 transitions. [2024-11-13 13:11:34,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2024-11-13 13:11:34,215 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:11:34,215 INFO L215 NwaCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:11:34,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-11-13 13:11:34,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2024-11-13 13:11:34,416 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-13 13:11:34,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:11:34,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1382652161, now seen corresponding path program 54 times [2024-11-13 13:11:34,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:11:34,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929853019] [2024-11-13 13:11:34,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:11:34,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:11:34,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:11:40,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3458 backedges. 1001 proven. 2457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:11:40,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:11:40,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929853019] [2024-11-13 13:11:40,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929853019] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:11:40,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476852455] [2024-11-13 13:11:40,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 13:11:40,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:11:40,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:11:40,843 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:11:40,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c76b3f29-d655-402f-b70b-9c77804ad71c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process